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EN 300 338-3 - V1.1.1 - Electromagnetic compatibility and

1. Composition The equipment shall provide factory default values for all non distress DSC messages as specified in ITU R Recommendation M 493 12 2 annex 3 and summarized in figure A 1 for all parameters where the operator has the option to select or enter more than one value and has not already done so The default values for the operator composed distress alert shall be the default distress alert as specified in the sent distress automated procedure A destination MMSI that does not have at least 9 digits entered is invalid No DSC message shall be able to be sent that has an invalid parameter For simplicity of the user interface a the DSC message composition interface shall be such that the operator needs no user manual to initiate the desired DSC message b parameter descriptions and terms shall be provided in plain language c all parameters of the DSC message that do not require an operator choice shall be entered automatically d guidance and or prompting shall be provided for the entry of any necessary parameters of the DSC message if these parameters and or their values are not plainly visible from context or on the display For data entry a the equipment shall only allow the operator to compose and send DSC messages that are compliant with clause 5 2 4 b acknowledgements shall be automatically composed by the equipment and user options for these acknowledgements are provided by the automated procedures c the equip
2. PRESS START WAIT FOR ACK CANCEL THIS TO INITIATE TX IN 4 09 MY DISTRESS CANCEL PROC Caneel Resend DISIR CANCEL Seen ENT Text of distress cancel message here TRANSMITTING START VOICE STANDBY CANCEL ON 16 Indicate more if screen full DISTR CANCI COMPLETI Figure 1b Example windows of the cancel distress procedure at various stages The above examples are only examples They show one means of providing the minimum required information The layout method and choice of text are up to the manufacturer 6 4 12 Acknowledgments The procedure shall be considered acknowledged upon reception of the first distress alert acknowledgement concerning the same distress event 6 4 13 Termination Prior to acknowledgement the procedure can not be terminated either by the operator or the equipment it may only be cancelled as described in clause 6 4 11 After acknowledgment the procedure may only be terminated manually After a sending distress automated procedure the equipment should not automatically start displaying any new unread DSC messages from memory 6 4 14 Warnings The procedure shall provide warnings for incorrect entered parameters The operator shall have the option to go back to the stage of the procedure where the action was taken that caused the warning ETSI 22 ETSI EN 300 338 3 V1 1 1 2010 02 6 5 Receiving distress automated procedure 6 5 1 Procedure The re
3. engaged in traffic or accept the tuning 6 7 7 Acknowledgments Acknowledgment options shall only be provided if the initial DSC message requests an acknowledgement and the acknowledgment option is possible EXAMPLE The able to comply option is not possible for an individually addressed DSC message requesting telephony but providing no subsequent communication frequency information Only the comply with mode frequency change and Unable to comply options are possible In the case of a received individual call the radio shall be capable of identifying if the requested working channel identified in the call is available in the equipment If this channel is available the radio shall display the call details and compose an able to comply acknowledgement which shall only be transmitted manually Switching to the channel identified shall only be performed after a manual able to comply acknowledgement has been transmitted If this channel is not available the radio shall display the call details and compose an unable to comply acknowledgement with 104 as the first telecommand and 108 as the second telecommand This acknowledgement may be automatic Any unable to comply acknowledgement other than that specified above shall be no reason given The able to comply option shall only require a single action by the operator to respond e g lifting the handset The operator shall not be required to compose any elements of this
4. eon eed ertet eerte epe te ede Ee kart eee eee N y es 20 6 4 11 1 Examples of cancel distress displays on VHF equipment sseeeeeeeeenee nene 20 6 4 12 Acknowledgments edu ete Ue ebd e Ra beet rene eee irae e e e EE RR UR eben 21 6 4 13 Termination me OE E REPRE HAE oe dee eA aede aie o 21 6 4 14 WarnIngs ae de ehem eee aim ies 21 6 5 Receiving distress automated procedure ssesssssssssesseseeeeeee neret enne nene trennen nennen 22 6 5 1 Proced re iUe OU Rte ne AE eie uie AR eae 22 6 5 2 HEIC EE 23 6 5 3 lr PEE 23 6 5 3 1 Examples of received distress procedure displays on VHF equipment sese 24 6 5 4 Handling received DSC Messages eceeceescesscesecsecsseceecseecsecaeecaeecaeseaeeeeeesseseesseeasesaecaecnaecsaecaeeeneees 24 ETSI 4 ETSI EN 300 338 3 V1 1 1 2010 02 6 5 5 Alarms eie one See oh BAe Roh EI bee URS 25 6 5 6 Determining Subsequent communications sees eene nennen eene en rennen terree 25 6 5 7 Automated t ning siae npe tpe entem eder dni RIS 25 6 5 8 Acknowledgments is ete iostec epe en PU REI dip eee 25 6 5 9 Termination 5 eode is eR DP ee ee gH aD eG A ig Ah st 25 6 5 10 Warnes iiec ite Ain RIeeD Ep eRPEpe Heels biens 25 6 6 Sending non distress automated procedure ssssssssesseeseeeeeee eene neen nennen nre 25 6 6 1 Procedure iem bene EDS eee ee es Re E r ies 25 6 6 2 Tasks zuresabneiescemu eile EOS esmem He PPP E
5. nennen rennen S tenete ee trente enne 34 6 8 1 Procedute eot Rob iU tn bete nU 34 6 8 2 NE CLE 34 6 8 3 Display iicet iet tiit e opina na icu ese retentus ties cium teles eiue etie OR ee 34 6 8 4 Handling received DSCMeSSages reete ERU U een temet potete fert Un 34 6 8 5 Tuning of the general receiver and transmitter eese enne eene ener 34 6 8 6 T rminatiOn iecit Pte p ERR IRR RERO D ERRORI Dr Or RD eid 35 6 9 Handling incoming calls while the equipment is engaged sss nennen 35 6 9 1 Procedure eco e ree Oque eter ar RO sio oR Ad aes 35 6 9 2 TASKS 5n tree bt Debra qr teh cm ape PAP EHE ahasiaelh 35 6 9 2 1 Higher priority calls tpe rr e o ME iei eterne 35 6 9 2 1 1 Higher priority calls acceptance s is eiieeii re oeer EES nennen eene eene enne erret ne trennen nnns 36 6 9 2 1 2 Higher priority calls non acceptance ssesseeeeeseeseeeeeee eene eene rennen tene trennen neis 36 6 9 2 2 Other calls 3 2 ret ete RR Reed nit e d RO 36 6 9 2 3 Termination of automated procedures essere eene nennen trennen trennen ene 36 6 9 2 4 Action after termination of an automated procedure sese 36 6 9 2 5 Putting automated procedures on hold optional eese 36 6 9 2 6 Controlling non terminated automated procedures optional essere 37 Annex A normative DSC message COMPOSItION scssscccssscesssscssssccssscssssss
6. or b log the call A discrete audible alarm will sound The radio will not change to any channel specified in the new call unless the operator manually accepts the new call ETSI 36 ETSI EN 300 338 3 V1 1 1 2010 02 6 9 2 1 1 Higher priority calls acceptance If the equipment is engaged and the operator manually accepts this new higher priority call the equipment will a abandon any current automated procedure and engage in the new call or b ifthe equipment is designed with the option to handle a background procedure place the current automated procedure on hold and engage in the new call The equipment may then send any DSC response or any acknowledgement requested by this new call and select the channel for subsequent communications requested by this call 6 9 2 1 2 Higher priority calls non acceptance If the equipment is engaged and the operator does not manually accept this new higher priority call then the new call is automatically placed in the received call memory and is flagged as an unread call in memory and the equipment shall not send any DSC response or acknowledgement requested by this new call 6 9 2 2 Other calls If the equipment is engaged and a DSC call pertinent to the station is received with a lower or equal priority to the current call then the equipment will not display the call information of the new call The new call is automatically placed in the received call memory and is flagged as an un
7. ore cr Dep RO e RD RR I e DE TREE EU RD TO ES Tare EES 10 4 Controls and indicators in Class D DSC equipment eese nennen 10 4 1 Masualandication ueterem E ER spliced was PR e bnt ERR ta etie mee REPE EE RE tn 10 4 1 1 Primary DSC alphanumeric display eese eene nennen nennen rennen nennen nene 10 4 1 1 1 Additional display information essere trennen rennen tenete trennen teen trennen ene 10 4 1 2 Display requirements for additional controllers esee ener 10 4 1 3 Hand lang visual Information sssr oscar e irre Eens 11 5 Technical requirements zoe etre Pete te rete eran diee poe tede 11 5 1 Facilities for DSC transmission and reception sseeeseeeeeeeeeeeee nennen rennen eerte rennen enne 11 5 1 1 Watch receiver capabilities ies epe esee e ert redire ier Ebene 11 5 2 Facilities for coding and decoding of DSC sse enne nennen trennen nenne 11 5 2 1 Callfunctions occ et atte Shas Sos sph eh heck Se Po Epid i 11 5 2 2 INDIVIDUAL calls 2 ehe he is ter PRG OI a RAR ties 11 5 2 3 ATI SHIPS calls 3 35 eade p erp PR eem o pe 11 5 2 4 DSC call functionality cene atre egeo nemini a alc 12 6 Automated and non automated procedure requirements in Class D DSC equipment 12 6 1 Introduction ico ir reb rr P aO SED eed re rer isa tei ERE E a E ERREUR sages sates 12 6 2 Noncautormated features nicer ite ete eerie
8. sound a distress acknowledgement alarm Any subsequent acknowledgement shall only sound the self terminating alarm 6 4 9 Determining Subsequent communications Always channel 16 6 4 10 Automated tuning Automatic tuning to channel 16 shall occur after transmission of the first distress alert attempt 6 4 11 Cancelling the Distress Alert The distress cancel procedure consists of the cancel operation The cancel operation consists of a DSC cancel a self addressed distress alert acknowledgement followed by a voice cancel on channel 16 Cancellation of a distress alert shall only be possible prior to acknowledgement Selection of the cancellation option during the sending of a distress alert attempt shall stop the transmission as soon as possible but only after any ongoing distress alert within the distress alert attempt is completed The radio shall prompt the operator to confirm that a distress cancel is requested Upon selection of a cancel the self addressed distress alert acknowledgement shall be sent on channel 70 After the transmission of the self addressed distress alert acknowledgment the general receiver and transmitter shall be automatically tuned to channel 16 and the operator shall be prompted to make the voice cancellation Completion of the cancellation shall place the sending distress automated procedure in the acknowledged state 6 4 11 1 Examples of cancel distress displays on VHF equipment In the following set
9. the procedure shall sound an alarm unique to the DSC message type with the two tone sound reserved for the distress alert or relay if it initiates the procedure which shall be manually silenced All subsequent examples of the DSC messages shall only sound the self terminating alarm 6 5 6 Determining Subsequent communications Always channel 16 6 5 7 Automated tuning The tuning shall occur automatically upon reception of a distress DSC message in the following manner a The operator shall have at least a 10 s warning before tuning to channel 16 b The operator shall be able to pause the tuning in case engaged in traffic or accept the tuning c Automatic tuning shall apply in the abscense of any operator action 6 5 8 Acknowledgments The procedure handling all ships distress DSC messages and distress alerts shall be considered acknowledged upon reception of the first distress alert acknowledgement or all ships distress relay acknowledgement A self addressed distress alert acknowledgement sent by the vessel in distress shall be recognized as a self cancel 6 5 9 Termination The procedure can be terminated manually or by the automated timeout At least ten seconds prior to automated termination a visual and discrete aural warning shall be displayed with the option to stop the automatic termination Once the procedure is terminated either by the user or automatic timeout the equipment will automatically display any unread mes
10. the 10 binary bits that make up the coded entities of a transmitted DSC message NOTE The 10 bits consist of a 7 bit symbol that gives the information content and 3 bit error check that gives the number of 0 binary bits in the 7 bit symbol ETSI 10 ETSI EN 300 338 3 V1 1 1 2010 02 3 2 Abbreviations For the purposes of the present document the terms and definitions given in EN 300 338 1 i 2 apply 4 Controls and indicators in Class D DSC equipment 4 1 Visual indication Any visual display of the information content shall be clearly legible under all ambient light conditions 4 1 1 Primary DSC alphanumeric display The display characters shall have a minimum height of 3 5 mm and a nominal character width height ratio of 0 7 The display shall have a minimum of 12 characters per line and a minimum of 32 characters total Any displayed information shall be static Horizontal scrolling techniques are not permitted see clause 4 1 3 The display shall be capable of prompting the operator if an incorrect operation is attempted displaying error messages displaying incoming and logged calls in plain language displaying all the user programmable information content of a DSC call 4 1 1 1 Additional display information Additional display characters or symbols shall be capable of showing the functions and options currently available displaying that unread received DSC calls are present in memory displaying
11. 0 02 6 6 3 1 Examples of sending non distress procedures displays on VHF equipment In figure 3a is a set of example windows that could appear on a display screen during a sending non distress procedure The examples below show windows for a routine call group call and an urgency call Figure 3a Example windows of the sending non distress procedures 6 6 4 Handling received DSC Messages Any received DSC message pertinent to the station but not pertinent to the procedure shall be treated according to clauses 6 9 1 and 6 9 2 DSC messages that are pertinent to the procedure are acknowledgements to the initial DSC message 6 6 5 Alarms The reception of the first acknowledgement pertinent to the procedure shall sound the appropriate acknowledgement alarm as specified in tables C 1 and C 2 Any subsequent acknowledgement may be ignored as only individually addressed non distress DSC messages have acknowledgements 6 6 6 X Automated tuning If the DSC message requires subsequent communications the general receiver and transmitter shall be tuned to the frequencies given in the acknowledgement upon reception of the able to comply acknowledgement If the acknowledgement received is Unable to comply the radio shall not tune to the originally proposed channel If the acknowledgement received is able to comply but proposes a new working channel that is not available the radio shall not tun
12. 01 Degrees of protection provided by enclosures IP Code International Convention for the Safety of Life at Sea 1974 as amended ISO Standard 3791 Office machines and data processing equipment Keyboard layouts for numeric applications ITU R Recommendation M 541 9 2004 Operational procedures for the use of digital selective calling DSC equipment in the maritime mobile service ITU R Recommendation M 689 2 1994 Operational procedures for an international maritime VHF radiotelephone system with automatic facilities based on DSC signalling format ITU R Recommendation M 1082 1 1997 International maritime MF HF radiotelephone system with automatic facilities based on DSC signalling format ITU R Recommendation SM 332 4 1978 Selectivity of receivers ITU T Recommendation E 161 2001 Arrangement of digits letters and symbols on telephones and other devices that can be used for gaining access to a telephone network ITU T Recommendation V 11 1996 Electrical characteristics for balanced double current interchange circuits operating at data signalling rates up to 10 Mbit s IEC 61162 1 2000 Maritime navigation and radio communication equipment and systems Digital interfaces Part 1 Single talker and multiple listeners ITU R Recommendation M 821 1 1997 Optional expansion of the digital selective calling system for use in the maritime mobile service ITU R recommendation M 1080 1994 Di
13. 1 34 Procedure tunes to channel and indicates User receives group call Alarm sounds Not much to do here Link is one way the link is ready for talk User silences alarm Procedure indicates link is ready ALL SHIPS ALL SHIPS URGENCY CALL URGENCY CALL Figure 5 Example windows of the received non distress procedures 6 7 4 Handling received DSC messages DSC messages pertinent to the station but not the procedure shall treated according to clause 6 9 DSC messages that are pertinent to the procedure are repeats of the initial DSC message 6 7 5 Alarms When auto acknowledging position poll and test DSC messages no alarm shall sound ETSI 33 ETSI EN 300 338 3 V1 1 1 2010 02 When auto acknowledging is not involved an alarm shall sound and be terminated as specified in tables C 1 and C 2 All repeat initial DSC messages shall sound the self terminating alarm 6 7 6 Automated tuning If the DSC message requires subsequent communications the general receiver and transmitter shall be tuned to the frequencies of the subsequent communications given in the acknowledgement if acknowledgments are requested Otherwise the general receiver shall be tuned to the frequency of subsequent communication given by the initial DSC message a The operator shall have a 10 s warning prior to any tuning if the new subsequent frequency is different from the current b Theoperator shall be able to pause the tuning in case
14. At this point the DSC phase has accomplished its purpose and linked the vessel in distress to assistance authorities Until the procedure is terminated the procedure remains DISTRESS TRANSMITTING IDISTRESS IDISTRESS IDISTRESS TX IN 9 SECS TRANSMITTING WAIT FOR ACK DISTRESS DISTRESS ACK RECEIVE ACKNOWLEDGED ACKNOWLEDGE ilence Figure 1a Example windows of the sending distress automated procedure at various stages The above examples are only examples They show one means of providing the minimum required information The layout method and choice of text are up to the manufacturer 6 4 4 Dedicated distress button sub procedure The dedicated distress button shall be used for the following purposes in the following manner a Use of the dedicated distress button is required to initiate the sending distress automated procedure b The dedicated distress button shall be used exclusively for initiating the sending distress automated procedure c Use of the dedicated distress button after entering parameters of the alert attempt via a menu or equivalent shall initiate the sending distress automated procedure with the alert attempt as composed by the operator ETSI 19 ETSI EN 300 338 3 V1 1 1 2010 02 d Use of the dedicated distress button without entering parameters of the alert attempt via a menu or equivalent shall initiate the sending d
15. EISI EN 300 338 3 V1 1 1 2010 02 European Standard Telecommunications series Electromagnetic compatibility and Radio spectrum Matters ERM Technical characteristics and methods of measurement for equipment for generation transmission and reception of Digital Selective Calling DSC in the maritime MF MF HF and or VHF mobile service Part 3 Class D DSC CD 2 ETSI EN 300 338 3 V1 1 1 2010 02 Reference REN ERM TG26 066 3 Keywords DSC GMDSS maritime radio ETSI 650 Route des Lucioles F 06921 Sophia Antipolis Cedex FRANCE Tel 4384 9294 4200 Fax 33 4 93 65 47 16 Siret N 348 623 562 00017 NAF 742 C Association but non lucratif enregistr e la Sous Pr fecture de Grasse 06 N 7803 88 Important notice Individual copies of the present document can be downloaded from http www etsi org The present document may be made available in more than one electronic version or in print In any case of existing or perceived difference in contents between such versions the reference version is the Portable Document Format PDF In case of dispute the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat Users of the present document should be aware that the document may be subject to revision or change of status Information on the current status of this and other ETSI documents is available at http portal etsi org tb status s
16. H 26 6 6 3 Display norit eei AEE ES eni eem Een pb RE 27 6 6 3 1 Examples of sending non distress procedures displays on VHF equipment sees 28 6 6 4 Handling received DSC Messages sssessseeseeeeenenen rennen tenete tree teen trennen rene enne enne nnne 28 6 6 5 VAN ea a a MOM En 28 6 6 6 Automated tuning nimc eei pa c rs ERR SENA EE E EES IS e ER IE PE Re Bg 28 6 6 7 Delayed Acknowledgements esses enne enne ieee eap e nenne ene enr eterne enne eroe 29 6 6 8 Termination sth df c RE REI HP RU e ER A vid Ee D Raed S EE Po eed irte 29 6 6 9 WaIDIDgS inet a tii ene AHN oath i AL es ep e NG aye Ae aa o bees 29 6 7 Receiving non distress automated procedure sess nnnm rennen ene 30 6 7 1 Procedure eere eed e ep PO e eit ege e Nee PR ees 30 6 7 2 EL IEEE 31 6 7 3 Display iicet itc tc e a Tee REDIERE Dee tete ee o eee OPE it c eR Pea 31 6 7 3 1 Examples of receiving non distress procedures displays on VHF equipment sess 32 6 7 4 Handling received DSC messages eese ener nennen trennen nein eren erinnerte nnne 32 6 7 5 Alarms Per 32 6 7 6 Automated tuning GI tede ao Uc NI niim eet 33 6 7 7 Acknowledgtients eei ertt ep RE Ucet bet Ne Tete Mie eli E etie OUR UT 33 6 7 8 Terminations a a R A A A a A E E E EN 33 6 7 9 Wat gS ce EHE 34 6 8 Communications automated procedure isrener sessa eene
17. acknowledgement The comply with channel change option shall require that the operator be able to enter select channels before sending The operator shall not be required to compose any other elements of this acknowledgement If an acknowledgement is resent by the operator it shall be identical to the first acknowledgment It shall not be possible to further edit the content 6 7 8 Termination When auto acknowledging position poll and test DSC messages the procedure shall self terminate after sending the acknowledgement When sending an unable to comply acknowledgement the procedure shall terminate after completing the transmission In all other cases termination is done manually or by the automated timeout At least ten seconds prior to automated termination a visual and discrete aural warning shall be displayed with the option to stop the automatic termination Once the procedure is terminated either by the user or automatic timeout the equipment will automatically display any unread messages in memory starting with the message with the highest priority as indicated in clause 6 9 If the procedure is terminated manually by the user then integrated equipment may revert to the channel that was previously selected before the DSC procedure ETSI 34 ETSI EN 300 338 3 V1 1 1 2010 02 6 7 9 Warnings The procedure shall provide warnings for incorrect entered parameters The operator shall have the option to go back to the st
18. age of the procedure where the action was taken that caused the warning 6 8 Communications automated procedure 6 8 1 Procedure The communications automated procedure results when the operator engages in communications established by non DSC means The critical purpose of this simple procedure is to assure that received DSC messages do not interrupt ongoing communications in the same manner that they do not disrupt any of the ongoing automated procedures handling DSC messages The communications automated procedure results when i the radio transmitter has been keyed from the standby condition ii the receiver is activated by the reception of an appropriate signal or lii anew receiver channel has been selected 6 8 2 Tasks The communications automated procedure shall handle the following events a received DSC messages pertinent to the station shall be treated according to clauses 6 9 1 and 6 9 2 b tune the general receiver and transmitter to the frequencies of communication c provide the operator with the option to terminate the procedure 6 8 3 Display During the communications automated procedure the radio shall display or make available to the operator the following items and or information a the fact one is engaged in a communications procedure b the VHF channel in use C the operator options The following information shall be accessible to the operator via a maximum of two menu layers a the station MMSI b
19. al test call Y Y 120 Safety 108 only Individual test call acknowledgement Y Y 120 Safety 108 only Routine group call RT Y Y 114 Routine individual RT call Y Y 120 Routine individual RT ACK Y Y 120 Distress Alert Cancel Y Y 112 This is the self addressed distress ACK If any other calls not listed in the table above are implemented in the device they shall comply with tables 4 1 to 4 10 2 of ITU R Recommendation M 493 12 2 Individual routine category polling and position calls from previous versions of this Recommendation may be implemented for the sake of reverse compatibility Call types marked shall not be available in the equipment Call types marked Y shall be available in the equipment Call types marked N are not required to be available in the equipment Call types marked O are for reverse compatibility with older equipment 6 Automated and non automated procedure requirements in Class D DSC equipment 6 1 Introduction This clause covers the minimum level of software automation operational simplicity and interface consistency requirements for shipborne fixed installations using class D Digital Selective Calling equipment Perhaps the most important issue concerns an implied expectation for the use of the terminology automated procedure as used in the present document to appear in the user interface The terminology automated procedure describes the set of algorithms that are used to encapsulate all the activities n
20. cation or the requested or sent information 5 frequencies of subsequent communication if any 6 whether or not the DSC message requires an acknowledgement ETSI 32 ETSI EN 300 338 3 V1 1 1 2010 02 f the information content of any acknowledgment sent 1 priority 2 the destination 3 the communication frequency or unable to comply and reason or info g displaying the valid user options and h the sub stages of the procedure which are 1 waiting to send acknowledgement 2 transmitting 3 acknowledged 4 waiting for a free channel At top level the elapsed time the stage of the automated procedure and operator options shall be displayed 6 7 3 1 Examples of receiving non distress procedures displays on VHF equipment In the following figure is a set of example windows that could appear on a display screen during a received non distress procedure The examples below show windows for a received routine call group call and an urgency call 456444322 456444322 456444322 CALLING WAITING CALLING SINCE 0 34 SINCE 2 34 REPLYING Silencd s ax Quit Change Info Hold Quit Change Info Hold D hange User receives call Alarm sounds Waiting for user to reply User presses Procedure indicates VHF is transmitting User silences alarm reply button 456444322 099988877 CONNECTED GROUP CALL SINCE 0 34 Quit info Hold Silence 099988877 GROUP CALL CH 6
21. ceiving distress automated procedure is initiated by the reception of the first multi station distress DSC message of a distress event An informative schematic of the outline automated procedure is given in figure 2 INCOMING DSC Multi indiv Yes different Option in 10 seconds for Operator to block No h automatic change to Auto change ioo i keep channel channel 16 Yes Yes Keep channel Make channel change NO Rec DSC an Options ack End Procedure Yes Set acked stage Not acked stage or Rec DSC is first ack End procedure Figure 2 Receiving distress procedure ETSI 6 5 2 23 ETSI EN 300 338 3 V1 1 1 2010 02 Tasks The radio shall follow the received distress automated procedure as shown in figure 2 The received distress automated procedure shall handle the following events a b c d 6 5 3 the sounding of the appropriate alarms for DSC messages pertinent to the procedure logging all DSC messages pertinent to the station but not the procedure to the call log watching for the distress event acknowledgement or recognizing the self cancel providing the operator with the option to end the procedure Display During the received distress automated procedure the radio shall display or make available to the operator the following items and or information a b c d e f g h i the fact one is engaged in receiving a distress the elap
22. e actions such as two levels of menu instructions The operator shall be able to select either Urgency or Safety category and the equipment shall propose the default subsequent working channel of 16 the operator shall have the option to change the working channel ETSI 12 ETSI EN 300 338 3 V1 1 1 2010 02 5 2 4 DSC call functionality The following DSC calls shall be available in the equipment Table 1 CALL TYPE Tx Rx Format specifier Notes Distress alert Y Y 112 TX All natures of distress except EPIRB Distress acknowledgement Y 116 Distress relay RT Individual Y 120 This includes DROBOSE Distress relay RT Geographic area Y 102 Distress relay RT All ships Y 116 Distress relay EPIRB Individual Y 120 Distress relay EPIRB Geographic area Y 102 Distress relay EPIRB All ships Ys 116 Distress relay ACK Individual Y 120 Distress relay ACK RT All ships Y 116 Distress relay ACK EPIRB Y 120 Distress relay ACK EPIRB All ships Y 116 All ships RT call Y Y 116 Urgency 110 and Safety 108 only All ships Duplex RT call O 116 These are FULL duplex calls Urgency 110 and Safety 108 only Individual RT call N Y 120 Urgency 110 and Safety 108 only Individual RT call acknowledgement Y N 120 Urgency 110 and Safety 108 only Individual RT call acknowledgement Y N 120 Urgency 110 and Safety 108 only unable to comply Individu
23. e to the proposed channel but inform the operator that he has to make a new call request to the called station If no acknowledgement is required the transmitter shall be tuned to the frequency of subsequent communications given by the initial DSC message ETSI 29 ETSI EN 300 338 3 V1 1 1 2010 02 6 6 7 Delayed Acknowledgements If an acknowledgement to a sending non distress automated procedure is received after the procedure has been prematurely terminated the automated procedure shall initiate itself recreating the initial DSC message based upon the acknowledgement The procedure shall inform the operator that an acknowledgement we quit waiting for has been received If the acknowledging station responded with Unable to comply acknowledgement it shall display the reason given 6 6 8 Termination Termination is done manually or by the automated timeout At least ten seconds prior to automated termination a visual and discrete aural warning shall be displayed with the option to stop the automatic termination Once the procedure is terminated either by the user or automatic timeout the equipment will automatically display any unread messages in memory starting with the message with the highest priority as indicated in clause 6 9 If the procedure is terminated manually by the user then integrated equipment may revert to the channel that was previously selected before the DSC procedure 6 6 9 Warnings The procedure shall provid
24. e warnings for incorrect entered parameters The operator shall have the option to go back to the stage of the procedure where the action was taken that caused the warning ETSI 30 ETSI EN 300 338 3 V1 1 1 2010 02 6 7 Receiving non distress automated procedure 6 7 1 Procedure The received non distress automated procedure results when a DSC message is received that does not contain the distress information and is not an acknowledgement An informative schematic of the outline automated procedure is given in figure 4 INCOMING DSC Message Relevant to procedure Auto ack and not comms 1 call Sound manual alarm after sound self terminating alarm Options if not acked Unable was able to comply if able transmitted comply with change unable to comply end procedure Remove able option Options if acked resend acknowledgement end procedure Remove unable and comply with change user options Auto ack stage Set event stage acked End procedure Figure 4 Receiving non distress procedure ETSI 6 7 2 31 ETSI EN 300 338 3 V1 1 1 2010 02 Tasks The radio shall follow the received non distress automated procedure as shown in figure 4 The received non distress automated procedure shall handle the following events a b c d e f 6 7 3 sound the appropriate alarms at the appropriate times for DSC messages pertinent to the proced
25. ecessary to perform DSC and non DSC communication events The operator does not need to know anything about the existence of automated procedures in order to operate a radio that makes use of these algorithms Though the present document refers to items such as the Sending Distress Automated Procedure such language shall not appear on the user interface of the equipment ETSI 13 ETSI EN 300 338 3 V1 1 1 2010 02 The primary purpose of DSC signalling is to provide the means to set up subsequent communications between vessels and or coast stations A call may be considered as being the total duration from the start of the DSC signalling until the end of the subsequent communications and the automated procedure is terminated The operational functionality described in the present document has the objective of not disturbing any ongoing call Furthermore the equipment shall assist the operator by providing simple audible indication of a received DSC call whilst the equipment is engaged and if that received DSC call is of a higher priority than the call in progress then the equipment shall be capable of displaying the information of this new call 6 2 Non automated features This clause describes the features of the equipment that are necessary to assure compliance to the ITU R DSC functionality standards and support a smoother operation of the automation algorithms but are not directly related to the automation algorithms 6 2 1 DSC Message
26. edure and if there is already a procedure in the background the user shall be asked what to do one of the following a putthe currently active procedure in the background and initiate the new automated procedure in foreground hence ending the procedure currently parked in background b cancel the acceptance and log the call as unread call in the call log ETSI 38 ETSI EN 300 338 3 V1 1 1 2010 02 Annex A normative DSC message composition A 1 Default values When default parameters are necessary the factory default values shall be as shown in figure A 1 Loading DSC Defaults Is the format editable nie Controller sets Individual see note 1 No Controller sets MMSI or group MMSI to an invalid indicator OR controller sets area to 500 nm centered on ship see note 1 Telecommand editable MDC Controller sets Radio telephone see note 1 No Is the category editable Controller sets Routine or Safety see note 2 Is the comms chan editable No Yes _ gt Yes Controller sets a non distress channel see note 1 Yes gt Is the DSC chan editable Controller sets freq to 2 MHz band see note 1 No Je All other parameters are never editable NOTE 1 Only if the parameter has not already been set by the operator NOTE 2 The default is routine if allowed it is not allowed for area or all ships messages otherwise the default
27. edure is waiting for a distress alert acknowledgement and the radio is tuned for distress traffic on channel 16 The operator has several options to cancel the alert resend the alert before the auto resend timeout pause the countdown to the auto resending and to look at detailed information about the sent alert The info must contain at minimum the distress information Note there is no option to abort the alert the operator must go through the cancel procedure The third figure is four minutes later There may have been voice traffic but no authority has acknowledged the alert The next figure is two seconds later and now the EUT is warning the operator that the distress alert will be automatically resent in 9 seconds The operator could press the pause button to stop the countdown perhaps there is voice traffic at which time the button would say resume or something like that The fifth figure shows the retransmission of the alert and the sixth figure a short time later after the transmission has finished Note the different time to the auto resend in the fifth figure In the seventh figure the distress alert acknowledgement has been received An alarm would sound that needs manual termination and the text bar indicating the alarm information would likely flash or provide some other visual alarm signal The eighth figure shows the acknowledged procedure Note the operator options have changed and the procedure is still tuned for distress traffic
28. eted and displaying a visual indication that the distress alert attempt has been sent 6 4 5 Transmission of the alert attempt The transmission sub procedure of the sending distress automated procedure shall be as follows a the transmission frequency is always channel 70 b the transmission starts c the countdown to the next automated resending of the attempt is started d ifadistress acknowledgement is received the attempt shall cease after completion of any ongoing distress alert within the attempt e five alerts shall be sent without a break between alerts f the extended position information shall be sent only on completion of the 5 alert 6 4 6 Updating position When a distress alert attempt is resent it shall update the position and UTC time of position information 6 4 7 Handling received DSC Messages Prior to acknowledgment of the sending distress automated procedure only the distress acknowledgement describing the same distress event is pertinent to the procedure All other DSC messages shall be ignored and only recorded in the log After the sending distress automated procedure has been acknowledged all DSC messages describing the same distress event are pertinent to the procedure and may be ignored DSC messages not pertinent to the procedure shall be logged ETSI 20 ETSI EN 300 338 3 V1 1 1 2010 02 6 4 8 Alarms The reception of the first distress alert acknowledgement pertinent to the procedure shall
29. f 5 seconds shall be considered part of the same distress alert attempt The information characters assimilated by the automated procedure handling the distress alerts shall be the recorded information characters In other words if any errors in the information characters of a received alert are corrected by the reception of other alerts within the attempt only the corrected version shall be recorded d Aminimum of the twenty most recently sent DSC messages where a distress alert attempt is recorded as a single message e A minimun of the twenty most recently received non distress DSC messages ETSI 16 ETSI EN 300 338 3 V1 1 1 2010 02 6 4 Sending distress automated procedure 6 4 1 Procedure The sending distress automated procedure results when the operator presses the dedicated distress button to send a distress alert attempt An informative schematic of the outline automated procedure is given in figure 1 PUSH DISTRESS BUTTON Distress Button Sub Procedure No procedure v Yes Transmission Sub Procedure with updated position and time of position and default or optional entered distress information Compute time to next attempt Tune radio to channel 16 Options Pause countdown Resend attempt Cancel procedure Enter acked stage and Yes Yes sound ack alarm Received DSC NO DSEBSC Ne Time to next attempt Received DSC Inform if Repeat ack pertinent to from
30. g any amendments applies 1 ITU Radio Regulations 2008 2 ITU R Recommendation M 493 12 2007 Digital selective calling system for use in the maritime mobile service 3 2004 71 EC Commission Decision of 4 September 2003 on essential requirements relating to marine radio communication equipment which is intended to be used on non SOLAS vessels and to participate in the Global Maritime Distress and Safety System GMDSS ETSI 8 ETSI EN 300 338 3 V1 1 1 2010 02 2 2 Informative references The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area For non specific references the latest version of the referenced document including any amendments applies 1 1 IMO Circular MSC Circ 803 Participation of non SOLAS ships in the Global Maritime Distress and Safety System GMDSS 1 2 ETSI EN 300 338 1 Electromagnetic compatibility and Radio spectrum Matters ERM Technical characteristics and methods of measurement for equipment for generation transmission and reception of Digital Selective Calling DSC in the maritime MF MF HF and or VHF mobile service Part 1 Common requirements 3 Definitions and abbreviations 3 1 Definitions For the purposes of the present document the terms and definitions given in EN 300 338 1 i 2 and the following apply acknowledged automated procedure it indicates that the objecti
31. gital Selective Calling system enhancement for multiple equipment installations ETSI 44 ETSI EN 300 338 3 V1 1 1 2010 02 History Document history V1 1 1 December 2008 Public Enquiry PE 20090405 2008 12 06 to 2009 04 06 V1 1 1 December 2009 Vote V 20100130 2009 12 01 to 2010 02 01 ETSI
32. hall display or make available to the operator the following items and or information a the fact one is engaged in sending a non distress DSC message b the elapsed time since sending the initial DSC message prior to acknowledgement or c the elapsed time since being acknowledged once acknowledged or considered acknowledged d the information content of the initial DSC message sent which is 1 2 3 4 5 the type of DSC message description the priority of the DSC message the destination the channel of subsequent communication if any whether or not the DSC message requires an acknowledgement e if acknowledged the information content of the acknowledgement which is 1 2 3 4 5 6 7 the type of acknowledgment description the priority of the DSC acknowledgement the sender to whom the DSC acknowledgement was sent the means of subsequent communication or the requested information if appropriate the frequency change or unable to comply and reason the frequencies of subsequent communication if any f the valid operator options and g the sub stages of the procedure which are D 2 3 4 5 waiting for free channel transmitting waiting for acknowledgement linked for communications procedure done no more to do At top level the elapsed time the stage of the automated procedure and operator options shall be displayed ETSI 28 ETSI EN 300 338 3 V1 1 1 201
33. han the class A B equivalent by the fact that the class D operator has no DSC options Inf see note ACKNOWLEDGED Info NOTE This alarm self terminates in one second After this the option shall disappear Figure 2a Example windows of the received distress automated procedure The above examples are only examples They show one means of providing the minimum required information The layout method and choice of text are up to the manufacturer 6 5 4 Handling received DSC Messages DSC messages pertinent to the station but not the procedure shall be automatically placed in the received call memory and is flagged as an unread call in memory DSC messages that are pertinent to the procedure are all DSC messages concerning the same distress event If the MMSI is unknown DSC messages that are pertinent to the procedure are all DSC messages that have the same distress information format specifier nature of distress and subsequent communication allow updated position and time However individually addressed DSC messages shall simply be logged if engaged in a received distress procedure handling multi station for example all ships area addressed DSC messages or vice versa ETSI 25 ETSI EN 300 338 3 V1 1 1 2010 02 6 5 5 Alarms In a given procedure only the reception of the initial DSC message and the DSC message that first acknowledges
34. handled by the procedure NOTE A DSC message is pertinent to an automated procedure if the set of information characters in the DSC message has the correct values pertinent to the station any DSC message that would start an automated procedure if the transceiver were in standby self terminating alarm short alarm that stops by itself without operator intervention NOTE The purpose of this alarm is to inform the operator that a DSC message is received but it does not require his immediate attention symbol as part of the DSC sentence 7 binary bits of a 10 bit DSC word that have the information content top level means that items buttons or functions are present and visible without requiring any action by the operator such as scrolling opening up menus or removing any obscuring covers etc two tone alarm alarm consisting of a repetition of the 2 200 Hz frequency for 250 ms followed by a 1 300 Hz frequency for 250 ms NOTE This alarm is used for the initiation of the received distress DSC automated procedure urgency alarm alarm consisting of a repetition of the 2 200 Hz frequency for 250 ms followed by 250 ms period of silence NOTE This alarm is used for the initiation of the received non distress DSC automated procedure when the category of the initiating DSC message is urgency watch receiver separate receiver in DSC radios that continuously monitors VHF channel 70 word as part of the DSC sentence used to describe
35. ipd ert it pri re pep eter peii 13 6 2 1 DSC Message CompositiOn 2 erit titer eee p P Tarer EE ee rea b posses ert ete ee n EE Ee 13 6 2 2 Transmission of DSC messages and prioritized wait essesessesseseseeeeeeereneenee eene 14 6 2 3 Ala S 553 uae pre ee RO REO RS eR copies EU ied D pt itp P D beds Uter ess 14 6 3 Standby dp Ern 14 6 4 Sending distress automated procedure 200 ec eeceeceeeceseceecssecsecssecseecseeeaeseaeeeeeseeeseeseessecsaecsaecsaecsaecseseneees 16 6 4 1 Procedure eost rete dedu edad panis 16 6 4 2 Tasks a dein hse sapie lea IUE 17 6 4 3 Display eeu Rn aene hee use eee URS 17 6 4 3 1 Examples of sending distress procedure displays on VHF equipment eee 18 6 4 4 Dedicated distress button sub procedure eee eeceeccesscesecssecssecseecaeecseseeeeeeeeseeseseeseeseesecsaecsaecaecaeeeeeees 18 6 4 5 Transmission of the alert attempt eee eeceescesecesecesecaecsaecsaecseecaeseaeseeeeseesseeeeeseeeesaecsaecsaecsaeeaaeeaeees 19 6 4 6 Updating positon sasin enie eet Ded e EEA R S t e eden ehe RE lee KOT KSEE E y Te 19 6 4 7 Handling received DSC Messages ssssssseeseeseeneeenne enne nent Sree HIKER EErEE KUKR SV Sie 19 6 4 8 Alarms A Ma I RM E E A AE RAISE 20 6 4 9 Determining Subsequent communications essent teen nennen enne enne tenen 20 6 4 10 Automated tuning ore tne Ine estne e e ER eM REOR I Mee Rear e EU neey eS 20 6 4 11 Cancelling the Distress Alert ie
36. ipment shall be designed for continuous operation on channel 70 but the receiver need not operate when the transmitter is in use 5 2 Facilities for coding and decoding of DSC 5 2 1 Call functions The facilities for coding and composition of calls shall be so arranged that it is possible for the operator quickly and precisely to enter a call The types of DSC calls provided in this equipment are specified in clause 5 2 4 The CALL functions shall permit selection of the following functions INDIVIDUAL for making a call to a specific MMSI GROUP for making a call to a specific Group MMSI ALL SHIPS for making all ships calls RECEIVED CALLS for retrieving stored incoming DSC calls OTHER for equipment housekeeping functions 5 2 2 INDIVIDUAL calls The INDIVIDUAL call facility shall permit either the MANUAL entry of a MMSI or the selection of a station from the DIRECTORY list The DIRECTORY list shall have a facility for at least 10 entries Their MMSIs shall be programmable If the called station is a coast station i e MMSI commencing 00 no further information shall be requested from the operator If the called station is a ship station the equipment shall request input of a channel number The equipment shall assist the operator by suggesting a suitable inter ship channel as defined in appendix 18 of the Radio Regulations 1 5 2 3 ALL SHIPS calls It shall be possible to transmit ALL SHIPS calls by means of deliberat
37. is safety This default is to be reset the most recently entered value shall be overwritten when the operator selects the option to compose a non distress DSC message at some later time Figure A 1 Loading DSC defaults ETSI 39 ETSI EN 300 338 3 V1 1 1 2010 02 Annex B normative Automated non distress channel selection algorithm Automated subsequent communications channel selection provides a default channel for the operator for non distress DSC messages requiring subsequent communications based upon a simple algorithm It shall be applied in the absence of any other specialized means of an automated communication setup a b c d e Channel 16 shall not be used as a default for routine category DSC messages If the DSC message is directed toward a ship station a simplex channel shall be used for example channel 6 DSC messages directed toward a coast station shall let the coast station decide position or all 126 s in the frequency parameters of the DSC message DSC messages directed to a group area or all ships shall use the broadcast mode 126 s for the TX channel in the frequency parameters of the DSC message Due to the regional nature of VHF the actual channel number for each vessel may be established as an operator set up option The automated channel frequency selection shall be able to be overridden which will be necessary to select a distress channel for subsequent communications ETSI A
38. istress automated procedure with the default alert attempt The default alert attempt is given by the following 1 undesignated nature of a distress 2 the latest position of the vessel 3 the UTC time of that position 4 radio telephone for subsequent communication Use of the dedicated distress button without entering parameters of the alert attempt via a menu or equivalent shall initiate the sending distress automated procedure with the default alert attempt regardless of the state of the radio except when the radio is already engaged in the sending distress automated procedure The distress button sub procedure of the sending distress automated procedure shall be as follows a lifting of the spring loaded lid or cover permanently attached to the equipment by for example hinges This is ACTION 1 b pressing and holding the distress button ACTION 2 while i displaying the seconds remaining to transmission of the attempt starting at three and i invoking an intermittent audio and intermittent visual alarm once each second c ifthe distress button is released before the three seconds have elapsed stop the procedure when releasing the button the radio shall return to its previous state d when the three seconds have elapsed regardless of whether the button is continued to be held down or released completes ACTION 2 and the alert attempt is started e sounding a steady tone of two second duration after ACTION 2 has compl
39. mated procedure from the stored information c ifthe equipment is designed with the option to handle a background non terminated automated procedure optional display the updated stage of the automated procedure i the operator shall now have the option to activate the displayed automated procedure or i leave the displayed procedure in the list of non terminated automated procedures on hold 6 9 2 5 Putting automated procedures on hold optional If the equipment is designed with the option to handle a background non terminated automated procedure it shall be possible for the operator to put the current active automated procedure on hold by selecting e g pause or hold The user may also achieve this by accepting a higher priority call as described in clause 6 9 2 1 1 ETSI 37 ETSI EN 300 338 3 V1 1 1 2010 02 6 9 2 6 Controlling non terminated automated procedures optional Only one automated procedure can be active at a time since there is only one transmitter and general receiver in addition to the watch receiver thus any action to activate the background automated procedure on hold inactivates the currently active automated procedure and vice versa A background automated procedure on hold shall not react to incoming calls unless accepted by the operator either by accepting a higher priority call clause 6 9 2 1 1 or terminate the current active procedure clause 6 9 2 4 thus a theonly operator options which a
40. ment shall provide an automatic determination of the channel and or frequencies of subsequent communication according to the algorithm given in ITU R Recommendation M 493 12 2 annex 3 and summarized in annex B The automated channel selection shall be able to be overridden It shall not be possible to select a distress channel for subsequent communications for DSC messages of priority routine The equipment shall automatically set the dot pattern length to 20 bits for all transmitted DSC messages ETSI 14 ETSI EN 300 338 3 V1 1 1 2010 02 6 2 2 Transmission of DSC messages and prioritized wait If the channel is free the transmission shall begin immediately If the channel is not free and the DSC message is a distress alert the alert shall be transmitted as soon as the channel becomes free or after 1s which ever occurs first The 1 s value is approximate average duration of a VHF DSC message For all other DSC messages the equipment shall wait for the channel to become free and then the equipment shall delay transmission of the DSC message for a specified wait time The specified wait time shall depend upon the message type and priority Distress DSC messages except for alerts urgency safety routine and test DSC messages shall wait one two three and four fixed units of time plus a random addition described below respectively before attempting to transmit Transmission occurs if and only if the channel is still free after
41. mes the situation is satisfied ETSI 41 ETSI EN 300 338 3 V1 1 1 2010 02 Event Sound Increase Shutdown When aural is required Position older than 23 5 hours warning No man Only if older than 4 hours alarm has been silenced Pressing the dedicated count No At all times the situation is satisfied distress button GEEF NOTE 1 Only when the event occurs due to the reception of a DSC message NOTE 2 The distress priority has been a source of great confusion It is not a distress alert but a non distress DSC message with the priority distress which is no longer allowed in the latest version ITU R Recommendation M 493 12 2 The distress priority non distress DSC message has no distress information is sent as a single DSC message on a single frequency and all subsequent communication information is given explicitly in the message Like any other non distress DSC message in the old recommendation it could be addressed to an individual a group an area or all ships and have one of several possible telecommands C 2 Alarming with critical errors If an automated procedure is initiated by a DSC message with critical errors errors in the information symbols such that the procedure cannot take any action such as generating acknowledgements the alarm shall self terminate The sound of the alarm shall be that it would have had if the DSC message were received without critical errors The ala
42. multipart deliverable that covers the requirements to be fulfilled by equipment that is either integrated with a transmitter and or a receiver or equipment that is a stand alone DSC terminal These requirements include the relevant provisions and the guidelines of the IMO as detailed in MSC Circ 803 1 1 for non SOLAS vessels participating in the GMDSS as well as Commission Decision of 4 September 2003 2004 71 EC 3 2 Heferences References are either specific identified by date of publication and or edition number or version number or non specific For a specific reference subsequent revisions do not apply Non specific reference may be made only to a complete document or a part thereof and only in the following cases if it is accepted that it will be possible to use all future changes of the referenced document for the purposes of the referring document for informative references Referenced documents which are not found to be publicly available in the expected location might be found at http docbox etsi org Reference NOTE While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity 2 1 Normative references The following referenced documents are indispensable for the application of the present document For dated references only the edition cited applies For non specific references the latest edition of the referenced document includin
43. nfigurable alarm sounds Fixed Alarm sounds Frequency Hz Frequency Hz Duration ms Duration ms Tone 1 Tone 2 Tone 1 Tone 2 two tone see note 2 200 1 300 250 250 distress ack see note 2 200 1 300 500 500 Urgency see note 2 200 Silence 250 250 urgency ack see note 2 200 Silence 500 500 Count 2 000 Silence 500 500 NOTE The two tone distress ack urgency and urgency ack alarms shall not be able to be customized These alarms are continuously repeated until manually terminated ETSI 42 ETSI EN 300 338 3 V1 1 1 2010 02 C 4 Recommended alarm sounds The manufacturer may implement alarm sounds for the following events Routine calls and routine acknowledgement calls Safety calls and safety acknowledgement calls Warnings Discrete alarms Self terminating alarms Alarms may be repeated as long as it is pertinent to the procedure and awaiting user interaction unhandled It is recommended the alarms are selected within an audible frequency range of 300 Hz to 3 300 kHz The manufacturer is encouraged to implement an option to disable alarms except from those defined in table D 2 ETSI 43 ETSI EN 300 338 3 V1 1 1 2010 02 Annex D informative Bibliography ETSI TR 100 028 1 2001 Electromagnetic compatibility and Radio spectrum Matters ERM Uncertainties in the measurement of mobile radio equipment characteristics Part 1 IEC 60529 ed 2 1 20
44. ng the valid operator options which are 1 terminating the automated procedure Display During the sending distress automated procedure the radio shall display the following items and or information as appropriate at top level a b c d e the fact one is engaged in sending a distress the distress information a warning before the automated resending of the attempt in case engaged in traffic the MMSI of the sender of the distress acknowledgement the sub stages of the procedure 1 transmitting 2 waiting for acknowledgement 3 alert acknowledged and the valid operator options ETSI 18 ETSI EN 300 338 3 V1 1 1 2010 02 During the sending distress automated procedure the radio shall make the following items and or information accessible to the operator from top level a thetime remaining to the next automated resending of the attempt prior to acknowledgement b the elapsed time since receiving the distress alert acknowledgement after acknowledgment 6 4 3 1 Examples of sending distress procedure displays on VHF equipment In the following set of figures examples are shown of windows that could appear on a display screen during a sending distress automated procedure at various stages during the event The first figure is what might appear after the operator holds down the dedicated distress button for 3 or more seconds The second figure shows the window after the alert attempt has completed The proc
45. nnex C normative Alarms C 1 40 Alarm specifications ETSI EN 300 338 3 V1 1 1 2010 02 Table C 1 summarizes the alarm characteristics required by the radio The Event is the reason for the alarm The sound specifies the default audio character of the alarm whose detailed characteristics are specified in table C 2 The increase specifies whether or not the alarm shall increase in volume over the first 10 s The shutdown specifies whether the alarm shall be terminated manually man may be silenced automatically auto or automatically if the situation causing the alarm is corrected corr Manual silencing of alarms is always an option The when aural required column specifies the conditions under which the aural alarm is mandatory In the event that an alarm is not cancelled manually then automatic cancellation shall take place after 2 minutes It is assumed in table C 1 that any references to received DSC messages refer only to messages implicitly or explicitly addressed to the station Table C 1 Alarm characteristics Event Sound Increase Shutdown When aural is required Initiating a received Only if within 500 nm of the vessel in distress or if distress automated two tone Yes Man from north of 709N or south of 70 S otherwise alarm procedure see note 1 self terminates id ai Only if within 500 nm of the vessel in distress or if automated procedure distress ack No Man from nor
46. o the existence of other IPRs not referenced in ETSI SR 000 314 or the updates on the ETSI Web server which are or may be or may become essential to the present document Foreword This European Standard Telecommunications series has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters ERM The present document is part 3 of a multi part deliverable covering Digital Selective Calling DSC as identified below Part 1 Common requirements Part 2 Class A B DSC Part 3 Class D DSC Part 4 Class E DSC The present document covers the operator interfaces and operating system for Class D DSC equipment National transposition dates Date of adoption of this EN 1 February 2010 Date of latest announcement of this EN doa 31 May 2010 Date of latest publication of new National Standard or endorsement of this EN dop e 30 November 2010 Date of withdrawal of any conflicting National Standard dow 30 November 2010 ETSI 7 ETSI EN 300 338 3 V1 1 1 2010 02 1 Scope The present document states the minimum requirements for general communication for shipborne fixed installations using DSC class D Class D DSC is intended be used in the Very High Frequency VHF band of the Maritime Mobile Service MMS for distress urgency and safety communication and general communications using telephony for subsequent communications The present document is part 3 of a
47. of figures examples are shown of windows that could appear on a display screen during a sending distress automated procedure when the cancel operation is done The first figure shows the sent distress procedure after the transmission The operator presses the cancel button The second figure shows the warning with the option to continue or to back out The operator chooses to continue The third figure shows the start option which still gives the operator the option to back out The operator select start The fourth figure shows the DSC phase of the cancel the self addressed distress acknowledgement which lasts only about 0 7 seconds on VHF The fifth figure shows the start of the voice cancel which provides a brief explanation to the operator The only choice is to proceed and in the sixth figure the EUT provides the text of the voice cancel message that the operator can read Upon completion of the voice cancel the operator returns to the distress procedure in its acknowledged state Note that the operator does have the option to repeat the procedure perhaps instructed to do so by a coast station That action would bring the operator back to the fourth figure However once the finish option is selected no further DSC cancels can be sent The seventh figure shows the return to the sending distress procedure now in its acknowledged state Further communications may continue ETSI 21 ETSI EN 300 338 3 V1 1 1 2010 02 DISTRESS WARNING
48. ory starting with the message with the highest priority as indicated in clause 6 9 6 9 Handling incoming calls while the equipment is engaged 6 9 1 Procedure This clause describes the handling of received DSC messages that are pertinent to the station while the radio is engaged 6 9 2 Tasks If the radio is engaged in handling an automated procedure received DSC messages that are pertinent to the station but not the currently active automated procedure are handled as described in this clause The equipment may be designed with the option to handle a single background non terminated automated procedure Clauses 6 9 2 5 and 6 9 2 6 shall only apply to such equipment 6 9 2 1 Higher priority calls DSC calls are prioritized according to table 2 Table 2 Priority of DSC calls Priority Call type Highest Own Distress Alert Other Distress message most recent Other Distress message oldest All Ship Distress Ack All Ship Distress Relay All Ship Distress category Individual Distress category All Ships Urgency Individual Urgency All Ships Safety Individual Safety Individual Routine Lowest Communication initiated by other means than DSC If the equipment is engaged on a call and a DSC call is received with a higher priority than the current call the equipment will display the call information of the new call and present the operator with the following options a accept the call
49. other visual alarms displaying whether the position and time information is automatically entered or manually entered For integrated equipment there shall be additional display characters and symbols as required for displaying channel designator and other radio parameters Where logic flows and procedural guidance expressed by graphical symbols have an advantage over text this shall be allowed Any graphical symbols shall be clearly defined in the operation manual 4 1 2 Display requirements for additional controllers Where the additional controller is a fixed installation it shall have exactly the same characteristics as the primary controller including the display Where the additional controller is a handheld device it shall have exactly the same characteristics as the primary controller except for the display which may be scaled down for a minimum character height of 2 mm ETSI 11 ETSI EN 300 338 3 V1 1 1 2010 02 4 1 3 Handling visual information In case all information or user options required for the active automated procedure cannot be contained on a single screen means shall be available to inform the user a that more information is available b how to select the relevant information not yet displayed e g by means of a next button or info key 5 Technical requirements 5 1 Facilities for DSC transmission and reception 5 1 1 Watch receiver capabilities The watchkeeping receiver part of the DSC equ
50. parameters of the distress information the MMSI of the vessel in distress and the nature of distress engaged used to indicate that the equipment is busy handling an automated procedure factory default default value that is set by the manufacturer such that the field or behaviour is defined prior to any operator intervention ETSI 9 ETSI EN 300 338 3 V1 1 1 2010 02 general receiver receiver part of the transceiver used for the reception of all subsequent communications NOTE Itis important to distinguish this unit from the watch receiver information characters set of symbols in a DSC message that contains the items of interest for the recipient and is used to compute the ECC symbol that terminates the message NOTE These symbols are repeated in the DX RX time diversity pattern initial DSC message DSC message that starts an automated procedure non distress DSC message DSC messages or acknowledgments that do not have the format specifier or category of distress objective when in reference to a DSC message or automated procedure the goal or intent of the item NOTE Usually this goal or intent is to establish subsequent communications or request information operator options any choices the operator can make while the automated procedure is engaged pertinent to the automated procedure expression used primarily with reference to DSC messages to indicate that the message has something to do with the procedure and is therefore
51. re available are those that do not require use of the transmitter or general receiver such as to terminate or activate the automated procedure b any subsequent tunings of the transmitter and general receiver that would occur if the procedure were active upon reception of a DSC message appropriate to the procedure shall not occur until the procedure is activated by the operator c the display of the background automated procedure on hold may be requested by a simple button press or selection and may be represented by a labelled icon d all other features including handling of the alarms and full display of information at the request of the operator remain The operator shall be able to activate the displayed background automated procedure on hold by a single action a button press or selection unless the currently active procedure is transmitting thus recreating all information required for continuing the selected automated procedure e g voice frequency If the only automated procedure present on the equipment is a background procedure on hold and incoming or unread calls calls will initiate automated procedures handling test polling or position requests and these procedures are setup to auto acknowledge the equipment shall successively perform the auto acknowledgement and terminate these procedures If the operator accepts a call that is not pertinent to the active procedure and if the new call will initiate a new automated proc
52. read call in memory A discrete audible alarm will sound A visual indicator for unread received calls is activated The radio will not change to any channel specified in the new call If the equipment is designed with the option to handle a background procedure received calls that are pertinent to the background procedure may update the stage of that procedure without alerting the operator A discrete audible alarm will sound A visual indicator is shown indicating the background procedure has been updated The radio will not change to any channel specified by the procedures stage until the procedure is activated by the operator 6 9 2 3 Termination of automated procedures While the operator is engaged in an automated procedure different from an unacknowledged sending distress procedure he can chose to terminate the call The mean shall be clearly identified e g display guided button press It may also be automatic if a microphone hanger switch or handset switch is used and the operator is engaged in subsequent communication 6 9 2 4 Action after termination of an automated procedure Once the operator has confirmed the termination of the current procedure as in clause 6 9 2 3 the equipment shall a ifnounread calls are stored in the memory enter standby mode b automatically display any unread calls in memory starting with the call with the highest priority as indicated in table 2 thus initiating and activating the appropriate auto
53. rior to sending ETSI 15 ETSI EN 300 338 3 V1 1 1 2010 02 The following configuration options for acknowledgements and timers shall be available with the following factory defaults a b c d e f g the option to auto acknowledge test DSC messages set to on the option to auto acknowledge individually addressed non distress DSC messages set to off see clause 6 7 7 the option to set the no activity timeout to exit any non automated procedure activity to some value that includes no timeout set to 10 min the option to set the no activity timeout of non distress DSC automated procedures to some value that includes no timeout set to 15 min the option to set the no activity timeout of received distress DSC automated procedures to some value that includes no timeout set to no timeout that there is no option to set any timeout of the unacknowledged sending distress automated procedure the option to set the no activity timeout of communications automated procedures to some value in the range 10 s to 10 min set 30 s A record of the DSC activity shall be available containing the following information which shall be able to be displayed a The UTC time of reception and date if available b The information content of the DSC message c A minimun of the twenty most recently received DSC distress alert attempts and DSC messages with the category distress DSC alerts received within a period o
54. rm specified in table C 1 perhaps requiring manual termination shall be delayed until that time the reception of subsequent or repeat DSC messages allows the procedure to correct the critical errors C 3 Default alarm sounds The accuracy of the tones and durations specified in the table are not critical since they are for the human ear and not electronic detection Nevertheless the error shall not be more than 5 in frequency and time The waveforms may be sinusoidal square triangular sawtooth or any other form as long as the fundamental tone is clearly recognizable The two tone and urgency alarms of table C 2 shall initially be of a power that is clearly distinguishable but not interfere with radiotelephone communications If not manually cancelled within 10 s the power shall start to rise to a level of at least 80 dB A within the next 10 s at a distance of 1 m from the equipment The count alarm of table C 2 shall have a power level of at least 80 dB A at a distance of 1 m from the equipment All other alarms clause C 4 shall be of an audio level or of a final level when appropriate that is clearly distinguishable but not interfere with radiotelephone communications The operator shall be unable to neither customize the two tone distress acknowledgment urgency and urgency acknowledgement alarms of table C 2 nor use these alarms for other purposes Alarms for other purposes are specified in clause C 4 Table C 2 Non co
55. s shown in figure 3 The sending non distress automated procedure shall handle the following events a prior to acknowledgement 1 the transmission of the composed selected DSC message 2 ifthe DSC message demands no acknowledgment setting the procedure to acknowledged 3 ifthe DSC message demands an acknowledgement 1 waiting for the acknowledgement and alarming when received ii any received DSC message pertinent to the station but not the procedure shall be treated according to clauses 6 9 1 and 6 9 2 iii providing the valid operator options which are resend the initial DSC message terminate the procedure b upon reception of an able to comply acknowledgement or being set to acknowledged 1 tuning the general receiver and transmitter to the frequency of subsequent communication or displaying the requested information 2 ignoring any received DSC message pertinent to the procedure since it is a duplicate ETSI 3 4 27 ETSI EN 300 338 3 V1 1 1 2010 02 any received DSC message pertinent to the station but not pertinent to the procedure shall be treated according to clauses 6 9 1 and 6 9 2 providing the valid operator options which are 1 resend the initial DSC message if it requires no acknowledgement ii terminate the procedure c upon reception of an Unable to comply acknowledgement it shall display the reason given 6 6 3 Display During the sending non distress automated procedure the radio s
56. sages in memory starting with the message with the highest priority as indicated in clause 6 9 If the procedure is terminated manually by the user then integrated equipment may revert to the channel that was previously selected before the DSC procedure 6 5 10 Warnings The procedure shall provide warnings for incorrect entered parameters The operator shall have the option to go back to the stage of the procedure where the action was taken that caused the warning 6 6 Sending non distress automated procedure 6 6 1 Procedure The sending non distress automated procedure results when the operator selects to transmit a DSC message that does not contain the distress information It also results when an acknowledgement to a sending non distress automated procedure that has been prematurely terminated is received an acknowledgement one quit waiting for An informative schematic of the outline automated procedure is given in figure 3 ETSI 26 ETSI EN 300 338 3 V1 1 1 2010 02 Select to Send DSC Message Transmit DSC message Require ack Enter acked stage Tune radio for comms or display information Present Options Resend DSC unless ack received gt j On hold activate End Procedure Receive DSC Pertinent to proc Log DSC message End Procedure Figure 3 Sending non distress automated procedure 6 6 2 Tasks The radio shall follow the sending non distress automated procedure a
57. same proc o Options End station Log DSC otherwise End procedure procedure Figure 1 Sending distress procedure ETSI 6 4 2 17 ETSI EN 300 338 3 V1 1 1 2010 02 Tasks The radio shall follow the sending distress automated procedure as shown in figure 1 The sending distress automated procedure shall handle the following events a b c 6 4 3 the distress button sub procedure prior to this procedure being acknowledged 1 the transmission of the alert attempt 2 calculating the time to an automated resending of the attempt random between 3 5 min and 4 5 min 3 tuning to the subsequent communication frequency upon conclusion of the attempt 4 waiting for the reception of a distress alert acknowledgement 5 logging all other received DSC messages assuring they do not disrupt the procedure 6 retransmission of the alert attempt occurs after the calculated resend timer expires 2 7 providing the valid operator options which are i pausing the countdown to automated resending ii resending the alert attempt with the last entered other parameters using the dedicated DISTRESS button ii cancelling the alert attempt after reception of the acknowledgement 1 stopping the automatic resending of the alert attempt 2 transmitting any remaining single alert of the attempt to completion 3 log received DSC messages not pertinent to the procedure in the appropriate call log 4 providi
58. sed time since the procedure started prior to acknowledgment the elapsed time since acknowledgement after acknowledgment the latest distress information MMSI of vessel in distress nature of distress position time of position the type alert relay alert acknowledgement relay acknowledgement sender and intended destination individual area all ships of the latest received DSC message at least a 10 seconds warning before any automated change in communications frequencies are invoked in case engaged in traffic displaying the valid user options the ability to display information about the history of at least the received DSC messages pertinent to the procedure and the sub stages of the procedure which are 1 waiting for acknowledgement 2 cancelled 3 acknowledged At top level the elapsed time the stage of the automated procedure and operator options shall be displayed ETSI 24 ETSI EN 300 338 3 V1 1 1 2010 02 6 5 3 1 Examples of received distress procedure displays on VHF equipment In the following set of figures examples are shown of windows that could appear on a display screen during a received distress automated procedure at various stages during the event The first figure show the reception of the distress alert where the operator must silence the two tone alarm The display concerning the alarm text should also be flashing or providing some type of visual alarm The second figure shows the proced
59. sseccssscssessssssessssssscees 38 A Default values i ta ete e eet eie RE ated sn asta i T Sues rea Rege eee vances 38 Annex B normative Automated non distress channel selection algorithm 39 Annex C normative PR VAPING M M iresi 40 CT Aliri specifications 5c recreo ete te ee trece ta ate re ae node ee rod te Recette EP ecole 40 C2 Alarming with critical errors etc Gee PU HERR HELLE PEE CURRUS PEE CERE LEM ER eI CERE H Eee g enn 41 3 Detault alarm soutnds oe dE E ORE e ER d de s 41 CA Recommended alarm sounds iri terne edi ree et epe eaten eee es 42 Annex D informative l luitmacjn de 43 ETSI 5 ETSI EN 300 338 3 V1 1 1 2010 02 THISCOLY PE E 44 ETSI 6 ETSI EN 300 338 3 V1 1 1 2010 02 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI The information pertaining to these essential IPRs if any is publicly available for ETSI members and non members and can be found in ETSI SR 000 314 Intellectual Property Rights IPRs Essential or potentially Essential IPRs notified to ETSI in respect of ETSI standards which is available from the ETSI Secretariat Latest updates are available on the ETSI Web server http webapp etsi org IPR home asp Pursuant to the ETSI IPR Policy no investigation including IPR searches has been carried out by ETSI No guarantee can be given as t
60. tatus asp If you find errors in the present document please send your comment to one of the following services http portal etsi org chaircor ETSI support asp Copyright Notification No part may be reproduced except as authorized by written permission The copyright and the foregoing restriction extend to reproduction in all media European Telecommunications Standards Institute 2010 All rights reserved DECT PLUGTESTS UMTS TIPHON the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members 3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners GSM and the GSM logo are Trade Marks registered and owned by the GSM Association ETSI 3 ETSI EN 300 338 3 V1 1 1 2010 02 Contents Intellectual Property Rights em ettet evens et e e e eet eee teet 6 OTE WOLG MD ES 6 1 NI MT PR 7 2 References ohn 226 M EE sadetuete duties pers 7 2 1 Normative references condam ee ih Bets er i ieee ee Re i ee EE A EEEE en eis 7 2 2 Informative references nire et pen ie reo ee ie tee be 8 3 Definitions and abbreviations i 1 itin tenter eire ete Re e EC e REEL a E E 8 3 1 Definitions 2 rete eO DID DERE RE r EE T PEETRE ES EEr E E 8 3 2 Abbreviations
61. th of 709N or south of 70 S otherwise alarm self terminates see note 1 Acknowledging a sent distress automated distress ack No Man Always procedure see note 1 rx DSC message not M ad s nt silence ps ME Bs vx DSC message is only oe alarm of any type is distress automated ppy ppy require procedure Initiating a received e urgency non distress omn Yes Man Always when T Pay of the bos distress DSC automated procedure alarm message is distress see note 2 or urgency Acknowledging asort Urgency ack Always when the priority of the non distress DSC urgency non distress No Man Ai alarm message is distress see note 2 or urgency automated procedure Initiating all other priority non distress automated routiniecalarm Yes Auto When the priority of the non distress DSC message procedures is safety routine ships business or unknown see note 1 Acknowledging all other Pee priority sent non distress routine ack No Auto When the priority of the non distress DSC message alarm is safety routine ships business or unknown automated procedures rx DSC message self pertinent to an ongoing terminating No Auto Always automated procedure alarm Auto termination of procedures too many discrete No auto Always procedures No own MMSI warning No auto Only on equipment power up Automatic positioning Warin No Man gorr Only if configured for auto position updating and info ceases 9 has not been received for 10 minutes iip d tman warning No man At all ti
62. the latest position of the vessel c the UTC time of that position 6 8 4 Handling received DSC Messages All received DSC messages pertinent to the station shall be treated according to clauses 6 9 1 and 6 9 2 6 8 5 Tuning of the general receiver and transmitter The procedure shall automatically tune the general receiver and transmitter to the frequencies of the selected channel ETSI 35 ETSI EN 300 338 3 V1 1 1 2010 02 6 8 6 Termination A procedure started according to clause 6 8 1 bullet i may be terminated automatically by means of a microphone hanger switch or handset cradle switch Otherwise it shall be either be terminated manually or via an automatic timeout At least ten seconds prior to automated timeout a visual and discrete aural warning shall be displayed with the option to stop the automatic termination A procedure started according to clause 6 8 1 bullet ii shall be either be terminated manually or via an automatic timeout At least ten seconds prior to automated timeout a visual and discrete aural warning shall be displayed with the option to stop the automatic termination A procedure started according to clause 6 8 1 bullet iii shall be automatically terminated after default 30 seconds if the receiver is not activated by the reception of an appropriate signal Once the procedure is terminated either by the user or automatic timeout the equipment will automatically display any unread messages in mem
63. this wait time has elapsed otherwise the process is repeated The fixed unit of time shall be 50 milliseconds The randomly generated component shall be some positive integer with resolution in milliseconds between zero and the fixed interval The randomly generated part of the wait time shall be recomputed for every transmission attempt 6 2 3 Alarms Alarms shall have both a visual and aural component Any alarm that initiates for the purpose of getting the operator s attention shall provide the reason for and means to terminate the alarm Alarms shall be initiated for the reasons given in table C 1 The means to terminate the alarms are given in table C 1 The two tone and urgency sound alarms shall not be able to be disabled Those aural alarms are given by table C 2 Alarms for other calls are specified in clause C 4 6 3 Standby NOTE Standby is the state of the equipment when it is not engaged in a communications or DSC automated procedure The following functions and or information shall be available to the operator at top level while in standby a the dedicated distress button b aclearly labelled means to compose send a non distress DSC message The following functions and or information shall be accessible to the operator via a maximum of two menu layers a the station MMSI b the latest enhanced position of the vessel c the UTC time of that position d aclearly labelled means to compose a distress alert p
64. ure received DSC messages pertinent to the station but not the procedure shall be treated according to clauses 6 9 1 and 6 9 2 denote the procedure as acknowledged if the DSC message requires no acknowledgement provide and compose the acknowledgement options as dictated by the initial DSC message tune the general receiver and transmitter to the frequencies of subsequent communications when and if required provide the operator with the option to 1 prior to acknowledgment i comply if able ii comply with frequency change if there are communications iii unable to comply iv end the procedure 2 after acknowledgement or being considered acknowledged i resend the acknowledgment after sending the first acknowledgment ii end the procedure Display During the received non distress automated procedure the radio shall display or make available to the operator the following items and or information a b c d e the fact one is engaged in receiving a non distress DSC message the elapsed time since the procedure started prior to acknowledgment or the elapsed time since acknowledgement after acknowledgment at least a 10 s warning before any automated change in communications frequencies are invoked in case engaged in traffic the information content of the received DSC message 1 priority category 2 the sender 3 to whom the DSC message was sent format and MMSI 4 means of subsequent communi
65. ure after silencing the alarm The radio is tuned to channel 16 displayed on radio section of the display and is open for traffic and the procedure is waiting for a distress alert acknowledgement The third figure shows the reception of a distress relay concerning this distress event An alarm sounds but it is self terminating The message must still provide a means to silence it and it must flash or provide some type of visual alarm The operator can press info to view the details of the latest received DSC message pertinent to this event The fourth figure shows the procedure after the alarm terminates The procedure is still waiting for the DSC acknowledgement and is still tuned to channel 16 The fifth figure shows the reception of a repeat distress alert attempt by the vessel in distress This attempt could have happened automatically or been done by the operator on the vessel in distress However this time only the self terminating alarm sounds The sixth figure shows continuation of the procedure after the alarm terminates The seventh figure shows the reception of the distress alert acknowledgement This time the alarm must be manually silenced The eighth figure shows the received distress procedure upon silencing the alarm The DSC phase is done Note that the operator has the option to exit the procedure place it on hold optional or get further information at any time during the event The class D received distress procedure is much simpler t
66. ve of the initial DSC message has been achieved active automated procedure which has control of the general receiver and transmitter and is thus able to engage in subsequent communications and receive DSC messages on both the watch receiver and general receiver automated procedure set of actions necessary to complete the objective of an initiating DSC message or non DSC communication event NOTE 1 Four DSC automated procedures are designed to process these They are the receiving of distress DSC messages the receiving of non distress DSC messages the sending of distress DSC alert attempts and the sending of non distress DSC messages In addition a fifth procedure is designed to handle non DSC communication events NOTE 2 These automated procedures are called received distress automated procedure sending distress automated procedure received non distress automated procedure sending non distress automated procedure communications automated procedure class D intended to provide minimum facilities for VHF DSC distress urgency and safety as well as routine calling and reception not necessarily in full accordance with IMO GMDSS carriage requirements for VHF installations default value selected or an action taken by the equipment software in the absence of any operator input distress DSC message DSC message or acknowledgement containing the distress information distress event unique distress situation identified by two

EN 300 338-3 - V1.1.1 - Electromagnetic compatibility and

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