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Maintenance Document No. 4 - March 2004

1. butthey will be made if necessary Details of amendment precedures the amendment process are given in 1 2 4 below The current editions of the Colour amp Symbel Specitications S52 App 2 remain in force until the issue of either a an immediate correction which is essential for reasons of safety of navigation or b a new edition which is identified as bringing outstanding deferred amendments into force Either of these will result in a new edition of the Colour amp Symbol Specifications and or the Presentation library whichever is affected Amendments will be sassedtothe manufacturer distributed as described in section 1 2 4 for information or for implementation As noted above immediate correction amendments may have to be issued under certain circumstances The manufacturer should implement any immediate corrections in all his ECDIS systems fitted onboard ship atthe first convenient port call as soon as possible When an amendment is implemented in a type approved ECDIS the manufacturer should inform the type approval authority in case re testing may be required Amendment Procedures Definitions There are three classes of amendments specifications _in_this section_refers_to_the Colour amp Symbol_Specifications and or_the D i 1 2 4 1 i Clarification an improvement to the wording of the specifications S52 App 2 which does not result in any substantive change to the specifications A substant
2. 3 but may not be provided for succeeding editions And revise section 1 2 3 to read as follows 1 2 3 Amending the Colour amp Symbol Specifications and the Presentation Library 1 2 3 1 It is inevitable that amendments to the Colour amp Symbol Specifications and the Presentation Library will be required as further testing is done and as sea experience accumulates ECDIS manufacturers should keep in mind that ECDIS is a new and developing aid to navigation If it is to achieve its full potential it must be capable of changing to meet the mariner s evolving requirements The ECDIS should be designed with enough flexibility to adapt to necessary and significant further developments with future editions of the Colour amp Symbol Specifications S52 App 2 C amp S MD4 March 2004 1 2 3 2 1 2 3 3 1 2 4 1 2 4 1 1 2 4 1 1 1 2 4 1 2 1 2 4 1 3 In the life of each edition of the Colour amp Symbol Specifications S52 App 2 amendments to the structure of the Presentation Library which might affect the ECDIS software for example changing the number of fields in the look up tables or changing the logic of a conditional symbology procedure will be avoided as far as possible Amendments However incremental changes to detail in the Colour amp Symbol Specifications and the Presentation Library may will be required frem the start In a new edition major revision changes in structure wit again be aveided whenever possible
3. 4 Edition revision Edition number of the C amp S Specs and the PresLib The edition revision edition number of a specification the C amp S Specs or the PresLib is of the form mm n where mm is the edition number and n is an sequential revision incremental change number which increases by one for every immediate amendment applied The edition reision number does not change for a deferred amendment Major revisions of the C amp S Specs and the PresLib will be identified by an increment in the mm number followed by a zero i e 04 0 05 0 etc Smaller revisions involving immediate amendments and also revisions which are not major but bring outstanding deferred amendments into force will be identified by an increment in me n humbe e g 04 1 04 2 etc It should be possible to identify the edition number in use on the ECDIS Edition revision numbers refer only to the specifications that is to the Colour amp Symbol Specifications feurrentlyed ev 4 0 and to the Presentation Library teurrentty_ed ev 3 0 Edition revisien numbers are used in the numbering of amendment items in order to point to the particular edition revision of the C amp SS or PL to which that item should be applied For example amendment item Item No PLO3 3 d7 co 2 should be applied to the Presentation Library edition revisien 3 2 1 2 4 1 5 Amendment item identifiers Each item within an amendment is assigned a unique identifier with the
4. ECDIS Display Generator that is designed by each manufacturer on his own following the guidelines of this documentation and which performs the link between the object characteristic according to S 57 and the actual presentation on the ECDIS screen Note that the basic concept for a Display Generator that is described in this section is only an example There are other concepts to realize the ECDIS presentation NOTE ALSO THAT THE DISPLAY GENERATOR IS NOT PROVIDED IN THE PRESENTATION LIBRARY THE MANUFACTURER MUST DEVELOP THIS Figure 1 shows how the various elements of the Presentation Library can be linked together in order to display an S 57 object from the SENC Only the individual elements symbol library look up tables etc are provided in the Presentation Library It is understood that the ECDIS manufacturer writes software linking these elements Please note that section 8 of this manual gives further details that are of interest to the programmer Note particularly section 8 4 dealing with the display of objects depending on date e g DATSTA DATEND or on display scale SCAMIN The requirement to display date dependent information outside the date at which it is active for route planning etc means that the date filter in the first diamond of figure 1 will be deliberately by passed on request by the mariner When this option is in use the mariner must be reminded that the information on the display may not be correct for the actual curre
5. The ECDIS display meritor calibration should be verified for type approval of CRT monitors as described in section 5 2 3 using a combination of instrumental testing for the bright sun colour table and subjective visual checking for the dusk and night colour tables Only limited experience has been gained with calibration schemes for LCDs Based on this the procedure of calibrating all three colour tables by the current method used for CRTs together with remote control of the calibration settings should be used for LCDs for the interim 2003 C amp S MD4 March 2004 23 Change 2 5 2 3 1 Tolerances The tolerances quoted below apply only to the process of converting CIE colour coordinates to RGB values and so should be evaluated shortly after the ECDIS leaves the manufacturer s plant Considerable operational experience will be needed before it will be possible to state colour maintenance for type approval purposes they are restricted to the bright sun table Colour tolerance values 1 The discrimination difference between any two colours displayed except those with a tabular AE less than 20 see list in Annex B 4 5 should be not less than 10 AE units 2 The difference between the colour displayed and the CIE colour defined in these specifications should be not greater than 8 16 AC units If a monitor is independently tested then the difference shall be not greater than 8 AC units 3 The luminance o
6. as non dangerous soundings and fish farms whereas magenta is used to highlight critically important features such as isolated dangers It is obviously more appropriate that the floating hazard symbol should be magenta rather than grey and symbol FLTHAZO01 has been replaced by symbol FLTHAZ02 coloured magenta CHMGD in the symbol library and the look up tables 6 TEXT GROUPINGS Add to PresLib Manual section 13 3 Text Groupings the attribute VERCSA as follows 11 vertical clearance of bridges overhead cable pipe or conveyor BRIDGE CBLOHD PIPOHD CONVYR VERCSA VERCLR VERCCL VERCOP bearing of navline recommended route deep water route centreline line NAVLNE RCRTCL DWRTCL ORIENT 7 VIEWING GROUPS Add to PresLib Manual section 13 2 the following viewing groups 14050 isolated above water dangers in own ship safe water rocks wrecks obstructions which are always dry from conditional symbology procedure UDWHAZ 24020 isolated underwater dangers in waters between the safety contour and the drying line rocks wrecks obstructions mooring cables from conditional symbology procedure UDWHAZ 24050 isolated above water dangers in waters between the safety contour and the drying line rocks wrecks obstructions which are always dry from conditional symbology procedure UDWHAZ 8 SYMBOLIZING OBSTRN CATOBS6 FOUL AREA The case of an area OBSTRN CATOBS6 was transferred from CSP OBSTRNO04 to the area lo
7. be posted on the Maintenance Bulletin Board on the IHO website www iho shom fr C amp S MD4 March 2004 FretHB wil net e issuethe Colour amp Symbol Specifications_or the Presentation_Library_Users Manuatas a Ekg eA Deg eo i a mo ue E ea ia RR NSN i E ga 1 2 4 2 2 Clarifications and deferred corrections Deferred amendments will be posted on the IHO Maintenance Bulletin Board All existent deferred amendments will be implemented in the next edition of the specificatiens S52 App 2 which is identified as bringing them into force However an ECDIS manufacturer may implement a deferred amendment earlier if he wishes to do so except when it is specifically stated that a particular amendment should not be implemented before the next edition bringing deferred amendments into force is issued in order to preserve uniformity in symbolising the ENC When an amendment is implemented in a type approved ECDIS the manufacturer should inform the type approval authority in case re testing may be required 1 2 4 2 3 Extensions are working documents available from the IHB for test purposes on request A description of the extension will be put on the web site 1 2 4 2 4 Before and _ after plots Where appropriate before and after plots will whenever possible accompany amendments that make a change in symbolization 1 2 4 2 5 Change control history amp list of current editions Amendments will include a change control histor
8. of the PresLib has been discussed on the C amp SWG section of the Open ECDIS Forum The moderator asked members who had contact with mariners using ECDIS to say whether the digital version of Chart 1 is being used on the bridge and whether it would be adequate to issue only a hard copy version for this revision The following is an abstract from the moderator s summary of the discussion There is no support for maintaining the quasi S 57 chart 1 database in its present form A hard copy chart 1 with symbol meanings alongside each symbol is the most convenient form for the mariner and this should be readily available in electronic form such as jpg We should consider a version which shows only those ECDIS symbols that differ from the paper chart symbol set The S 57 format digital version of the ECDIS Chart 1 will be supplied with edition 3 3 of the PresLib but future updating depends on a voluntary maintainer and this feature may be omitted from future editions emitted from The future form of the ECDIS chart 1 is currently under discussion Meanwhile Chart 1 in word processed form continues to be carried in section 15 2 of the PresLib Item No CS04 1 d6 co 25 Corrections and clarifications to C amp S Specifications and Presentation Library Minor changes to the Presentation Library etc 1 LOOK UP TABLE RULE A further example has been added in a case below where the rule is not entirely clear 8 3 3 3 Details of the a
9. of the PresLib Mariners Navigational Objects have been updated for changes in Navigational Symbols in IEC 61174 ed 2 July 2000 annex E and for the IMO Guidelines for display of AIS Information S N Circular 217 July 2001 The main changes are as follows 1 Extensive revision of AIS symbology following the IMO Guidelines including new symbols for selected target and dangerous target new symbol for lost target old AIS default symbol deleted vector changed to a dashed line path predictor may be provided heading line drawn from the bow turn indication added to it CSP VESSELO2 revised to account for these changes 2 New introduction to PresLib Part II Mariners Navigational Objects including a table relating IEC and IMO symbology to S 52 symbol plots 3 Revisions to symbols CSPs attributes tables Chart1 etc to bring the PresLib up to date with IEC 61174 ed 2 and IMO S N Circ 217 Details are contained in edition 3 3 of the PresLib Part Il Changes have also been made to the following Mariners Objects CSPs C amp S MD4 March 2004 24 LEGLINO2 gt LEGLINO3 OWNSHP02_ clarification VESSEL01 gt VESSEL02 VRMEBLO1 gt VRMEBLO2 Item No PLO3 2 d6 co 29 Corrections to Presentation Library Mariner s option to display isolated dangers in unsafe waters shallower than the safety contour Because there are very few ENCs available with dense contouring the safety contour dis
10. should be revised to give the correct references C amp S MD4 March 2004 16 Item No PLO3 2 d6 co 13 Correction to Presentation Library section 11 Symbolisation of an unsurveyed area Australia has pointed out that the existing symbolisation fails to show up small unsurveyed areas in a generally surveyed area An unsurveyed area always has an area fill of horizontal dashes but these may not show well in a small area particularly at night and at night the no data colour fill used colour NODTA is at present the same colour black as deep water In addition an unsurveyed area has a low display priority at present with the result that its area boundary line is sometimes suppressed by the boundary line of adjacent higher priority areas However the display priority of an unsurveyed area should not be too high since it may sometimes be necessary to draw mariners objects priority 8 non HO data such as drilling rigs priority 5 etc on top of the area fill which always has the same priority as the boundary line Meeting C amp S 13 item 7 d7 co 1 approved the proposal C amp S 13 5H amp 13 51 3 to increase the luminance of colour NODTA at night and to increase the display priority to remedy this The night colour for NODTA will be increased in luminance from 0 00 to 1 20 cd sq m which is much brighter than the depth less than safety contour colour of 0 4 cd sq m In addition the display priority of object cla
11. C01 b a suggestion for a new symbol SY OVERSC11 an upper case X expressing the overscale factor was rejected by the meeting c C amp S 13 agreed that the symbol SY UNITFTH UNITMTR should be withdrawn see below All the changes are identified in bold on the separate file CSP DATCVR92 Sept02 dec CSP DATCVRO02 Sept 02 rev doc Follow on changes 1 1 Revise all look up table references to CS DATCVRO2 1 2 Presentation Library Part l section 13 2 Amend viewing group 11060 to read 11060 Non HO data boundary LC NONHODAT 1 3 ECDIS Chart 1 Amend page AB to remove line LC HODAT01 and add line LC NONHODAT This page is to be found in PresLib section 15 2 Information about the chart display A B 2 1 Withdrawal of symbols for units of depth IMO PS appendix 2 requires as part of the Display Base the units of depth and height However S57 has from the start required that only metres be used for ENCs so the prominent M or F required by PresLib Manual 8 5 2 is unnecessary clutter To remove these 2 2 Delete the existing section 8 5 2 of the PresLib Manual and replace it with the following 8 5 2 Units of depths IMO PS Appendix 2 para 1 7 requires that units of depth be part of the display base However S57 does not permit any other unit of depth than metres and so it is no longer necessary to display the earlier symbols UNITFTH1 and UNITMTR1 These symbols are hereby removed from the PresLi
12. INTERNATIONAL HYDROGRAPHIC ORGANIZATION Special Publication No 52 Appendix 2 COLOUR amp SYMBOL SPECIFICATIONS FOR ECDIS Edition 4 1 January 1999 and its Annex A IHO ECDIS PRESENTATION LIBRARY Edition 3 2 May 2000 C amp S MAINTENANCE DOCUMENT Number 4 March 2004 DEFERRED AMENDMENT 6 Published by the International Hydrographic Bureau 4 Quai Antoine 1er B P 445 MC 98011 MONACO Cedex Principaut de Monaco Telefax 377 93 10 81 40 E mail info ihb mc Web site www iho shom fr C amp S MD4 March 2004 Page intentionally left blank C amp S MD4 March 2004 Introduction The procedures for amending S 52 Appendix 2 follow those established for S 57 except in stressing the distinction between immediate and deferred amendments Definitions and procedures for these amendments are given in S 52 App 2 Colour amp Symbol Specifications for ECDIS C amp S Specs section 1 2 4 1 Amendments to S 52 App 2 affect primarily the ECDIS manufacturers though the mariners will benefit from the improvements made The consequences of revisions of detail in an immediate amendment are generally a relatively minor matter for example replacing a table in the manufacturer s software However once type approved ECDIS are installed onboard ship applying amendments becomes a much more difficult matter An immediate amendment to the C amp S Specs or Presentation Library PresLib changes the edition number It appl
13. Lib ed 3 3 Item No CS04 1 d6 co 27_ Correction to C amp S Specifications sections 4 and 5 and Annex B Alignment of colour calibration procedures with IEC 61174 Ed 2 and with current experience with LCD displays The minutes of C amp S13 item 9 5 4 discusses current experience with colour calibration of LCD displays and 9 5 5 requires alignment of the colour calibration requirements and procedures in the C amp S Specs to be consistent with IEC 61174 The minutes of C amp S14 item 5 8 confirms the conclusions from C amp S13 Colour amp Symbol Specs sections 4 and 5 and Annex B have been revised for use with other displays than CRTs with the following three substantive changes Change 1 4 1 3 REmeniter Display_calibration and verification The ECDIS GRFmeniter display should be calibrated initially in order to transform the CIE colour table coordinates to screen coordinates DAC digital to analog converter voltage values for the RGB guns The main components of ECDIS display are monitor and image generator Both the monitor and the image generator used to drive the ECDIS display can be calibrated together as a colour generating unit Another alternative is to calibrate separately both the monitor and image generator This process is described for CRT screens in Annex B1 and software for processing calibration and converting CIE colour coordinates to RGB with worked examples is included in the Presentation Library
14. The text of the C amp S Specifications and the Presentation Library has been revised to reflect changes in the organisation of S52 App 2 since editions 4 0 and 3 0 were published in 1997 The technical changes in this revision are described in other items of amendment d6 The main organisational change reflects the general consensus within the C amp SMWG at meetings 13 and 14 that with the completion of the word processed version of the Symbol Library the word processed Presentation Library becomes the official version and that there will be a charge for this to help to pay for maintenance The digital version in dai format will be available as a manufacturer s option for ed 3 3 but may not be available in future Details of the changes follow 1 COLOUR amp SYMBOL SPECIFICATIONS Only minor changes have been made to the C amp S Specs and Annexes B Initial Colour Calibration and C Maintaining Colour Calibration However the Chart 1 and symbol diagrams of the old Hard copy Addendum to the Presentation Library have been moved to a new section 15 of the PresLib In addition the Colour calibration sections of the C amp S Specs and Annexes B and C have been brought into line with IEC 61174 requirements and experience with LCD displays 2 PRESENTATION LIBRARY The Presentation Library as a word processed file has become the official version for the future and there will be a charge for this to help to pay for maintenance The digital versio
15. are revised Note that the C amp S Specs have not been updated to edition 4 1 The above outcomes are therefore to be applied to existing immediate amendment 01 Item No CS04 0 i01 co 001 which introduced the amendment procedures C amp S 13 minutes item 6 accepted the amendment below At C amp S14 it was accepted informally that the Presentation library as a word processed file would become the Official Presentation Library and that it would carry a subscription charge for each new edition to help to cover maintenance costs The digital version in dai format containing the Symbol Library Colour Tables and Look up Tables would be provided as a manufacturer s option for edition 3 3 but may not be updated or provided for succeeding editions It was also agreed that amendments would in future be posted on the IHB Maintenance Bulletin Board minutes item 12 2 To implement these instructions from C amp S12 and 13 revise C amp S Specs ed 4 1 section 1 2 2 to read as follows changes in stikethrough and bold The Presentation Library together with the Colour amp Symbol Specifications are is supplied as a word processed file on a CD which carries a subscription charge for each new edition to help to cover maintenance costs This is the Official Version of the Presentation Library A digital version in dai format containing the Symbol Library Colour Tables and Look up Tables is provided as a manufacturer s option for edition 3
16. area ODStrMS ose eeeceeceneeeeeneeeeeeeeeeeneeeeeeeeeeeaeeeeeneeteeneeeeneeeeeeaeeee p 17 Item No PLO3 2 d6 cl 17 Clarification to Presentation Library section 11 UOC change geographic names NO action at present ieeecccesseeeseeeesneeeeeneeeeseeeeeeneeeeeeeeseeeeeesatesenaeeeenaeees p 18 Item No PLO3 2 d6 cl 18 Clarification to Presentation Library 8 6 2 2 UOC Change Collection Objects ceecceeeeceeeseeeeeeeeeteseeeeeeneeeeeaeeeseaneeseseeeeseneeseneneesneeente mennet p 18 Item No PLO3 2 d6 cl 19 Clarification to Presentation Library section 11 UOC discussion symbolizing a floating breakwater no action at presen eeeeseceesceeeneeeeeneeeteneeeeeneeeesaees p 18 C amp S MD4 March 2004 Item No CS04 1 d6 cl 20 Clarification to Colour amp Symbol Specs annex B4 6 1 Ishihara Colour blindness test 2 c ccc ssccccsssceseseeshecnechateactasanecdesenschavechensecnndgeiaeeseefesageape Item No CS04 1 d6 cl 21 Clarification to Colour amp Symbol Specifications 3 4 3 overbrighttoolbar S eea itch Ge aoe ne aetna retention a ie Se Item No PL0O3 2 d6 cl 22 Clarification to Presentation Library section 5 new example for amendment d02 co 029 complex linestyles for curved lines essc Item No PL03 2 d6 co 23 Correction to Presentation Library displaying OBJNAM INFORM and TXTDSC on collection objects ee ecceeececeeeeeeeeeeeeneeeneeeeeeeeneeeeaeeeeensaee Ite
17. b C amp S MD4 March 2004 13 2 3 Delete units of depth from Colour amp Symbol Specs section 3 2 2 1 as follows Ifthe safety contour selected by the mariner is not available in the SENC the ECDIS should default to next deeper contour and inform the mariner If when the ship moves onto a new chart the safety contour previously in use is no longer available or the_units of depth change the ECDIS should again select the next deeper contour and inform the mariner 2 4 Delete the text of existing section 3 2 3 8c of the colour amp Symbol Specs and replace with the following 8c Change of units of depth This section is deleted because S57 does not permit any other units of depth than metres in the ENC 2 5 Delete linestyles number 519 LC UNITFTH1 and 520 LC UNITMTRY1 from the symbol library the list of symbols the symbol diagrams and page A B of Chart 1 Item No PL03 2 d6 co 10 Correction to to PresLib section 12 CSPs drawing from edges rather than from line depth areas C amp S12 Minutes item 5 4 3 implied that drawing the Safety Contour from the edges of depth areas should be evaluated in order to assess the impact on S52 of dropping linear depth areas from S57 C amp S 13 minutes item 7 d7 c0 3 and item 8 note that this method was accepted subject to testing by volunteering manufacturers Revised CSP DEPARE O2 of Jan 03 draws the safety contour from the edges of DEPARE and DRGARE o
18. bjects and highlights it as the safety contour If and only if the safety contour is suppported by a DEPCNT object DEPARE02 also labels it as a mariner s option Edition 3 3 of the PresLib no longer recognises line depth areas Revised CSP DEPCNTO3 of Sept 02 merely draws and optionally labels all DEPCNT objects The higher display priority of the safety contour drawn by CSP DEPARE02 will ensure that the safety contour overwrites the repeat of an ordinary contour drawn by CSP DEPCNT03 These CSPs have worked satisfactorily in tests in the office Changes required Item d6 co 11 below describes the revisions needed to implement these changes in general In particular because edition 3 3 of the PresLib no longer recognises line depth areas add to PresLib section 11 2 line look up table the following no symbol entry DEPARE S y Item No PLO3 2 d6 co 11 Correction to Symbol Library and to PresLib Look up Tables and CSPs labelling the Safety Contour and other contours C amp S12 Minutes item 5 4 2 required evaluation of labelling contours which is particularly important in the case of the Safety Contour since this will almost always be a default value from the ideal contour requested by the mariner and he needs to know what contour value he is actually seeing as safety contour Labelling is to be at mariner s request C amp S 13 minutes item 7 d7 co 2 and item 8 state that labelling of contours should be a
19. bove If there is more than one line in the look up table search for the first line each of whose attribute values in field 2 can also be found in the attribute values of the object If more than one attribute value is given in the look up table the match to the object must be exact in order as well as content For example a look up table attribute value 4 3 4 is not matched by object attribute values 3 4 3 or 4 3 However the existence of further attribute values does not invalidate the match in the above example object attribute values 4 3 4 7 would match the look up table because value 7 is not used in symbolizing Use the symbology instruction given by that line in field 3 to symbolize the object s geometry As a further example an object BCNLAT COLOUR3 1 for which there is no exact match in the simplified point look up table should be symbolized using the line for BCNLAT COLOUR3 If no look up table line can be identified where all attribute values in field 2 match the object s attributes select the symbology instruction from the first line that contains the object class code in field 1 Field 2 of this line shall be empty and field 3 shall contain a fail safe generic symbolization instruction 2 RESERVE BLUE Minutes of C amp S 13 item 9 6 6 refer to the use of blue for AIS To be consistent with C amp S Specs Table 1 amend PresLib section 4 1 colour section iv to RESBL blue provisionally reserved for VTS line feat
20. d6 co 1 Correction to Colour amp Symbol Specifications 1 2 3 and 1 2 4 revised Amendment Procedures oon eeeeeceeeeseeeeeneeeeneeeeenneeeeeaeeeseneeeseeeessneeeeenaeees p 4 Item No PLO3 2 d6 co 2 Correction to PresLib section 9 ECDIS onboard ship no longer required to accept amendments automatically remove test edition of PresLib p 7 Item No CS04 1 d6 cl 3 Clarification to Colour amp Symbol Specifications new section 1 2 6 Minor Deviations to the Presentation Library eeens p 8 Item No PLO3 2 d6 cl 4 Clarification to Presentation Library 8 6 1 displaying PICREP amp TXTDSC attribute information oo cece cee eeeeeeeeeeeeeeeeeseeeeeseeeeeeseaeeseeeseeeeenees p 8 Item No PLO3 2 d6 co 5 Correction to Presentation Library 8 4 displaying date deperndent Objects oo eecceeeeeceseeeeeeneeeeeeeeeeeeeeeeeaeeeesaneeseaaeessaeeessaaeesesaneesaeeseeaeeesseneeeeneeerses p 9 Item No PL0O3 2 d6 co 6 Correction to Presentation Library 7 4 5 2 cell boundary li s t DE MASKS an ciseccccaleliiedigeeadigechasecessacdeadanteadadecddianceiscecaeectapeagecaaieceaden seusiac feieapeaieeeteancntes p 11 Item No PL03 2 d6 cl 7 Clarification to Presentation Library 8 3 3 7 symbolizing an object of unknown unidentified object ClaSS ooo ences eeeee rennet eeneeeeenneeeeeaeeereneees p 11 Item No PLO3 2 d6 cl 8 Clarification to Presentation Library 8 3 3 7 identifying automatic Chart corrections
21. dopted and should be incorporated in PresLib 3 3 after successful testing with the following specifications drawing the labels is to be based on the new CSP SAFCON01 label only when the contour is supported by a DEPCNT object the thin background outline is to be used the mariner should be given the option to select contour labels or not the labels should be upright on the screen like all other symbols and not in line with the contour the safety contour label to be in viewing group 33021 and the label for other contours in group 33022 CSP DEPARE02 Sept 02 has been modified to label the Safety Contour which it derives from the edges of the depth areas if and only if these edges are supported by a DEPCNT object CSP DEPCNT03 Sept 02 has been modified to label all contours which are supported by a DEPCNT object The Safety Contour will overwrite any other contour because of of its higher display priority Both CSPs refer to new CSP SAFCON for labelling C amp S MD4 March 2004 14 The labelling style is the same for both the safety contour and for all other contours See also amendment d6 co 12 below To implement this change add CSPs DEPARE02 DEPCNT03 and SAFCONO1 all the 6 Jan 03 version to the PresLib section 12 change the relevant references in the look up tables add the contour labels to the symbol library add the viewing groups to section 13 2 Item PLO3 2 d6 co 12 Correction to PresLib secti
22. e way as LNDARE objects Follow on change Change CS DEPARE01 wherever it appears to CS DEPARE02 Item No PLO3 2 d6 co 16 Correction to Presentation Library section 12 UOC change LNDARE underlay for area obstrns Clause 6 2 2 of the UOC has been in changed to include LNDARE in addition to the original DEPARE or UNSARE as an underlay for area obstructions In order to determine whether an obstruction is an underwater hazard a revised CSP UDWHAZ04 has been written which examines LNDAREs and UNSAREs as well as DEPAREs and DRGAREs to determine whether the obstruction is an isolated danger lying in safe water See separate file CSP UDWHAZ04 Follow on change Change CS UDWHAZ03 to CS UDWHAZ04 wherever it appears C amp S MD4 March 2004 18 Item No PLO3 2 d6 cl 17 Clarification to Presentation Library section 11 UOC change geographic names no action at present The draft for clause 14 Geographic names of ed 2 1 of the UOC has changes to code LNDRGN objects to name co located navaids and also to code SEAARE objects to code names associated with SBDARE objects rocks reefs shoals etc These will probably cause overwriting with pre existing names This problem should be investigated at a later date when the TSMAD decides the details and we have more time to study them Item No PL0O3 2 d6 cl 18 Clarification to Presentation Library 8 6 2 2 UOC change collection objects Add to section 8 6 2 2 of t
23. ee separate file Amndt curved linestyles with example doc Item No PresLib03 2 d6 co 23 Correction to Presentation Library displaying OBJNAM INFORM and TXTDSC on collection objecis C amp S12 Minutes item 5 4 4 noted that applying INFORM and TXTDSC attributes on collection objects is likely to cause excessive clutter The same problem applies to OBJUNAM Outcome 2 reads 2 The meeting also agreed that manufacturers should be left to develop appropriate solutions for displaying information associated with collection objects that minimises clutter The Minutes required a deferred amendment to the PresLib manual on this subject To provide this amend PresLib Manual section 8 6 2 as follows 8 6 2 Relationships and collection objects Thei ianifi siny f f The manufacturer should endeavour to develop appropriate solutions for displaying information associated with collection objects that minimise clutter ebject buey beacon tightheuse Inthe case of a light for example it will be written by a text command calling group 21 for buoys and beacons and 26 ferlighthouses C amp S MD4 March 2004 20 Item No CS04 1 d6 co 24 Correction to C amp S Specifications and Presentation Library The digital version of ECDIS chart 1 may be omitied from future editons after PresLib 3 3 The question of whether it is necessary to update the ECDIS Chart 1 for editions 4 2 of the C amp S Specs and 3 3
24. emporary cartographic objects that the ECDIS will handle internally the way it handles the scale bar for example These new objects would be used to show things like accuracy symbols and to label contours The conditional procedures could then be modified to specify when to create these objects and what viewing groups and priorities they should have Of course this introduces another problem that these cartographic objects would need to be turned on off either when the mariner says so or if the mariner turns the underlying object on off So if contours are turned off so should the labels be This could be handled if the ECDIS discards the cartographic objects at the end of each draw and they get generated by the conditional procedure during each draw based on the current mariner parameter settings C amp S MD4 March 2004 15 Remember also that the PresLib as a whole can be implemented in any way the manufacturer wishes and that the viewing groups are specified as being an optional part of the PresLib The requirement of IMO Performance Standard section 3 5 that It should be easy to add or remove information from the ECDIS display is the requirement which has to be satisfied INTRODUCING THE NEW VIEWING GROUPS AND REVISING THE CSPs USED TO GIVE THE REQUIRED VIEWING CONTROL 1 Amend PresLib section 8 3 4 4 to read 8 3 4 4 Viewing Groups The mariner should have effective control over which features appear on the display subject to t
25. esLib and where appropriate a note has been added in the PresLib to say that the Test Edition is no longer required but that symbol CHKSYM01 has been retained for use in checking symbol size C amp S MD4 March 2004 Item No CS04 1 d6 cl 3 Clarification to Colour amp Symbol Specifications new section 1 2 6 Minor Deviations to the Presentation Library The C amp S12 meeting agreed that the list of slight deviations as agreed at C amp S9 revised at C amp S11 be included in Section 1 of S 52 Appendix 2 This re arrangement will be treated as a deferred amendment which supersedes deferred amendment CS04 1 d05 cl 004 The C amp S 13 meeting moved this item to section 1 2 6 Add the following new section 1 2 6 to the C amp S Specifications 1 2 6 Type Approval Minor Deviations to the Presentation Library It is acknowledged that the manufacturers of navigational equipment and software are in constant contact with ECDIS users To allow for fast response to suggestions for improvement to the chart display the IHO Presentation Library for ECDIS is designed to provide a framework and guideline for chart symbolization from which the ECDIS manufacturer can derive a customized Presentation Library The following criteria shall serve as a guide for judging whether any symbolization on an ECDIS which is visibly different from the symbolization provided by the IHO Presentation Library and as demonstrated by the IHO Test Data Set print o
26. f the colour displayed should be within 20 of its specified value except for black Black is a special case and the luminance of it shall be not greater than 0 52 cd m for bright sun colour table 5 2 3 2 Instrumental calibration verification test For CRT displays an instrumental test to check that the results of the colour conversion calibration described in Annex B1 are within tolerance should be made by displaying the colours of the brightsun Day colour table restricted to colour pairs of tabular AE greater than 20 measuring their CIE coordinates x y and L and applying a tolerance test The procedure is described in Annex B4 For LCD displays the instrumental test should be applied to all three colour tables Change 3 B 1 3 3 Setting the Controls para 3 The process for correctly setting the controls is as follows with the GRF monitor in a dark room and with the GRF monitor turned on and warmed up to the manufacturer s specification drive the monitor with a black signal 0 0 0 Observe the border areajustshews Measure the Luminance of this area It should be less than 002 0 52 candelas per square metre cd m2 Lock this the appropriate controls for the calibration process Item No PLO3 2 d6 co 28 Correction to Symbol Library and Presentation Library Updating the Mariner s Navigational Symbols to IEC 6117 ed 2 annex E and to IMO S N Circ 217 on AIS symbols The Symbol Library Chart 1 CSPs and Part Il
27. following form ssmm n aa dd nnn where ss Colour amp Symbol Specifications CS or Presentation Library PL depending on which the amendment applies to mm n the edition evisien number to which the amendment applies aaa aa deferred d or immediate i anendment followed by the sequential number of the amendment 2 digits dd Clarification cl correction co or extension ex AAn sequential number of the item within the amendment For example look at item no PL03 3 d7 co 2 reading from the last number group back to the first 2 this is item 2 of the amendment co this item is a correction d7 it is a part of deferred amendment 7 PLO3 3 it applies to PresLib edition 3 3 Note that i the edition number of the PresLib would not advance after applying this deferred amendment ii If this example had been an immediate amendment the item number would have been PLO3 3 i7 co 2 In the case of an immediate amendment the edition number of the PresLib would have automatically advanced to 03 3 once the amendment was applied iii The next amendment would have been numbered amendment 8 whether it was an immediate amendment or a deferred amendment 1 2 4 2 Distribution andimplementation 1 2 4 2 1 Immediate corrections to both the Colour amp Symbol Specifications and the Presentation Library will be distributed with an initial delivery of the specifications S52 App2 or when necessary They will
28. formal notes to the technical staff in care of the IHB member Chairman IHO C amp SMWG International Hydrographic Bureau MC98011 Monaco Fax 377 9310 8140 or E mail info ihb mc Item No PLO3 2 d6 cl 4 Clarification to Presentation Library 8 6 1 displaying PICREP amp TXTDSC attribute information C amp S12 minutes item 5 4 10a outcomes 2 and 3 read 2 The meeting agreed that manufacturers should provide appropriate solutions that enable PICREP files to be displayed without affecting night vision This will be incorporated as a deferred amendment in Appendix 2 to S 52 3 The meeting agreed to monitor the solutions that are being developed by manufacturers but not to impose particular technical standards at this stage C amp S MD4 March 2004 C amp S12 minutes item 5 4 10b outcome 1 reads 1 The meeting agreed that the introduction of additional symbology would not be beneficial and yn the current i symbol was well known as representing information in general C amp S 13 minutes item 6 accepted the following amendment d6 cl 4 To implement these outcomes from C amp S12 revise PresLib ed 3 2 section 8 6 1 to read as follows 8 6 1 INFORM etc plus national language versions 8 6 1 1 Details of the above HOs may apply the INFORM attribute to any object to carry information that cannot be coded in S 57 format such as a warning for a traffic junction an abstract from a nautical publicat
29. ftware the Digital Chart 1 and the Colour Test Diagram has been re located in Part as new section 19 The new layout of the PresLib is PARTI USERS MANUAL sections 1 8 description of symbolisation methods sections 9 amp 10 description of the digital Presentation Library TABLES AND SYMBOLISATION PROCEDURES section 11 Look up Tables section 12 Conditional Symbology Procedures section 13 Colour Tables Viewing Groups and Text Groups SYMBOL LIBRARY AND SYMBOL PLOTS section 14 Symbol Library description detailed specifications in Addendum section 15 ECDIS Chart 1 Symbol plots symbol meanings colour test diagram REFERENCES AND NOTES sections 16 17 References Bibliography Glossary section 18 contents of the accompanying digital files section 19 use of colour calibration software digital Chart 1 colour test diagram PARTII MARINERS NAVIGATIONAL OBJECTS sections 1 2 Introduction explanations section 3 Mariners Object Classes section 4 Navigational Attributes section 5 References ADDENDUM Symbol Specifications in detail DIGITAL FILES ON CD ROM DAI file version of the Presentation Library if available pseudo S57 file version of ECDIS Chart 1 if available colour test diagram pseudo S 57 code with look up table C program for conditional symbology procedure LITDSN CRT calibration software AMENDMENTS Future amendments after amendment d6 will be published on the IHO Maintenance Bulleti
30. fy the UOC 5 4 3 definition of DRVAL1 by stating that isolated wrecks rocks and obstructions within a particular DEPARE may have less depth than the DRVAL1 of that DEPARE 2 To encourage the coding of EXPSOU 1 within the range of depth of the surrounding depth area on wrecks rocks and obstructions wherever sufficient information is available to do so and To encourage the coding of EXPSOU 2 not within the range of depth of the surrounding depth area wherever the information available is insufficient In order to provide the best possible information available on the least depth over such hazards and thus eliminate clutter from unnecessary ISODGR symbols on the ECDIS display To implement this change 1 Replace the following conditional procedures with their revisions CSP DEPVALO1 gt DEPVAL02 CSP OBSTRNO04 gt OBSTRNO5 CSP WRECKS02 gt WRECKS03 2 Replace the title pages of CSP DEPVAL and CSP WRECKS with the revisions in the attachment Item No PLO3 2 d6 co 15 Correction to Presentation Library section 12 UOC change UNSARE underlay for non navigable rivers etc Section 4 1 of the UOC has been changed to add UNSARE to LNDARE as an alternative group 1 underlay for rivers canals lakes basins and docks which are not navigable at compilation scale In order to correctly symbolize the case when the safety contour bounds one of these objects the revised CSP DEPAREO2 has been modified to treat UNSARE objects in the sam
31. he PresLib Manual The following paragraphs from clause 15 COLLECTION OBJECTS of the next edition of S57 Appendix B 1 Annex A Use of the Object Catalogue UOC They are quoted here for information If a collection object extends beyond a cell boundary i e the objects that make up the collection are spread over multiple cells the collection object should be repeated in each cell that contains one or more component objects However only the objects that exist in the cell that contains the instance of the collection object can be referenced by that collection object If this technique is used each instance of the original collection object must have the same feature object identifier NAM It is up to the application e g the ECDIS that uses the cells to rebuild the complete collection object based on the unique feature object identifier It is highly recommended that no use be made of pointers that reference objects outside the cell in which the pointer is encoded Use of such pointers can not be prohibited as no such rule exists in the ENC Product Specification Item No PLO3 2 d6 cl 19 Clarification to Presentation Library section 11 UOC discussion symbolizing a floating breakwater no action at present There is discussion in the amendments to UOC ed 2 0 on the UOC clause 4 6 8 about how to symbolise a floating breakwater The look up tables already cover the likely codings and so no action is required at present Ite
32. he history of the previous changes is as follows MD stands for IHO Maintenance Document IA stands for Immediate Amendment and DA stands for Deferred Amendment Colours amp Symbols Specifications S 52 Appendix 2 e Edition 4 0 July 1997 MD1 IA i01 gt Edition 4 1 January 1999 e Edition 4 1 MD2 DA d02 MD4 DA d6 gt Edition 4 2 2004 Presentation Library Annex A to S 52 Appendix 2 e Edition 3 0 July 1997 MD1 IA i01 gt Edition 3 1 January 1999 e Edition 3 1 MD 3 IA i04 gt Edition 3 2 May 2000 e Edition 3 2 MD2 DA d02 MD3 DA d05 MD4 DA d6 gt Edition 3 3 2004 e Digital versions PRSLIBO3 dai July 1997 PSLB03_1 dai December 1998 PSLBO3_2 dai May 2000 e Temporary digital files PSTY03_0 dai June 1999 PSTY3_2b dai October 2001 see amendment d05 cl 005 3 ERROR IN TEMPORARY DAI FILES FOR PRESLIB 3 2 An error exists in the deep water route centreline linestyle LC DWRTCLO7 amp 08 in all the past temporary PSTY DAI digital Presentation Library files applying to PresLib ed 3 2 i e PSTY03_0 DAI of 28 June 1999 PSTY3_2b DAI of 5 Oct 2001 and PSTY3_2B DAI of 9 Apr 2002 this file was issued at meeting C amp S 13 but was never distributed generally The errror is that the arrow points in the wrong direction by 180 deg This error does not exist in the regular digital file PSLBO3_2 DAI C amp S MD4 March 2004 INDEX OF ITEMS IN DEFERRED AMENDMENT 6 Item No CS04 1
33. he over riding requirements of IMO category as required by the IMO ECDIS Performance Standard section 3 5 The viewing groups suggested in table 13 2 are intended as a framework on which the ECDIS manufacturer can base his own method of providing this capability Viewing groups are on or off switches for use by the mariner to control the information appearing on the display An item in the viewing group table may be a chart object a mariners or other time variable object a special symbol such as the depth less than safety contour pattern or a non ENC feature such as the scale bar In edition 3 3 further symbol viewing groups have been added to allow auxiliary symbols such as contour labels the low accuracy symbol etc to be switched on or off without affecting the primary symbolisation of the object Items in the viewing group tables in section 13 2 are arranged in numbered groups e g group 26230 consisting of the items pipeline area and cable area which in turn are arranged in sets e g set 26000 consisting of cautionary areas The groups are arranged by IMO Category in the sequence of INT 1 for the paper chart because mariners are generally familiar with INT 1 The suggested viewing group is listed in field 7 of the look up tables and may be modifed by the conditional symbology procedures Symbol viewing groups are only switched by a conditional procedure The viewing greup suggested fer each_object is_given i
34. ier subscribers free for attendees of C amp SMWG 12 2 When to set edition 3 3 in force for type approval o New development one year grace period starting from the date of issue o New selling already type approved before date of issue one year grace period starting from the date of issue The grace periods should be added by the IHB to the title page or preamble of the new editions of the C amp S Specs and the PresLib 3 C amp S14 Minutes item 5 2 confirm that C amp SS ed 4 2 and PresLib ed 3 3 will be published forthwith End of deferred amendment d6 March 2004 Note that the edition numbers have changed after this deferred amendment which brought all of deferred amendments d2 d5 and d6 into effect They have become Colour amp Symbol Specifications 4 2 and Presentation Library 3 3 Minutes of meeting C amp S 12 item 5 1 1 and C amp S 13 items 12 1 and 12 2 Please refer to the IHO website www iho shom fr for further information on current editions of IHO ECDIS publications C amp S MD4 March 2004
35. ies only to corrections which must not depend on any deferred amendment A deferred amendment is not entered in any S 52 Appendix 2 document until the next edition which is identified as bringing the deferred amendments into force The item number of each amendment item gives the edition number of the C amp S Specs or the PresLib to which the amendment item applies This edition number will change once an immediate amendment is applied but does not change for a deferred amendment At the end of each immediate amendment there is a reminder of the current edition number after the amendment is applied C amp S MD4 March 2004 ii Page intentionally left blank C amp S MD4 March 2004 S 52 APP 2 DEFERRED AMENDMENT 6 March 2004 NOTES 1 These amendments are intended to remind users of S52 App 2 of the changes made at meetings C amp S 13 and 14 and to point out where these changes have been applied in producing C amp S Specs ed 4 2 and PresLib 3 3 2 CHANGE HISTORY FOR S 52 APP 2 FROM C amp S SPECS 4 0 gt 4 2 AND PRESLIB 3 0 gt 3 3 As decided at C amp SMWG meeting 13 edition 4 2 of the C amp S Specs and 3 3 of the PresLib to be issued in 2004 will bring into effect all outstanding deferred amendments to editions 4 0 of the C amp S Specs and 3 0 of the PresLib issued in 1997 CHANGE HISTORY FROM 1997 TO 2004 As required by C amp S12 minutes 5 3 4 a change history should be added to the C amp S Specs and the PresLib T
36. ion a pictorial representation of an object etc There are a total of five similar universal attributes INFORM national language NINFOM TXTDSC national language NTXTDS PICREP To identify objects with such additional information the ECDIS should on mariner s command identify all objects having any such attribute populated by means of SY INFORMOI The mariner should then be able to access the information by cursor pick Note that this applies to all SENC objects whether symbolized by look up table or conditional symbology procedure The pivot point of SY INFORMO01 should be placed at the position of a point object at the midpoint of a line object or at the centre of an area object SY INFORM01 is intended as a temporary overlay It s display priority is 8 overradar category other viewing group 31030 The ECDIS manufacturer should provide appropriate solutions that enable PICREP and other files to be displayed without affecting night vision Note this applies as of September 2001 particular technical standards may be applied at a later date if found necessary No further change is required Note that the outcome of C amp S12 item 5 4 10b was that no additional symbolgy is needed to distinguish TXTDSC from other additional information Item No PLO3 2 d6 co 5 Correction to Presentation Library 8 4 displaying date dependent objects C amp S12 minutes item 5 4 11 outcomes 2 reads 2 The meeting agreed that the
37. isolated hazards wrecks rocks amp obstructions within the DEPARE these may be significantly shallower than the DRVAL1 This is confirmed by the definitions and remarks under attribute EXPSOU in the object catalogue We have to assume the fail safe case that a point or area wreck or obstruction whose VALSOU and EXPSOU are unknown will be shoaler than the DRVAL1 of the surrounding depth area Consequently Le Bihan in discussion with our contractor CARIS has modified his original proposal of using the DRVAL1 of the surrounding DEPARE directly to using the approach recommended in M4 appendix to section 422 7 to estimate a Safe Clearance Depth over wrecks in deep water whose VALSOU is unknown This method which has proved reliable in use by SHOM leads to the following rule Safe Clearance Depth drval1 66 when drval1 66 gt 20 Safe Clearance Depth 20 when drvali 66 lt or 20 The first part of the rule does not cut in until the DRVAL1is greater than 86m but it does eliminate the ISODGR symbols in the deep water traffic lanes off the coast of Brittany CSPs DEPVAL WRECKS and OBSTRN have been modified to use the local DRVAL1 for default least depth where EXPSOU indicates no shoaler depths exist and CSP WRECKS has been modified to use use the Safe Clearance Depth approximation to eliminate isolated danger symbols in very deep water C amp S MD4 March 2004 17 Side issue TSMAD should be asked 1 To clari
38. ive change is one which would result in a change in symbolization 1 2 4 1 ii Correction a relatively specific change to the specifications S52 App 2 to correct errors of commission or omission or to improve the ECDIS presentation in the light of practical experience or to take into account changes in another specification etc 1 2 4 1 iii Extension a more general change to the specifications S52 App 2 intended to improve the ECDIS presentation and approved by the Colours amp Symbols Maintenance Working Group for inclusion in the next edition of the specifications S52 App 2 which is identified as bringing outstanding deferred amendments into force e g a systematic change in display priorities Amendments An amendment may consist of more than one item as follows an immediate amendment will contain only immediate corrections items adeferred amendment may contain either a clarifications and deferred corrections items or b extension items which are distributed separately Deferred and immediate_ Immediate and deferred amendments In exceptional cases applying only to corrections and only where a correction affects safety of navigation an immediate amendment will be made Normally the implementation of all amendments will be deferred until the next editieneHthe specitications edition C amp S MD4 March 2004 which is identified as bringing outstanding deferred amendments into force 1 2 4 1
39. m No CS04 1 d6 co 24 Correction to C amp S Specifications and Presentation Library The digital version of ECDIS chart 1 may be omitted from PresLib 3 3 00 Item No CS04 1 d6 co 25 Corrections and clarifications to C amp S Specifications and Presentation Library Minor changes to the Presentation Library etc eseese Item No CS04 1 d6 co 26 d7 co 6 _ Correction to C amp S Specifications section 4 Colours and Presentation Library section 13 1 Colour Tables 3 table colour system to replace the current 5 table system oo eee een eeeeeeeeeeeeeeaeeeseaeeeeeneeeesaaeeseaeeeeeaeeseeneeeeeeee Item No CS04 1 d6 co 27_ d7 co 7 Correction to C amp S Specifications sections 4 and 5 and Annex B Alignment of colour calibration procedures with IEC 61174 Ed 2 and with current experience with LCD displays cccceccceseeeeeeeeeeeeneeeeeeteeeeeeeetneeee Item No PLO3 2 d6 co 28 Correction to Symbol Library and Presentation Library Updating the Mariner s Navigational Symbols to IEC 61174 ed 2 2000 and IMO S N Circ 217 on AIS SyMbols 00 0 0 cee ceee cece eeeeeeeeeeeeeeeaeetneeseeeeeneetaees Item No PLO3 2 d6 co 29 Corrections to Presentation Library Mariner s option to display isolated dangers in unsafe waters shallower than the safety contour Item No PLO3 2 d6 co 30_ Corrections to C amp S Specifications and Presentation Library Organisational and editorial changes
40. m No CS04 1 d6 cl 20 Minor clarification to Colour amp Symbol Specs Annex B 4 6 1 Ishihara colour blindness test 26 Nov 01 in reply to an enquiry from Madeleine Rowles in Australia Sharon McFadden pointed out that since the ECDIS colour scheme covers the whole spectrum we should specify the full 36 plate Ishihara test and further that the test should be done under a Standard Lamp or in natural sunlight Amend Colour amp Symbol Specs Annex B 4 6 1 as to read as follows 1 The person conducting the test should have passed the full 36 plate Ishihara colour blindness test taken by mariners under a Standard Lamp or in natural sunlight The tester should adapt to night viewing for 10 minutes before checking the night display Item No CS04 1 d6 cl 21 Clarification to Colour amp Symbol Specifications 3 4 3 overbright toolbar A recent Australian enquiry into why some mariners prefer to use a dimmed day white background colour table at night lists a number of reasons for this Among them is Night tool bars too bright C amp S MD4 March 2004 19 Dark room work done early in the development of IHO Colours amp Symbols showed strikingly how a bright interface panel or in this case a toolbar can generate much more light than the entire darkened chart display thus destroying the careful work done in designing the night colour tables This problem presumably arose through a programmer not fully understanding the night
41. n Board For details see C amp S Specs section 1 2 4 C amp S MD4 March 2004 26 Item No PLO3 2 d6 cl 31_ Clarification to C amp S Specifications and Presentation Library New editions of C amp S Specifications and Presentation Library 1 C amp S12 The outcome of item 5 1 1 Procedural model for maintenance of the Presentation Library of the minutes of meeting C amp S 12 reads as follows 1 Chairman proposed that the next revision e3 3 be issued in 2002 e3 3 would bring into effect extant deferred amendments The Chairman proposed developing a work programme for consideration later in the meeting 2 The meeting supported the concept of circulating draft versions of e3 3 for evaluation prior to formal adoption at a C amp SMG 3 The meeting agreed that for consistency of IHO documentation all documents should in future be issued as new editions Any periods of grace grandfather clauses or other special implementation rules shall be included with the edition when it is released Incremental changes will be indicated 3 3 3 4 etc Major revisions will be designated by a sequential prefix 3 0 4 0 5 0 etc 2 C amp S13 The draft ed 3 3 current at the time of the meeting was duly prepared by the IHB and circulated at meeting C amp S 13 Items 12 1 and 12 2 of the minutes of meeting C amp S 13 include the following 12 1 Edition 3 3 Fee 1 500 EURO for newcomers 500 EURO as update for earl
42. n in dai format will be available as a manufacturer s option for ed 3 3 but may not be available in future The first paragraph of PresLib section 1 4 has been revised to read 1 4 Supply and amendment of the Presentation Library From edition 3 3 onwards the word processed version of the Presentation Library is the official version and this carries a subscription charge for each new edition to help to cover maintenance costs A limited digital version in dai format is provided on the same CD ROM as a manufacturer s option for edition 3 3 but may not be provided for succeeding editions It consists of look up tables symbols and colour tables and is supplied in ASCII format in the dai file The other major changes in the organisation of the PresLib are C amp S MD4 March 2004 25 1 The official version of the Symbol Library is now in word processed hard copy form as an Addendum to the PresLib 2 The introduction to the Symbol Library is now in section 14 and the Chart 1 Plots the Symbol Plots and listings and the Colour Test Diagram the old hard copy addendum of the C amp S Specs are in section 15 of the PresLib Old sections 14 Colour model on an 8 Bits graphic device and 15 References have been deleted 3 The 3 table colour system replaces the 5 table system amendment d6 co 26 5 PresLib Part Il Mariners Objects has been revised and AIS symbols added 6 The old PresLib Part Ill on Calibration So
43. nt date and time Note that this amendment item supercedes amendment item No PL03 0 d02 co 032 C amp S MD4 March 2004 11 Item No PLO3 2 d6 co 6 Correction to Presentation Library 7 4 5 2 cell boundary lines to be masked C amp S12 minutes item 5 4 14 outcome reads Canada Eaton later pointed out that PresLib section 7 4 5 2 does not mask an areas boundary with the USAG field 3 area truncated by a cell boundary and so a minor amendment to add this is required as pointed out by France C amp S 13 minutes item 6 accepted the following amendment d6 c0 6 Since cell boundary lines are not wanted on an ECDIS display section 7 4 5 2 of the PresLib should be revised as follows 7 4 5 2 Masked Lines Masked lines MASK subfield of FSPT field set to 1 and cell boundary lines edges encoded with USAG 3 should not be drawn Item No PL03 2 d6 cl 7 Clarification to Presentation Library 8 3 3 7 symbolizing an object of unknown unidentified object class C amp S12 minutes item 5 4 16 outcome reads 1 The meeting did not agree to the proposal by C Map but did accept the proposal by Canada Eaton for a minor clarification to the Pres Lib section 8 3 3 3 C amp S 13 minutes item 6 accepted the following amendment d6 cl 7 Sometimes an SENC will contain objects with an unknown or unidentifiable Object Class Attribute s or Attribute Value s This may arise from a data error or from an
44. ntield 7 of theteook uptable The manufacturer may use the viewing group scheme or not as he prefers If he does use it then in some cases a single item such as soundings 33010 should probably be selectable In other cases several groups from different sets may be combined However groups from different IMO categories should not be combined Although the viewing groups reflect the IMO category the authority for category is the classification in field 6 of the look up table The Presentation Library provides a similar classification for text see section 7 1 3 Fhe wewing greups aretisted in section 3 table2 2 Add the following entries to table 13 2 Viewing Groups 31010 accuracy of data MPCCY M_ACCY survey reliability M_SREL survey source M_SSOR quality of data M_QUAL 31011 symbol SY LOWACC01 identifying low accuracy data applied to the spatial object of point and area wrecks rocks and obstructions and to point land areas 31020 nautical publication M_NPUB 33020 depth contours DEPCNT other than the safety contour line depth area DEPARE 33021 label for the safety contour 33022 labels for all contours 33030 na Follow on changes The necessary mariner s symbol selection switches for contour labelling have been added to revised CSPs DEPARE02 and DEPCNTO3 Selection switches for the low accuracy symbol SY LOWACC01 have been added to CSP QUAPNT02 All CSPs Sept 02 version The look up tables
45. ok up table in PresLib ed 3 2 with a call to the CSP in order to ensure it received appropriate symbolization and did not default to a lower level of symbolization Now that CSP OBSTRN04 uses the else if structure OBSTRN CATOBS6 can be given the appropriate symbolization in the CSP OBSTRN CATOBS6 has now been removed from the look up table altogether and is symbolized in the CSP The case of a point OBSTRN CATOBS6 is now also symbolized in the CSP 9 SYMBOL MEANINGS EXPLANATIONS The paragraph in bold below should be brought forward from Part Ill of the Preslib edition 3 2 to section 8 on cursor picking in Part I 8 8 1 2 Interpretation A plain language explanation of each symbol is included in the Symbol Library and in the Presentation Library section 15 and this gives the mariner quick and understandable information which is not always obvious from the object class and attribute information The manufacturer should always provide these explanations to the mariner in response to a cursor pick on the symbol Attribute values provided in addition should be connected to their meaning and the definitions should also be available 10 CLARIFICATION OF LINE SUPPRESSION BY DISPLAY PRIORITY Clarify the second para of PresLib section 8 3 4 1 as follows The display priority should be used to ensure that objects that overlap each other are drawn in the right sequence Thus an object with a higher priority should be drawn after on to
46. omission in the Look up Tables and some confusion has recently arisen over how the Presentation Library deals with this situation To clarify the situation make the following changes to the Presentation Library Manual section 8 3 3 7 1 Change 8 3 3 7 to 8 3 3 7a and change the heading Make one minor change to the text 8 3 3 7a Symbolizing an object of unknown unidentified object class If there is no look up table line matching the object at all the look up table is incomplete or the object is of an unknown object class If this happens a caution should be shown on the mariners interface and a symbol QUESMRK1 symbol pattern or line style should be shown as fail safe presentation which on cursor inquiry would read out and if possible explain the object in the SENC For an area use SY QUESMRK 1 as a centred symbol and for the areas with symbolized boundaries use LC QUESMRK1 to symbolize the boundary 2 Add new 8 3 3 7b 8 3 3 7b Symbolizing an object with unknown unidentified attributes or attribute values Following section 8 3 3 2 and 8 3 3 3 in detail will result in a fail safe symbolization of the object by the default symbolization for that object class 3 Add the two new headings to the Index Item No PL03 2 d6 cl 8 Clarification to Presentation Library 8 3 3 7 identifying automatic chart corrections C amp S12 minutes item 5 5 2 discussed the matter of identifying automatic chart corrections on marine
47. ons 11 12 and 13 2 Viewing Groups to give the mariner control of contour labels and the low accuracy symbol The minutes of C amp S 13 item 7 d7 c0 2 last para and item 9 7 4 require three new viewing groups to enable the mariner to switch the following secondary symbolisation on or off independently of the primary symbolisation labels for the safety contour labels for all other contours and symbol LOWACC01 which applies to islets point LNDARE obstructions rocks and wrecks This involves more change than is obvious at first sight Two types of change are involved extending the specifications for viewing groups to cover viewing control at symbol level making the changes to CSPs needed to implement these two new viewing groups SPECIFICATIONS FOR VIEWING GROUPS Viewing Groups are on or off switches for use by the mariner to control the information appearing on the display They are generally attached to chart objects or mariners objects and occasionally to objects all of which share a common condition for example the overscale area of the display They are also attached to some non ENC features such as the scale bar This new requirement uses a viewing group to switch on off a secondary symbol which is attached to a pre existing object and its primary symbol For example a non dangerous wreck of doubtful position symbolised as SY WRECKS04 in viewing group 34050 will also be symbolised by SY LOWACC01 which in fut
48. oo ee eeeee eee eeeeeeeeeeeeeseneeeeeaeeeseaneeenseeeetaaeesesaeeeseneeeeeneeensaaes p 11 Item No PLO3 2 d6 co 9 Correction to Presentation Library 12 2 2 revision of CSP DATCVR withdrawal of symbol for units of depth oo cece eeeeeeeeeeeteeeeeeeeneees p 12 Item No PLO3 2 d6 co 10 Correction to to PresLib CSPs drawing contours from edges rather than from line depth areas ooo eee eeeceeeneeeeeneeeeeneeeeeeeneeeesaeeeeeaeeeseaeeeneaes p 13 Item No PLO3 2 d6 co 11 Correction to Symbol Library and to PresLib Look up Tables and CSPs labelling the Safety Contour and other contours a e p 13 Item PL0O3 2 d6 co 12 Correction to PresLib sections 11 12 and 13 2 Viewing Groups to give the mariner control of contour labels and the low accuracy symbol p 14 Item No PLO3 2 d6 co 13 Correction to Presentation Library section 11 Symbolisation Of AN unsurveyed area on ee eee eee eeeneeeeeneeeseeeeeeeeeeeaeeeseaeeeeeeeteseeaeeeenaeesseneeeeaes p 16 Item PL0O3 2 d6 co 14 Correction to PresLib sections12 Default depth value for wrecks rocks amp obstructions from the surrounding depth area eee p 16 Item No PLO3 2 d6 co 15 Correction to Presentation Library section 12 UOC change UNSARE underlay for non navigable rivers etc cecceeceeceeeeeeeeeeeteeeeeeeeneeees p 17 Item No PLO3 2 d6 co 16 Correction to Presentation Library section 12 UOC change LNDARE underlay for
49. oses the ECDIS should allow the mariner to view chart data for any required date and time for the purpose of reviewing pre planned changes in chart data The ECDIS manufacturer may provide this either a By allowing the mariner to select a date for displaying all chart objects active at that date and time OR b By allowing the mariner to display all objects in the ENC irrespective of the current date Information on the date and time window for which objects of interest are in existence should then be available by cursor pick report through viewing the date dependent attributes WHEN THIS OPTION IS IN USE THE MARINER MUST BE REMINDED THAT THE INFORMATION ON THE DISPLAY MAY NOT BE CORRECT FOR THE ACTUAL CURRENT DATE AND TIME 8 4 2 Scale dependant objects Some objects such as intermediate depth contours may carry the attribute SCAMIN to specify the smallest display scale at which they should be drawn At display scales smaller than SCAMIN the object should not be drawn in order to avoid clutter For example an object with a SCAMIN value of 50 000 indicating a scale of 1 50 000 should not be drawn on an ECDIS display of 1 60 000 Follow on changes 1 Add the two new headings to the index 2 Amend the third paragraph of Presentation Library Manual Part section 2 Display Generator as shown below 2 BASIC CONCEPT OF A DISPLAY GENERATOR FOR AN ECDIS SYSTEM The elements of the Presentation Library are handled by the
50. p of an object with a lower display priority However if two line objects or two area boundaries or a line and an area boundary are located at the same position and share the same extent their coordinates are identical then the line symbolization with the highest higher display priority must suppress the line symbolization of the other ae ebiect object line or area Therefore only the line symbolization of the object line or area of the higher display priority is drawn Please study the following example 11 LEGEND Presentation Library section 8 6 3 requires a Legend which includes as element 8 value of safety contour Selected by user Default is 30 metres Add to this the following If the mariner selected a contour which is not available in the ENC and the ECDIS displays a default contour both the contour selected and the contour displayed should be quoted C amp S MD4 March 2004 22 12 C SUB ROUTINE LITDSN Clarify Presentation Library 8 6 4 by making the following changes 8 6 4 Light description text strings The mariner may need to label all lights with a description in order to identify those he can see A mariner optional An eptienal light description text string is provided for this purpose as a required sub procedure of conditional symbology procedure LIGHTS05 13 IMO CATEGORY OF RIVERS AND LAKES The S57 Use of the Object Catalogue clause 5 4 8 explains that navigable Lakes Rivers Canals Lock
51. played on the ECDIS screen normally defaults from the value selected by the mariner to the next available deeper contour often by a significant amount At present isolated dangers are only highlighted by the isolated danger symbol SY ISODGR when they lie in safe waters deeper than the displayed safety contour But mariners may often be forced to navigate in unsafe waters shallower than the displayed safety contour due to lack of deep water in a harbour approach channel due to needing to take avoiding action to prevent collision and so on Conditional symbology procedure UDWHAZ has been revised to give the mariner the option of selecting show isolated dangers in shallow waters to see all rocks wrecks or obstructions of depth less than or equal to his selected safety contour highlighted by the isolated danger symbol in all waters below the drying line To implement this change use revised CSP UDWHAZ04 revise the meaning of symbol SY ISODGRO01 to isolated danger of depth less than the mariner s selected safety contour revise viewing group 14010 to isolated underwater dangers in waters deeper than the displayed safety contour and add viewing group 24020 isolated underwater dangers in waters shallower than the displayed safety contour Item No PLO3 2 d6 co 30_ Corrections to C amp S Specifications and Presentation Library Organisational and editorial changes to the C amp S Specifications and Presentation Library
52. r s demand and concluded As there are now a number of solutions that have been developed is there a requirement to impose a standardised solutions The general view was that this function need not be standardised C amp S MD4 March 2004 12 C amp S 13 minutes item 6 accepted the following amendment d6 cl 8 To clarify this in the PresLib 1 Change the title of section 8 7 to 8 7 Displaying manual updates and added non ENC chart information Identifying automatic chart corrections 2 Add a new section 8 7 1 5 8 7 1 5 Identifying automatic chart corrections on mariners demand The ECDIS manufacturer should provide a means of identifying automatic chart corrections to the SENC on demand by the mariner 3 Add the new headings to the index Item No PLO3 2 d6 co 9 Correction to Presentation Library 12 2 2 Revision of CSP DATCVR withdrawal of symbol for units of depth 1 Revised Conditional Symbology Procedure 12 2 2 DATCVR02 This symbology procedure has been revised to incorporate changes from the following existing deferred amendments amndt d02 item co 003 on identifying non HO data in section 2 1 of the CSP amndt d02 item cl 022 on overscale indications in section 4 2 of the CSP Item 7 of the minutes of meeting C amp S13 records that a the symbolization of the overscale area of a display comprising ENCs of different Navigation Purpose is to remain as the vertical Prison Bars pattern AP OVERS
53. re were two options to achieve the requirement to support time date dependent objects in ECDIS either a the ECDIS could allow the user to show time date dependent objects active at a future time date window or b the ECDIS could show all objects in the database including all time date dependent objects irrespective of the current time date Information on time date restrictions would be available via pick report In either case the user must be made aware through a continuous indication that objects in the display may not be valid at the current time date Later editorial note the attributes in question do not appear to provide a coding for time C amp S 13 minutes item 6 accepted the following amendment d6 co 5 To implement these outcomes from C amp S12 revise PresLib ed 3 2 section 8 4 to read as follows C amp S MD4 March 2004 10 8 4 Display of objects depending on date or on display scale 8 4 1 Date dependant objects Some objects such as seasonal buoys are only to be displayed over a certain period PERSTA to PEREND Other objects such as a traffic separation scheme may have a date on which they are introduced DATSTA or discontinued DATEND Any object with one of the above attributes should not normally be displayed outside its effective dates see figure 1 However to provide for effective route planning for look ahead during route monitoring or for other purp
54. s and Docks are coded as such only when the compilation scale is too small to provide adequate detail for navigation They are coded as depth areas or dredged areas at scales large enough to provide enough detail for navigation At present Canals Locks and Docks are in IMO category Base since these object classes are likely to be navigable and so to be transformed to depth areas on larger scale ENCs But in order to avoid clutter Lakes and Rivers which are less likely to become navigable at larger scale are at present in category Other This has caused trouble because the ship s destination in a navigable river may disappear on a small scale EDCIS display To remedy this problem amend the look up table to put Lakes and Rivers in Standard Display and viewing group 22010 Item No CS04 1 d6 co 26 _ Correction to C amp S Specifications section 4 Colours and Presentation Library section 13 1 Colour Tables 3 table colour system to replace the current 5 table system The 3 table colour scheme developed by Sharon McFadden of DRDC Toronto was tested in comparison with the 5 table system by Sven Herberg at the Hochschule Wismar Fachbereich Seefahrt Warnemunde in 2002 2003 using mariners as subjects see paper C amp S 14 5F As the minutes of C amp S14 item 5 9 record the two sets are very similar and the 3 table set makes ECDIS operation simpler and the outcome is that the 3 table set will replace the 5 table set in Pres
55. ss UNSARE will be increased from 0 to 3 so that the unsurveyed area boundary is less likely to be overwritten To implement this make the above changes to the look up tables and the night colour tables Item PL0O3 2 d6 co 14 Correction to PresLib sections12 Default depth value for wrecks rocks amp obstructions from the surrounding depth area The minutes of C amp S13 item 9 7 record that the proposal by Le Bihan of SHOM to eliminate the ISODGR symbol on non dangerous wrecks in deep water by changes to CSPs was accepted The initial proposal paper C amp S 13 7 9A was to run CSP DEPVAL on all wrecks and obstructions However further investigation showed problems a CSP DEPVAL was introduced when S 57 first required a DEPARE object under an area wreck The CSP was based on the assumption that the DRVAL1 of this special DEPARE would provide a realistic estimate of the least depth over the wreck However it now appears that HOs may instead be extending the surrounding DEPARE under the area wreck and may not be digitising a special DEPARE b The DRVAL1 of a surrounding DEPARE does not give a least depth over hazards in that area UOC ed 2 1 SECTION 5 4 3 defines DRVAL1 as follows For each depth area of type area DRVAL1 and DRVAL2 should be encoded with the values corresponding to the shallowest and deepest depths in that area However that apparently applies only to the general depth of the seabed it does not cover the depth over
56. time situation on the bridge ECDIS manufacturers are asked to help in suggesting measures to avoid this happening in future Meanwhile the following strengthening of the relevant section of the C amp S Specs is proposed Re word the last paragraph of the Colour amp Symbol Specifications section 3 4 3 as shown in bold below At night it is essential that any interface panel or other information added by the manufacturer to the screen carrying the chart display should never generate more light than the chart display itself Great care is taken to reduce the light emitted by the chart in order to preserve the mariners night vision and it is dangerous to ship safety if added non chart information defeats that purpose It is particularly important to limit the information shown using the conspicuous colour token UINFD which is reserved for important information Even a small panel of text in this colour can produce more light on the bridge than the entire route monitoring chart display This change is in addition to the revision in amendment CS04 0 d02 cl 027 Item No PLO3 2 d6 cl 22 Clarification to Presentation Library section 5 new example for amendment d02 co0 029 complex linestyles for curved lines Amendment PL03 0 d02 co 029 introduced short segment complex linestyles for symbolizing curved lines and area boundaries Following a report of trouble using these linestyles an example has been added to the original amendment s
57. to the C amp S Specifications and Presentation Library ccc eeeee eect eeeeneaee Item No CS04 1 d6 cl 31_ Clarification to C amp S Specifications and Presentation Library New editions of C amp S Specifications and PreSLib eee cece eeeeeeeneeeeeeeaees C amp S MD4 p 18 p 18 p 24 March 2004 S 52 APP 2 DEFERRED AMENDMENT 06 Throughout this amendment changes to the C amp S Specs and the PresLib are indicated by strikethrough for deletions and bold for additions Item No CS04 1 d6 co 1 Correction to Colour amp Symbol Specifications 1 2 3 and 1 2 4 revised Amendment Procedures C amp S12 minutes item 5 1 1 outcome 3 reads 3 The meeting agreed that for consistency of IHO documentation all documents should in future be issued as new editions Any periods of grace grandfather clauses or other special implementation rules shall be included with the edition when it is released Incremental changes will be indicated 3 3 3 4 etc Major revisions will be designated by a sequential prefix 3 0 4 0 5 0 etc C amp S12 minutes item 5 3 4 outcomes 2 and 3 read 2 The meeting agreed that better promulgation of the current edition numbers is required All documents should provide a reference to the IHO website where a list of current editions is already maintained 3 The meeting recommended that a change control history should be included in each document as they
58. ure will be in separate viewing group 31011 so that it can be switched on off without affecting the SY WRECKS04 symbol In a sense this appears as applying viewing groups as switches at symbol level rather than at object level and these symbol viewing groups are listed in section 13 2 Viewing Groups of the PresLib Manual as symbols not as objects as is the case for most other viewing groups The mariner s selection switch for this type of viewing group will always be in a conditional symbology procedure not in the look up table In specifying a symbol viewing group the PresLib will be designed to ensure that A new symbol viewing group is independent of any pre existing viewing groups affecting the same object or objects The symbolisation of the new viewing group does not interfere with any pre existing symbolisation Selecting or de selecting the new viewing group does not affect the status on or off of any other viewing group attached to the same object Systems that can already handle viewing groups related to individual cartographic symbols will simply have to implement the new CSP changes and add new viewing groups for the mariner to operate on However systems that have implemented their internal data model so that one viewing group can be assigned to an object and not it s individual cartographic symbols may have trouble with this change One way of handling the problem might be to specify the addition of some new t
59. ures and symbols 3 OFFICIAL CHART The term paper chart is longer strictly correct as some nations no longer require a paper chart to be carried with a type approved ECDIS The term official chart includes an official RNC smaller scale ENC or the paper chart In C amp S Specs section 2 3 1c Manufacturer s information on the route monitoring display para 2 sub paras ii iii and iv delete the term Unofficial data displayed Refer to paper chart and replace with Unofficial data displayed Refer to RNC or paper chart The same change is made elsewhere in S52 App 2 wherever the term paper chart occurs in this context 4 ABBREVIATIONS FOR NATURE OF THE SEABED PresLib 13 4 3 lists the abbreviations for the nature of the seabed Add the following note to this list To write out on the display Mud Sand Gravel for example causes much more clutter than writing M S G ECDIS manufacturers are encouraged to use the abbreviations both on the chart display and when providing cursor pick information C amp S MD4 March 2004 21 5 COLOUR OF SYMBOL FOR FLOATING HAZARD At present the colour of symbol FLTHAZ01 is grey CHGRD However this symbol is used for obstructions which are either standard display or more often display base such as a tunny net double coded OBSTRN WATLEV7 Table 1 of the C amp S Specs explains that on the ECDIS display grey is used for important but less critical physical features such
60. uts is still compliant The symbolization used 1 should be the same in general shape and size as the IHO version 2 should be clear and sharp so that there is no uncertainty over meaning 3 should be close enough to the IHO version to avoid ambiguity in meaning between that model and any other model of ECDIS 4 should use only the colours as specified in S 52 App 2 5 should comply with the various considerations of scientific design described in S 52 App 2 6 should comply with the priority of prominence on the display in proportion to importance to safety of navigation which is built into the Presentation Library and 7 should avoid any increase in clutter Any symbolization which does not meet these criteria is not compliant The type approval authority is strongly encouraged to contact the chairman of the IHO C amp SMWG in any case of uncertainty over differences in symbolization ideally attaching graphics to illustrate the situation The chairman of the WG will give the reason for the particular symbolization on the Test Data Plots and will comment on any perceived advantages or disadvantages of the manufacturer s version with reasons Manufacturers type approval authorities and above all mariners are always encouraged to contact the IHO over any improvements criticisms questions or comments that they may have about the ECDIS display in order that the specifications can be kept effective and up to date Address in
61. y and a reference to the list of current editions on the IHO website 2 NOTE the phrase edition revision should be changed to read edition throughout the PresLib Note that this Item No CS04 1 d6 co 1 on changes to C amp S Specifications 1 2 3 and 1 2 4 completely replaces amendment item CS04 0 i01 co 001 Item No PL0O3 2 d6 co 2 Correction to PresLib section 9 ECDIS onboard ship no longer required to accept amendments automatically remove test edition of PresLib C amp S12 minutes item 5 3 5 outcome 1 reads 1 The meeting agreed that such an option requirement for the ECDIS onboard to accept amendments directly from the updating authority should be withdrawn Accordingly appropriate action should be promulgated as a deferred amendment C amp S 13 minutes reads 5 14 Removal of the requirement in C amp S Specs section 1 2 3 para 2 for the ECDIS onboard to accept amendments amendment d6 co 2 Agreed A further consequence is that the Test edition of the PresLib is no longer required in PresLib 8 3 5 or in IEC 61174 section 6 5 1b Outcome The appropriate requirement will be deleted from the new edition 4 2 of S 52 Appendix 2 and the digital version of PresLib 3 3 will not provide it any longer The requirement to accept amendments directly had already been deleted from the PresLib by amendment PLO3 0 101 co 003 Section 9 of the PresLib has now been rewritten to reflect the optional status of the digital Pr

Maintenance Document No. 4 - March 2004

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