86-920-001N Iss 3 S4 SART User Manual
Contents
1. There are no operational differences between TEST and ON modes the rotary switch must be held in the TEST position on release it returns to the OFF position 1 Ensure compliance with all applicable Health and Safety instructions when working in proximity to a radar transmitter 2 Locate the SART within the line of sight of an operating approved marine Radar 3 Rotate the switch ring anticlockwise ie to the right to the TEST position and hold it in this position a Ifthe SART responds to the radar the red light in the base of the SART will be continuously lit and the buzzer will sound every 2 seconds b Ifthe SART does not respond to the radar the red light will flash every 2 seconds and the buzzer will not sound The SART must respond to the radar to pass the test 4 Switch off the SART by releasing the switch ring check that it returns fully to the OFF position 5 During the annual survey perform the self test and verify the SART performance by observing the response on the radar ned Ph AVY MI Indicator light Battery replacement The battery should be changed 5 years from the date of manufacture shown on the label or after use It is recommended that battery change should only be performed by an authorised McMurdo service agent in order that a complete assessment and integrity check can be performed The replacement battery kit is McMurdo part number 86 630 and contains all necessary components 7 Technical d2. overleaf for technical information Page 1 of 2 13 Declaration of Conformity page 2 Technical Construction File held by McMurdo Limited Silver Point Airport Service Road Portsmouth PO3 5PB UK Regulations and Standards applied SOLAS74 as amended Regulations WA 111 6 2 2 1V 7 1 3 IV 14 and X 3 IMO Resolution MSC 97 73 2000HSC Code 8 2 1 2 13 17 1 14 7 1 3 IMO Resolutions A 530 13 A 694 17 A 802 19 A 813 19 ITU R M 628 3 11 93 EN 61097 1 1993 IEC 61097 1 1992 EN 60945 2002 IEC 60945 2002 EC Type Examination Certificate Name of Notified Body 4 Lloyd s Register No 0038 Address of Notified Body x 71 Fenchurch Street London EC3M 4BS UK EC Type Examination Certificate MED 0450285 05 October 2004 ATTENTION The attention of the specifier purchaser installer or user is drawn to special measures and limitations to use which must be observed when the product is taken into service to maintain compliance with the above directive Details of these special methods and limitations to use are available on request and are also contained in the product installation and operator manuals BS EN ISO 9001 BS9000 CECC and CAA Approved Registered in England No 746603 Registered Office 1650 Parkway Whiteley Fareham Hampshire PO15 7AH VAT No GB 421 1393 92 86 922 Iss 3 Page 2 of 2 14 Limited Product Warranty Subject to the provisions set out below McMurdo Limited warrants t
3. S4 RESCUE SART Search And Rescue Transponder User Guide CONTENTS MAINS ne re ee 1 General description 2 SART principle of operation ns 2 Installation 2 2 ade 4 SART General Assembly 5 Operating instructions en 6 Self t st Tacillty dere 7 Battery replacement 7 Technical description ne 8 Function chart 2 22 8 Fault ln Te E 8 SEIVIEING en ee 8 DIMENSIONS 2 22 22 ee ee 9 Operation of marine radar for SART detection 10 Radar Range Scale insu de ale dee Eet 10 SES Pampers ease deinem seen 10 Radar Bandwidth ac 2 2 een aka 10 Radar Side Lobes icici seit nee ee ae En 10 Detuning the Radar 22 20 22 area 10 GITES Ne een AD en ne AS en nn ts en nm OE eet 10 Anti Clutter Sea Control 11 Anti Clutter Rain Control ss 11 Technical Specifications 12 Declaration of Conformity 13 Limited Product Warranty 15 Warnings e This SART is an emergency device for use only in situations of grave and imminent danger e False alarms cost lives and money Help to prevent them understand how to activate and disable your equipment e Read the complete manual before installing testing or using the SART e The SART contains no user servicable parts Return to your dealer for service e Dispose of this device safely Contents include Lithium batteries do not incinerate puncture deform or short circuit e This device emits radio frequency radiation when activate
4. bandwidth to ensure optimum detection of the SART The Radar operating manual should be consulted about the particular radar parameters and bandwidth selection Radar Side Lobes As the SART is approached side lobes from the antenna may show the SART responses as a series of arcs or concentric rings These can be removed by the use of the anti clutter sea control although it m ay be operationally useful to observe the side lobes as these will confirm that the SART is near to the ship Detuning the Radar To increase the visibility of the SART in clutter conditions the radar may be detuned to reduce the clutter without reducing the SART response Radar with automatic frequency control may not permit manual detuning of the equipment Care should be taken in operating the radar detuned as other wanted navigational and anti collision information may be removed The tuning should be returned to normal operation as soon as possible Gain For maximum range SART detection the normal maximum gain should be used 10 Anti Clutter Sea Control For optimum range SART detection this control should be set to the minimum Care should be exercised as targets in sea clutter may be obscured Some radar sets have automatic manual anti clutter sea control facilities in which case the operator should switch to manual Anti Clutter Rain Control This should not be used when trying to detect SARTs as the SART responses may be removed by this control Some sets
5. d Because of the levels and duty cycles such radiation is not classed as harmful However it is recommended that you do not hold the radome while the SART is activated e If the security tab is broken the SART is not compliant with SOLAS regulations and must be repaired or replaced Transportation Because it contains a primary non rechargeable Lithium battery the SART may have special transportation requirements depending on local and international regulations in force at the time The battery pack contains 6 2g Lithium in total Transport the SART in compliance with applicable regulations for this mass of hazardous material For further information refer to the McMurdo website www mcmurdo co uk General description The SART Search And Rescue Transponder is designed for survivor location during search and rescue operations CARRY OFF SART Supplied as one integral unit This is normally mounted in a bulkhead bracket supplied which is used to stow the unit on the mother vessel On abandoning to a survival craft the SART can be carried in one hand off the stricken vessel and mounted through a port in the canopy of the survival craft using the telescopic pole The main body of the SART is high visibility orange thermoplastic attached to the sealed replaceable battery pack by stainless steel fastenings The joint is sealed against water ingress by an O ring Operation is by a rotating switch ring providing ON OFF and TEST functio
6. elease clip and lift SART from bracket To switch on Break the security tab away from the body of the SART Rotate the switch ring clockwise ie to the left to the ON position marked by 1 Switch ring Security tab To extend the telescopic pole 1 Grasp rubber cover at bottom of pole and twist the pole to release it in the pole mount Pull the pole down and twist to lock in place in the pole mount 2 Remove rubber cover from bottom of pole allow pole sections to drop Lock sections together by twisting each section To deploy in a survival craft liferaft Extend the SART supporting pole as detailed above Tether the SART to a suitable point using the lanyard which unwinds from its base Inset the SART through the port in the canopy Position the bottom of the support pole in the antenna pocket Secure the pole to the canopy support Some survival craft have the SART already packed as part of the inventory In general these models of SART are not fitted with the support pole The SART should be switched ON then suspended by its top loop from the highest point of the survival craft If the lanyard becomes unwound it may be rewound by rotating the spool in the base of the SART in the direction of the arrow 6 Self test facility Regular testing of the SART is advised The duration of the test should be limited to as short a time as possible as the SART response may be received by other vessels which are within range
7. escription A single switched antenna is used for both receive and transmit functions the switch normally connects the antenna to the receiver circuit In the standby state only the receiver portion of the SART is powered to reduce battery consumption to a minimum In this condition the indicator circuit causes the LED to flash once every two seconds On receipt of a radar pulse the video amplifier and detector circuit causes the rest of the circuitry to become active and the unit switches to transmit mode In this condition the indicator circuit causes the LED to remain steady and the buzzer to sound every two seconds The detection of a radar pulse causes the switch to connect the antenna to the transmitter circuit The output stage is fed by a Voltage Controlled Oscillator VCO whose frequency is determined by a sweep generator When triggered by the detector the sweep generator turns on the VCO and causes it to produce exactly 12 forward and reverse frequency sweeps before shutting down again If no radar pulses are detected for a period of 15 seconds the unit reverts to standby mode Function chart RED LED TEST or ON EVERY 2 SECONDS STANDBY MODE FLASHING ON ACTIVELY TRANSPONDING TEST or ON EVERY 2 SECONDS Fault Finding Fault finding is limited to performing the self test and verifying the SART response on the radar Servicing The SART contains no user serviceable parts and consequently should be returned t
8. f echoes which are not synchronized with the radar s own transmissions so one radar will not normally be confused by a SART s response to a neighbouring radar The SART indicates that it has been triggered by lighting an indicator LED continuously it flashes in standby mode and by sounding an integral buzzer If no radar pulses are detected for a period exceeding 15 seconds the SART reverts to standby mode Installation The preferred mounting location is inside the vessel and protected from the elements usually on the ship s bridge wing The SART should be mounted where it will not get in the way of day to day operations but where it can readily be accessed near an emergency exit in the event it is needed Do not install the SART within the ship s radar beam Fix the mounting bracket to a bulkhead in a convenient location The recommended fixing is by M5 marine grade stainless steel eg A4 316 bolts length is dependent upon application The bolts should be secured with either stainless steel locking nuts or stainless steel nuts with stainless steel shakeproof washers Mount the SART dome uppermost onto the bracket by locating the lugs on the SART pole mount into the slots in the bracket Push down the SART into place 58mm 73mm Figure 1 Bracket mounting holes 4 holes 5 5mm diameter NOTE Safe compass distance 1 5m Assembly SART Genera Operating instructions Remove from bulkhead bracket R
9. hat this product will be free of defects in materials and workmanship for a period of 12 months from the date of purchase McMurdo Limited will not be liable to the buyer under the above warranty e for any defect arising from fair wear and tear wilful damage negligence abnormal working conditions failure to follow McMurdo Limited s instructions whether oral or in writing including a failure to install properly and or to use batteries recommended and or supplied by McMurdo Limited misuse or alterations or repair of the product by persons other than McMurdo Limited or an Approved Service Agent e for parts materials or equipment not manufactured by McMurdo Limited in respect of which the buyer shall only be entitled to the benefit of any warranty or guarantee given by the manufacturer to McMurdo Limited for the battery storage life which is specifically excluded from this warranty if the total price for the product has not been paid McMurdo Limited does not make any other promises or warranties express implied or statutory about the product except where the product is sold to a consumer in which case the statutory rights of a consumer are not to be affected In order to be valid claims must be made under the above warranty in writing as soon as practicable after discovery of the defect or failure and within the warranty period referred to above Proof of purchase will be required The claim should be sent together with the product in q
10. have automatic manual anti clutter rain control facilities in which case the operator should switch to manual Radar Displays These sketches show the appearance of a SART response at different ranges SART response SART response SART response from distant from liferaft at close to vessel liferaft 5 6 miles medium range 2 3 lt 1 mile miles Display now Note widening of shows rings echos caused by strength of signal 11 Technical Specification FREQUENCY 9 2GHz 9 5GHz POLARIZATION SWEEP RATE 5us per 200MHz nominal RESPONSE 12 sweeps SIGNAL PULSE EMISSION 100us nominal FORM OF SWEEP Forward 7 5us 1us Reverse 0 4us 0 1us EIRP gt 400mW 26dBm RX SENSITIVITY Better than 50dBm 0 1 mW m Note 1 DURATION 96 hours in standby condition followed by a minimum 8 hours of transmission while being continuously interrogated with a pulse repetition frequency of 1kHz TEMP RANGE Operating 20 C to 55 C et an as Saal Storage 30 C to 65 C RECOVERY TIME Following excitation 10us or less ANTENNA HEIGHT Greater or equal to 1m Note 2 RESPONSE DELAY 0 5us or less ANTENNA BEAM Vertical 12 5 degrees BEREIT Azimuth Omnidirectional to 2dB WEIGHT SART only SART pole SART complete DIMENSIONS Overall in bracket 283 x 101 x 90mm BUOYANCY 1 Effective receiver sensitivity includes antenna gain 2 The effective antenna height applies to equipment requi
11. n with the echoes dotted around it Echoes further from the centre of the screen are thus further from the ship and the relative or true bearing of each echo can be easily seen 2 The SART operates by receiving a pulse from the search radar and sending back a series of pulses in response which the radar will then display as if they were normal echoes The first return pulse if it sent back immediately will appear in the same place on the PPI as a normal echo would have done Subsequent pulses being slightly delayed appear to the radar like echoes from objects further away A series of dots is therefore shown leading away from the position of the SART This distinctive pattern is much easier to spot than a single echo such as from a radar reflector Moreover the fact that the SART is actually a transmitter means that the return pulses can be as strong as echoes received from much larger objects A complication arises from the need for the SART to respond to radars which may be operating at any frequency within the 9GHz band The method chosen for the SART is to use a wideband receiver which will pick up any radar pulses in the band in conjunction with a swept frequency transmitter Each radar pulse received by the SART results in a transmission consisting of 12 forward and return sweeps through the range 9 2GHz to 9 5GHz The radar will only respond to returns close to its own frequency of operation ie within its receive bandwidth so a
12. ns The ON position is reached by breaking a security tab The switch ring is spring loaded so that it returns automatically from the TEST position The Lithium battery is fitted with internal overload protection and has a five year storage life Non reversible electrical connections are provided in the SART body and battery pack to facilitate battery replacement Each SART carries a unique serial number on the label on the orange body LIFERAFT SART Supplied with or without mast Normally is packed as part of the liferaft equipment The mast version is mounted in the same manner as the carry off version the version without the mast is intended to be hung from the highest point inside the liferaft The SART itself is identical with the carry off version SART principle of operation Actuating a SART enables a survival craft to show up on a search vessel s radar display as an easily recognised series of dots RADAR radio detection and ranging is a device carried by most ships which is used to determine the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns A typical ship s radar will transmit a stream of high power pulses on a fixed frequency anywhere between 9 2GHz and 9 5GHz It will collect the echoes received on the same frequency using a display known as a Plan Position Indicator PPI which shows the ship itself at the centre of the scree
13. o an authorised McMurdo service agent for repair Ensure compliance with the appropriate regulations for transportation of Lithium material as detailed in the Transportation section on the front inside cover Dimensions Operation of marine radar for SART detection Radar Range Scale When looking for a SART it is preferable to use a range scale between 6 and 12 nautical miles This is because the spacing between the SART responses is about 0 6 nautical miles 1125 metres and it is necessary to see a number of responses to distinguish the SART from other responses SART Range Errors There are inherent delays in the SART responses the SART has a trigger delay and may also have to sweep through the whole radar band before reaching the frequency of the search radar At medium ranges of about 6 nautical miles the range delay may be between about 150 metres and 0 6 nautical miles beyond the SART position As the SART is approached the radar delay of the first dot should be no more than 150 metres beyond the SART position Radar Bandwidth This is normally matched to the radar pulse length and is usually switched with the range scale and the associated pulse length Narrow bandwidths of 3 5MHz are used with long pulses on long range and wide bandwidths of 10 25MHz with short pulses on short ranges Any radar bandwidth of less than 5MHz will attenuate the SART signal slightly so it is preferable to use a medium
14. pulse is produced at the radar input each time the SART sweep passes through the correct frequency The text and diagrams on Pages 10 amp 11 show this in more detail A slow sweep would give the radar a stronger echo to deal with as the sweep would be inside the operating bandwidth for a longer period The delay for the sweep to reach the operating frequency may however lead to an unacceptable range error as delayed echoes appear to be coming from more distant objects To minimise this problem the SART uses a sawtooth response sweeping quickly then slowly for each of its twelve forward and return sweeps At long range only the slow sweeps giving the strongest returns are picked up At close range where errors are more important the fast sweeps are also detected As the first sweep is a fast one then the range error is minimised and should be less than 150 metres The timescale over which all this occurs is very short Each fast sweep takes about 0 4us each slow sweep about 7 5us The complete series of twelve forward and return sweeps is therefore complete within 100us Displayed on the PPI the spacing between each pair of dots will be 0 6 nautical miles On along range setting a typical radar will be triggering the SART every millisecond but only during the period that the rotating radar scanner is pointing in the correct direction Most modern radars use sophisticated noise rejection techniques which prevent the display o
15. red to meet Regulation 6 2 2 of Chapter IIl and 7 1 3 and 8 3 1 of Chapter IV of the 1988 Amendments to the 1974 SOLAS Convention Standards Complies with IMO Resolution A 802 19 Test and Approval Standards are specified on the Declaration of Conformity following 12 Declaration of Conformity Silver Point 57 Airport Service Road Er Nos mcmurdo Hampshire UK r PO3 5PB Int 44 0 23 9262 3900 www mcmurdo co uk EC DECLARATION OF CONFORMITY The following products comply with the essential requirements of Council Directive 96 98 EC on the approximation of the laws of the member States relating to Marine Equipment as amended by Commission Directives 98 85 EC 2001 53 EC 2002 75 EC and 2002 84 EC and by the application of an EC Type Examination Certificate as detailed overleaf Products covered by this Declaration Product Type Search and Rescue Transponder SART Models McMurdo S4 RESCUE SART Sailor SART II Skanti SART II RFD S4 RESCUE SART Intended usage of products All vessels which must comply with IMO SOLAS regulations in coastal or International waters Surveillance conformity assessment is undertaken in accordance with Production Quality Assurance Module D by Lloyd s Register No 0038 71 Fenchurch Street London EC3M 4BS United Kingdom The product will carry this Conformity Marking Issued on behalf of McMurdo Limited Signed Name Title Technical Director Date 20 Nov 2064 See
16. uestion to the address set out below or to an Approved Service Agent Following a valid warranty claim McMurdo Limited shall be entitled to repair or replace the product or part in question free of charge or at McMurdo Limited s sole discretion to refund to the buyer the price of the product or a proportional part of the price McMurdo Limited shall not be liable to a buyer who is not a consumer for any other loss or damage whether indirect special or consequential loss of profit or otherwise costs expenses or other claims for compensation which arise out of or in connection with this product In the case of a consumer McMurdo Limited shall only be liable where other loss or damage is foreseeable Nothing shall limit McMurdo Limited s liability for death or personal injury caused by its negligence This warranty is to be interpreted under English law All enquiries relating to this warranty or Approved Service Agents should be sent to McMurdo Limited Silver Point Airport Service Road Portsmouth Hampshire PO3 5PB UK Telephone Int 44 0 23 9262 3900 Fax Int 44 0 23 9262 3998 Web www mcmurdo co uk Email service mcmurdo co uk 15 User Notes 16 This page contains no other data 17 86 920 001 Issue 3
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