99-005N Issue 5 Service Manual Other products · Strobe Bright light, electrical shock Avoid staring at light, allow high voltage to discharge Radio frequency ... 330 and 340 are

Service manual Other Products

Commercial in confidence

99-005N Issue 4

Contents 1. Introduction ............................................................................................................................ 1

1.1. Applicability ..................................................................................................................... 1 1.2. Safety notices .................................................................................................................. 2

2. Personal Location Beacons (PLB) ........................................................................................ 5 2.1. Applicability ..................................................................................................................... 5 2.2. Function .......................................................................................................................... 5 2.3. Support............................................................................................................................ 5 2.4. Assessment ..................................................................................................................... 6 2.5. Battery identification ........................................................................................................ 6 2.6. Battery replacement ......................................................................................................... 6 2.7. Spares ............................................................................................................................. 6 2.8. Programming an identity .................................................................................................. 7

3. LDT26 PLB.............................................................................................................................. 9 3.1. Applicability ..................................................................................................................... 9 3.2. Function .......................................................................................................................... 9 3.3. Support............................................................................................................................ 9 3.4. Assessment ....................................................................................................................10 3.5. Battery replacement ........................................................................................................10 3.6. Spares ............................................................................................................................10

4. RT230 PLB .............................................................................................................................11 4.1. Applicability ....................................................................................................................11 4.2. Function .........................................................................................................................11 4.3. Support...........................................................................................................................11 4.4. Assessment ....................................................................................................................12 4.5. Battery replacement ........................................................................................................12 4.6. Spares ............................................................................................................................12

5. LDT61 EPIRB .........................................................................................................................13 5.1. Applicability ....................................................................................................................13 5.2. Function .........................................................................................................................13 5.3. Support...........................................................................................................................13 5.4. Programming ..................................................................................................................13 5.5. Assessment ....................................................................................................................14 5.6. Battery replacement ........................................................................................................14 5.7. Spares ............................................................................................................................14

6. RT160 EPIRB .........................................................................................................................15 6.1. Applicability ....................................................................................................................15 6.2. Function .........................................................................................................................15 6.3. Support...........................................................................................................................15 6.4. Assessment ....................................................................................................................16 6.5. Programming ..................................................................................................................16 6.6. Battery replacement ........................................................................................................16 6.7. Spares ............................................................................................................................16 6.8. Model variants ................................................................................................................16

7. Ocean Sentry .........................................................................................................................17 7.1. Applicability ....................................................................................................................17 7.2. Function .........................................................................................................................17 7.3. Support...........................................................................................................................17 7.4. Hazard warning – radio frequency radiation ....................................................................17 7.5. Assessment ....................................................................................................................18 7.6. Battery replacement ........................................................................................................18 7.7. Spares ............................................................................................................................18

8. NAVTEX 2000 receiver ..........................................................................................................19 8.1. Applicability ....................................................................................................................19 8.2. Function .........................................................................................................................19 8.3. Support...........................................................................................................................19 8.4. Assessment ....................................................................................................................19 8.5. Battery replacement ........................................................................................................20 8.6. Spares ............................................................................................................................20


99-005N Issue 4

9. EMERGENCY RECEIVER ..................................................................................................... 21 9.1. Applicability .................................................................................................................... 21 9.2. Function ......................................................................................................................... 21 9.3. Operation guidelines ...................................................................................................... 21 9.4. Controls ......................................................................................................................... 22 9.5. Settings .......................................................................................................................... 23 9.6. Operation ....................................................................................................................... 23 9.7. Squelch .......................................................................................................................... 23 9.8. Specification................................................................................................................... 24 9.9. Connecting cable ........................................................................................................... 24 9.10. Glossary......................................................................................................................... 24 9.11. Accessories ................................................................................................................... 24 9.12. Spares ........................................................................................................................... 24

10. DIRECTION FINDER ......................................................................................................... 26 10.1. Applicability .................................................................................................................... 26 10.2. Function ......................................................................................................................... 26 10.3. Specification................................................................................................................... 27 10.4. Direction Finder components .......................................................................................... 27 10.5. Display unit .................................................................................................................... 28 10.6. Installation ...................................................................................................................... 29 10.7. Indicators ....................................................................................................................... 30 10.8. Interface ......................................................................................................................... 31 10.9. Operation of the Direction Finder .................................................................................... 32 10.10. Display Offset ............................................................................................................ 33 10.11. Display mounting template ......................................................................................... 34 10.12. Spares ....................................................................................................................... 34

11. GUARDIAN WATCH .......................................................................................................... 35 11.1. Introduction .................................................................................................................... 35 11.2. Emergency operation ..................................................................................................... 35 11.3. Watch Time Functions .................................................................................................... 36 11.4. Service ........................................................................................................................... 37 11.5. Spares ........................................................................................................................... 37 11.6. Training Watch ............................................................................................................... 38 11.7. Battery reset................................................................................................................... 38

This document is Orolia Ltd copyright (©) and contains proprietary owned intellectual property rights and confidential data. All rights are strictly reserved. The information must not be used except for the agreed purpose. Unauthorized use, reproduction or issue to any third party is not permitted without the prior written authority of Orolia Ltd. This document is to be returned to Orolia Ltd when the agreed purpose is fulfilled.


Page 1 99-005N Issue 4

1. INTRODUCTION 1.1. Applicability This section covers a range of products. In all cases the principal product is listed first in bold, with variants shown where applicable. No service information, other than that provided on the Service Sheets in this section, is available. Direction Finder (RT202) Emergency Receiver Guardian watch LDT26 LDT6I LDT62 MCM330 RT330, SOS Rescue B MCM340 LDT126, RT340, SOS Rescue PLB Navtex 2000 Ocean Sentry (RTE) RTI60M RT161M, RT162M, RA406, RB406 RT230 RT235, RT240, RT250 In most cases limited spares are available. Normal procedure is to replace any faulty device with a current equivalent. However, if it is essential that any listed product is serviced, contact Orolia Ltd for advice.

IMPORTANT Orolia Ltd disclaims any responsibility for the products of other manufacturers unless specifically listed above. This applies even in cases where the product bears a resemblance to the listed Orolia Ltd product. Examples of such disclaimed products are:

Locat 25, Locat 31, Locat 50, Locat 55/56/57, Locat 63



1.2. Safety notices Please read the following information for your safety: These products have been assessed as presenting negligible hazard in a sealed serviceable state, except in the case of the Ocean Sentry RTE operating under overload conditions. This condition is discussed on the RTE service sheet. Safety analysis The following table summarises the nature of the hazard which may or may not be present, depending on the particular product, when a unit is opened or serviced; each hazard is discussed at greater length in the detailed sections. Hazard cause Hazard identification Precautions Lithium battery Explosive risk, corrosive fumes, fire,

biological hazard Handle appropriately, avoid contact

Strobe Bright light, electrical shock Avoid staring at light, allow high voltage to discharge

Radio frequency radiation

Physiological hazard Avoid close or prolonged exposure

Adhesives Skin irritation, fumes Avoid contact, ventilate well IPA Irritation, highly flammable Avoid contact, ventilate well Silicone grease Skin irritation (low risk) Avoid contact Lithium batteries

Hazardous chemicals Wear gloves The batteries used in these products contain Lithium (Li). Lithium is flammable, reacts violently with water and constitutes a biological hazard. These batteries are HAZARDOUS if short-circuited, punctured, incinerated or deformed. Lithium batteries must not be short circuited. Lithium batteries must be handled, transported and disposed of using appropriate safety precautions. The use of rubber gloves as a routine precaution is recommended. In the event of leakage of the battery electrolyte (which can be recognised by a pungent odour), take care to avoid contact, particularly with open wounds; do not ingest the material. Do not attempt to discharge a leaking battery – remove it using appropriate handling materials and seal in a plastic bag, then dispose of it through an approved environmental disposal agent, or in accordance with local regulations. Strobe radiation The Xenon strobe lights fitted to EPIRBs produce intense flashes of light. No damage is likely to be caused by intermittent exposure, but prolonged exposure should be avoided. Dismantling EPIRBs exposes the operator to the high voltage used in strobes. Ensure that the voltage is allowed to discharge, by waiting for a period of 5 minutes, before handling.

Radio frequency radiation

Radio frequency radiation An EPIRB emits radio frequency radiation when it is activated. The radiated level is below 13W with a duty cycle of 1%. Due to the low duty cycle this is not considered to be a hazard. A PLB emits less than 100mW of radiation, which is not considered a hazard. A RTE emits microwave radiation when it responds to a radar. The radiated level is below 1W with a typical duty cycle below 1% and is not a hazard. However, under overload conditions a RTE may

HIgh voltage



transmit 1W continuously. Exposure must be limited. Keep at least 12cm (5") away from the casing. Only hold the (active) RTE for 5 seconds at a time. A SART emits microwave radiation when it responds to a radar. The radiated level is below 2W with a duty cycle below 1%. The low duty cycle means this is not considered to be a hazard. General precautions for chemical agents (adhesives, greases, IPA) Observe all safety precautions relevant to the country of operation. As a general rule, protective overalls, gloves and goggles should be worn when handling these chemical agents, but different countries may have additional requirements which must be observed. Ensure that all chemical agents are handled in accordance with the manufacturer's instructions, and that suitable protective clothing is worn. Make sure that the working area is well ventilated, and that chemical substances are not left exposed. Observe good hygiene practices; do not eat, drink or smoke when handling chemicals. Cyanoacrylate adhesives bond instantly on contact. If skin is bonded, it can usually be released by a gentle peeling action; above all, do not panic and avoid direct pulling on bonded skin. Read the manufacturer's instructions before using any chemical agent.

Wear goggles Wear overalls Wash hands Wear gloves





2. PERSONAL LOCATION BEACONS (PLB)

2.1. Applicability This section applies to the PLBs listed below. There are two main types, which will for convenience be referenced as 330 and 340, as shown, in addition to other models.

330 (MCM330 - FCC) RT330 / SOS Rescue B

340 (MCM340 - ETSI) RT340 / LDT126 / SOS Rescue PLB

2.2. Function 330 and 340 are handheld radio distress beacons which use the COSPAS-SARSAT satellite system to alert rescue services. Both use the standard 121.5MHz frequency; 330 additionally uses the standard 243MHz frequency. The satellite systems provide a position fix to within 20km. The distress signal is a swept audio tone, which both alerts the orbiting satellites and also is used as a local homing signal to direct rescuers using direction finding equipment. A Morse coded identity may be programmed to identify the user. Both PLBs have the facility for automatic activation when immersed in water. 2.3. Support This product is obsolete. No support is available.

MCM330 MCM340 RT330 RT340 LDT126 SOS Rescue B SOS Rescue PLB



2.4. Assessment Functional test Press the ON/TEST switch down and hold it in position. The red lamp should illuminate steadily to indicate a functioning unit. Operation may also be verified using a suitable 121.5 MHz receiver. 2.5. Battery identification During the lifetime of these products there have been many variants of battery carrying various identity markings. These have now been standardised to two types: the 330-type (11 V) battery and the 340-type (9 V) battery, as shown below.

340 type (ETSI 9 V) P/N 85-166-001 330 type (FCC 11 V) P/N 85-167-001 IMPORTANT: To avoid confusion, do not quote any other battery identification when ordering. 2.6. Battery replacement The battery must be changed if its expiry date has been passed, or if the beacon has been used for more than 3 hours. The battery may be inserted in two positions, to allow or disable activation of the beacon when it is immersed. ON or OFF is displayed in the WATER SWITCH window on the beacon as appropriate. Changing the battery

Use a screwdriver to open one clip gently and disengage the battery Repeat for the other clip, then withdraw the used battery completely Align the new battery so that the WATER SWITCH is ON or OFF as desired Push the battery into position until both clips engage fully Fit the tamper seal supplied with the battery across the ARM switch

2.7. Spares FCC 330-type battery (11 V) 85-167-001 330-type antenna 85-169

ETSI 340-type battery (9 V) 85-166-001 340-type antenna 85-168 NOTE: The labelling on the battery pack fitted to the unit may be different. At one time the following numbers were used: 85-117 and 85-116. Please ignore these numbers. Identify as above.



2.8. Programming an identity The Morse Utility kit, 85-006, may be used to program a Morse coded identity of up to 11 characters into the beacon. Once programmed, an activated beacon transmits its identity every 2 minutes. Complete instructions are provided with the kit; for convenience, parts of the instruction sheet are reproduced below. MORSE PROGRAMMING KIT Purpose Morse utility kit 85-006 can be used to program (or erase) a Morse coded identity into any of these 121.5MHz or 121.5/243MHz radio distress beacons: i McMurdo MCM330 or MCM340 i Nova Marine RT330 or RT340 i Pains Wessex SOS Rescue PLB i Pains Wessex SOS Rescue B i Pastime Locat LDT126 NOTE: Single frequency units with serial number less than 00999 are not compatible with this utility and cannot be coded with a unique identity. Contents The kit consists of adaptor 85-224, software 85-227 and this instruction sheet. It is used on a PC- compatible computer with a serial port. Hardware installation Special programming adaptor 85-224 has a standard a 9-way connector which is plugged directly into either COM1 or COM2 on the PC. The adaptor replaces the beacon's battery during programming. It contains a battery good for 10,000 programming cycles comprised by non-hazardous Lithium Manganese-Dioxide cells which have a 10 year shelf life. Software installation Utility disk 85-227 contains the file MORSE.EXE which runs under DOS. This file can either be run directly from the utility disk (by typing A:MORSE at the DOS prompt), or the file can be transferred to a hard disk and run from there. Instructions Programming instructions are shown on-screen. The sequence of events is important. If programming fails (lamp does not flash) repeat the sequence from the top. This is essential because the beacon only allows a single programming attempt each time it is turned on. Some laptops fail on the first attempt because the port has to be woken up. Up to 11 characters may be programmed. Consult local authorities on what identity is acceptable. The primary aim is to provide the rescue services with information on the beacon's owner so that they may confirm it is not a false alarm. The obvious choice for small boats is a (licensed) VHF radio call sign. Large vessels may have an MMSI, which is a satellite call sign. Other schemes, including vessel registration numbers, may be operated locally. For emergency land use a contact telephone number is one possible option. A successfully programmed beacon will transmit its Morse code identity when it is first turned on and it will repeat at 2 minute intervals. While Morse is being sent, the beacon lamp stays on continuously. A typical identity takes 5-10 seconds to send. Short range reception is possible on a standard FM radio tuned to approx 100MHz.





3. LDT26 PLB

3.1. Applicability This section applies to the LDT26 PLB. 3.2. Function The LDT26 is a handheld radio distress beacon which uses the COSPAS-SARSAT satellite system to alert rescue services. It transmits on the standard 121.5MHz and 243MHz frequencies. The satellite systems provide a position fix to within 20km. The distress signal is a swept audio tone, which both alerts the orbiting satellites and also is used as a local homing signal to direct rescuers using direction finding equipment. 3.3. Support This product is obsolete. No support is available.



3.4. Assessment Functional test The functional test is to activate the PLB. To avoid making a distress transmission, this must either be done in a screened environment or be limited to less than 10 seconds. Carefully remove the spilt ring from the activation plunger; avoid damaging the security seal. Remove the plunger and check that the TRANSMIT lamp (in the base of the PLB) illuminates. Replace the plunger and refit the spilt ring. DO NOT TEST FOR MORE THAN 10 SECONDS UNLESS IN A SCREENED ENVIRONMENT. 3.5. Battery replacement The LDT26 is a totally sealed unit. It is not practical to change the battery. 3.6. Spares No spares are available.



4. RT230 PLB

4.1. Applicability This section applies to the RT230, RT235, RT240 and RT250 PLBs. 4.2. Function The RT230 series are handheld radio distress beacons which use the COSPAS-SARSAT satellite system to alert rescue services. They transmit on the standard 121.5MHz and 243MHz frequencies. The satellite systems provide a position fix to within 20km. The differences between the various models are shown in the table:

Frequency 121.5MHz

Frequency 243MHz

Battery 12V

Battery 9V

RT230 } } } RT235 } } RT240 } } RT250 } } The distress signal is a swept audio tone, which both alerts the orbiting satellites and also is used as a local homing signal to direct rescuers using direction finding equipment. 4.3. Support These are obsolete products. No support is available.

RT230 RT235 RT240 RT250



4.4. Assessment Functional test The functional test is to activate the PLB. To avoid making a distress transmission, this must either be done in a screened environment or be limited to less than 10 seconds. Pull the toggle to remove the switch block and activate the beacon. Check that the TRANSMIT lamp (in the top of the PLB) illuminates. Replace the switch block. DO NOT TEST FOR MORE THAN 10 SECONDS UNLESS IN A SCREENED ENVIRONMENT. 4.5. Battery replacement Replacement batteries are now obsolete. 4.6. Spares No spares are available.



5. LDT61 EPIRB

5.1. Applicability This section applies to the LDT61 and the LDT62. 5.2. Function LDT61 is an EPIRB (Emergency Position Indicating Radio Beacon) which when actuated sends a distress signal to the orbiting COSPAS-SARSAT satellite system, which in turn alerts the rescue authorities. The distress transmission is at 406.025MHz; there is also a 121.5MHz transmission to allow the active beacon to be pinpointed using direction finding equipment. 5.3. Support This product is obsolete. No support is available. 5.4. Programming Early models of the LDT61 were programmed magnetically. This method is no longer supported and no information is available. Later models were programmed optically using a ARG5411 message reader. The process is identical to that used for programming the LDT61A; it is fully described in the LDT61A Service Manual, to which reference should be made.

LDT61 LDT62



5.5. Assessment Functional test

i Despite earlier documentation, it is not practical to test the LDT61 when it is in the housing. It must be removed for this test.

i Depress the switch and hold for at least 5 seconds. There should be a strobe flash, an audible tone and a LED indication. (NOTE: the LED can only be seen when looking down – along the axis of the antenna – onto the strobe housing. The LED may change colour during the test. The final colour is the indication.)

i If the LED indication is green, the LDT61 has passed the test. i Return the switch to the ARMED position (up). i Refit the EPIRB into the housing, if appropriate.

5.6. Battery replacement Because of the age of this product, Orolia Ltd no longer offer a battery replacement. The recommended action is to replace the product with a current EPIRB. 5.7. Spares None available.



6. RT160 EPIRB

6.1. Applicability This section applies to the RT160M EPIRB and to its variants RT161M, RT162M, RA406 and RB406. 6.2. Function RT160 is an EPIRB (Emergency Position Indicating Radio Beacon) which when actuated sends a distress signal to the orbiting COSPAS-SARSAT satellite system, which in turn alerts the rescue authorities. The EPIRB is released automatically from its mount if the vessel sinks, and may also be actuated manually. The distress transmission is at 406.025MHz; there is also a 121.5MHz transmission to allow the active beacon to be pinpointed using direction finding equipment. (Very early models also transmitted on 243MHz.) 6.3. Support This product is obsolete. No support is available.

RT160M RT161M RT162M RA406 RB406



6.4. Assessment Functional test Hold the unit with the beacon uppermost, avoid shorting the sea switch contacts and push the TEST switch up (i.e. in the direction of the arrow).

RT160: Press TEST for 1 minute. The beacon lamp should flash; the red '406' lamp should

illuminate, fade and re-illuminate (over a period of ~50s); the red '121.5' lamp should flash continuously; the red BATT lamp should remain illuminated throughout.

RT161: Press TEST momentarily. The beacon lamp should flash and the red TX lamp should

illuminate. The EPIRB should deactivate automatically after 10 – 15 seconds. RT162: Press TEST for 1 second. The beacon lamp should flash and the red TX lamp should

illuminate. The EPIRB should deactivate automatically after 10 – 15 seconds. 6.5. Programming Programming the EPIRB involves breaking the seals and fully disassembling the unit. The information is held in EPROM fitted on the rear of the main circuit board. Additional equipment required is a PC-compatible computer, the EPROG programming software, a UV EPROM eraser and a EPROM programmer. The required information is assembled by the EPROG program, then programmed into the previously-erased EPROM. The EPROM is then refitted to the EPIRB, which is then fully assembled, functionally tested and finally subjected to a leak test to verify its sealing. 6.6. Battery replacement Because of the age of this product, Orolia Ltd no longer offer a battery replacement. The recommended action is to replace the product with a current EPIRB. 6.7. Spares No spares are available. 6.8. Model variants Model Bracket Battery Flash Approval RT160M Hinged end plates Li/SO2 Tungsten UK RT161M Hinged end plates Li/Mn Xenon USA RT162M Hinged end plates Li/Mn Xenon Canada RA406 Strapped Li/SO2 Xenon USA RB406 Strapped Li/SO2 Xenon UK



7. OCEAN SENTRY

7.1. Applicability This section applies to the Ocean Sentry RTE. 7.2. Function The Ocean Sentry is an active system which enhances the echo received by a ship's radar. The incoming signal is amplified and retransmitted, so providing a much stronger return signal. The Ocean Sentry provides a visible indication of a received signal, which can be arranged to sound an alarm. 7.3. Support This product is no longer manufactured. No support is available. 7.4. Hazard warning – radio frequency radiation The RTE emits microwave radiation when it responds to a radar. The radiated level is below 1W with a typical duty cycle below 1% and is not a hazard. Under overload conditions a RTE may transmit 1W continuously. Exposure at such times must be limited. Keep at least 12cm (5") away from the casing. Only hold the (active) RTE for 5 seconds at a time.

Radar Target Enhancer (RTE)



7.5. Assessment Functional test Hold down the TEST button on the control box. All control lamps should illuminate and all audible alarms should sound. When the TEST button is released the "Interrogated" lamp should extinguish. 7.6. Battery replacement Not applicable. Powered by external source. 7.7. Spares Antenna

Metal cover plate 86-152 Sealing grommet 86-143 'O' ring seal 86-153 Label 86-136 Silica gel sachet 80-7009

Control box

Terminal block 86-151 Foam pad 86-160 Front label black 86-161 Front label white 86-172 Control box complete, black 86-140 Control box complete, black 86-168

Cable, 30m 86-128 Please contact Orolia Ltd Customer Service for spares availability.



8. NAVTEX 2000 RECEIVER

8.1. Applicability This section applies to the NAVTEX 2000 receiver. 8.2. Function NAVTEX 2000 is an integrated radio receiver and printer. It receives GMDSS messages on the standard 518KHz frequency and prints a record of these messages. The unit is set to print navigational warnings, meteorological warnings and search and rescue reports. Additionally, ice reports, meteorological forecasts, pilot messages, Decca messages, Loran-C messages and Omega messages may be selected for printing. 8.3. Support This product is obsolete. No support is available. 8.4. Assessment Functional test

Push the TEST switch up. The NAVTEX should print a list of the reports it is set to receive.



8.5. Battery replacement Not applicable. Externally powered 8.6. Spares None available.



9. EMERGENCY RECEIVER 9.1. Applicability This section applies to the MOB Emergency Receiver, otherwise identified as the RT-100 Crewsaver. 9.2. Function The Emergency Receiver is a 121.5 MHz receiver with optional filtering of received signals and alarm facilities. It is envisaged that service agents will be asked to service and adjust these receivers. Accordingly, the user manual is reproduced here, together with additional information. 9.3. Operation guidelines To obtain maximum benefit from the system follow these guidelines: Principle of operation The Guardian Manoverboard system comprises one or more crew-worn Alarm Watches and a vessel-mounted Receiver or Direction Finder (DF). Should a crew member fall overboard, the Watch alarm is activated - provided the Watch has been armed. The transmitted signal is detected by the Receiver or DF, so alerting the other members of the crew to the emergency and prompting them to take appropriate action. Key points to remember Installation The system operates on line of sight. It is therefore best to mount the Receiver at the stern of the vessel, as high as possible. The alternative is to use a remote antenna, as described in the User Manual, and to mount this high on the stern. Wearing the Alarm Watch The Watch should be set to automatic alarm mode (i.e. it must be armed), to ensure that there is no delay in activating the alarm. Ideally the Watch should be in contact with skin, not worn over clothing. When an emergency occurs It is vital to mark the point where the alarm sounds, as it takes time to turn the vessel and the exact position can easily be lost during this manoeuvre. A marker can be thrown into the water, or if available the GPS position can be recorded. The Receiver is fitted with contacts to do this automatically in conjunction with a suitable GPS instrument. The casualty should hold the Watch as high as possible; if tired, the wrist with the Watch should be rested on the life preserver and not allowed to hang in the water. Once an emergency has occurred, it is advisable to turn off the squelch so that even a weak signal is detected (see the User Manual for how to do this). Summary

• Operates by line of sight • Watch must be armed for automatic operation • Wear Watch against skin if possible • If necessary, use remote antenna to get sufficient height • Hold Watch high • Mark vessel position immediately when alarm sounds • Turn off Receiver squelch in an emergency • Signal Strength Indicator only provides distance indication at close ranges • Test the system for correct operation before sailing • Ensure all crew members understand how to use the system • If in doubt, seek expert advice on Receiver siting and use



9.4. Controls

1) ON/OFF switch. The green LED will flash when switched on. 2) Fault LED - When the unit is in operation it continuously performs a self-test. If a fault is detected

the LED will illuminate indicating that the unit must be repaired by an authorised Orolia Ltd Service Centre.

3) Mode Press to select: Standard In this mode the Emergency Receiver works as a normal receiver. Note that the alarm does NOT operate in this mode; all detection of alarm signals must be by ear. EPIRB/PLB/ELT Code In this mode the alarm is triggered only if a coded (i.e. a swept-frequency signal from a EPIRB/PLB/ELT) transmission is received; there is a delay of approx 5 seconds to allow for signal processing. NOTE: the alarm is NOT triggered if the sweep is upwards (see Appendix B for an illustration of sweeps). Auxiliary (not used)

4) Freq. Press to select: Emergency Frequency (121.500 MHz) All EPIRB/PLB/ELT emergency transmitters transmit on this frequency, thus this setting is the normal mode of operation. Offset frequency (121.65 MHz) This frequency is used only for training purposes.

5) Squ. Press to turn squelch on and off. 6) Alarm reset silences the alarm and resets the alarm relay. Provided that no further alarm signals

are being received, this reset is cancelled after 60 seconds to ensure that future alarms are not ignored.

1

3

4

5

9

2

7

8



7) Level indicator displays the strength of the received signal. The closer to the transmitter, the greater the number of illuminated LEDs.

(8) Internal speaker (9) Receiving antenna with BNC connector

9.5. Settings The MOB Emergency receiver should be switched on at all times when crew members are aboard the vessel. If a listening watch is kept, then the most sensitive settings are: Standard mode, Emergency frequency, Squelch OFF. 9.6. Operation The receiver must be switched on whenever any crew member is aboard the vessel to maintain a listening watch on the 121.5 MHz alarm frequency. Note that both the squelch control and the Code monitoring mode reduce the receiver sensitivity; the most sensitive detection of signals is by listening for the sound of a sweep. If a sweep is heard or the alarm sounds, immediately record the position of the vessel. This can be done by noting the GPS position, or by throwing overboard a marker, or in some cases by pressing the Man Overboard button on the radar. When the receiver is connected to certain models of GPS systems, closure of the relay contacts when an alarm is detected causes the GPS to store the vessel’s position as a waypoint. Thereafter the GPS displays current range and bearing to this waypoint, so enabling it - and hence the position of the man overboard - to be located. The vessel is then navigated back to that position, and the search for the transmitter started from that locality. It is also possible to connect the relay to disable the engine (as may be applicable to solo sailors), or to provide a remote alarm, etc. Refer to Appendix A. The receiver does not provide any direction information; the Level Indicator represents the strength of the received signal, and hence the distance to the transmitter, by lighting one or more LEDs - the closer to the transmitter the receiver comes, the stronger the signal and so more LEDs become illuminated. The alarm may be cancelled by pressing the Alarm Reset button; as long as the signal is being received, the alarm will not sound again. When the signal ceases, the alarm system resets after 1 minute and is then ready to detect further signals. 9.7. Squelch The receiver has an adjustable squelch level. Adjustment involves disassembly of the receiver and operation in this condition, and so must be performed in as dry an environment as possible. Remove the screw covers at the bottom of the receiver (the end opposite the BNC connector), then remove the screws. Detach the bottom cover, taking care not to stress the wiring. This exposes the squelch level adjustment potentiometer. To adjust the squelch level, ensure that the receiver is operating in Standard mode and that Squelch is on. Rotate the potentiometer anticlockwise (5 to increase the sensitivity of the squelch. When re-assembling the receiver, ensure that the sealing gasket is seated correctly before tightening the screws.

Bottom of receiver showing screw locations Receiver open showing squelch level potentiometer



9.8. Specification

Dimensions: 85 x 115 x 35 mm (without antenna) Weight: 350 g Temperature range: -20° - +60° C Protective system: IP 65 (dustproof and splash proof) Sensitivity: <0.5 μV at antenna input Receiving frequency: 121.500 MHz (channel 1 / ELT frequency) 121.650 MHz (channel 2 /test frequency) Sweep detection: audible AM-modulated downward sweep; LF-range within 300 Hz - 1600 Hz, LF-range 700 Hz minimum, time of repetition: 250 ms - 500 ins, deltaLF/25ms:-l0Hz - 250 Hz External speaker: max. 8 Vpp (speaker > 8 Ohm) Relay contacts (N/O): isolated, capacity 0.5 A / 10 W max Current Drain: Standby: 80 mA

with alarm + ext. speaker (8 ohm): 400 mA Operating voltage: 12 - 24 V DC (±20%)

9.9. Connecting cable (length approx 0.7 m) Red +supply (12 - 24 V DC) Black Ground Orange External speaker Brown External speaker Green Relay contact Yellow Relay contact 9.10. Glossary

BNC Bayonet ‘N’ Connector ELT Emergency Location Transmitter EPIRB Emergency Position Indicating Radio Beacon GPS Global Positioning System LED Light Emitting Diode

MHz Megahertz MOB Man Over Board PLB Personal Location Beacon

9.11. Accessories Non-adjustable Mounting Bracket 88-128 9.12. Spares Repair policy is to replace the entire Receiver, as the equipment is a sealed module.



Appendix A - Alarm contact connections These circuits are suggested as possible uses of the relay contacts in the Receiver. The circuits are intended to be indicative of the uses; exact details must depend on the particular equipment in use. It is recommended that all installations are checked by a competent advisor. The contacts fitted in the Receiver are capable of switching 0.5 A and 10 W; some applications may require a buffer relay, as shown.



10. DIRECTION FINDER

10.1. Applicability This section applies to the MOB Direction Finder, otherwise known as the RT-202 Crewfinder. 10.2. Function The MOB Direction Finder is a precision instrument for indicating the bearing of a transmitter operation on the 121.5 MHz international emergency frequency, The instrument also operates on 121.65 MHz, a frequency used for training. It is envisaged that service agents will be asked to service and adjust these equipments. Accordingly, the user manual is reproduced here, together with additional information.



10.3. Specification Electrical

Sensing method Doppler principle Accuracy +5° Internal resolution 1° Sensitivity < 2uV/m Operating frequencies 121.500MHz and 121.650MHz Modulation A3E, F3A, A2X Polarisation Vertical Beacon identifier Audio sweep, 300-1600Hz, 250-500ms repetition Operating voltage 12V DC +100%, -10% Current consumption 350mA (no external speaker)

Remote interface (pinouts)

Serial RS232 (2–in, 3–out) 1200baud, odd parity, 7 data 1 stop bits Audio output (8) 5Vp-p into 8ohms, approx 0.5W Alarm output (9) Open collector switch to GND, Imax 100mA External switch (4) Instrument switches on at Vin>2.0V Other pins (5,6,7) GND

Mechanical

Operating temperature -20°C to +60°C Storage temperature -50°C to +70°C

Weights Display 600g Antenna 1400g

Dimensions Display 120 (l) x 100 (w) x 55 (d) mm Antenna 260mm diameter 600mm height

Environment IP67 10.4. Direction Finder components As supplied, the Direction Finder is comprised by the following:

i 1 Display unit i 1 Antenna head i 1 Mast fitting i 1 Reducer 50 to 40 mm i 8 Antenna rods i 1 Antenna cable 10 m with connectors i 1 In-line fuseholder and 1A fuse i 4 Display mounting rods M4 stainless i 4 Washers M4 stainless i 4 Nuts M4 stainless i 1 Drilling template i 1 Test record i 1 User manual



10.5. Display unit Front view

1 Frequency error warning 10 Loudspeaker mute 2 Received signal 11 Test frequency switch 3 Signal level 12 Main ON/OFF switch 4 Battery voltage test 13 Signal bearing display 5 Squelch display/reduce 14 ELT identity indicator 6 Squelch display/increase 15 Loudspeaker off warning 7 Repeat direction 16 Test frequency warning 8 Clear memory 17 Power ON indicator 9 ELT mode switch

Rear view

Key 1 Antenna connection 2 External connections 3 Power supply 4 Fixing socket

1

2

3

4

5 6 7 8 9

10

11

12

13 14 15 16 17

1 2

3

4



10.6. Installation Display The display unit should be mounted on a flat smooth surface. Rear access is required to fit the connections and mounting hardware. The front of the display is sealed and is waterproof (IP67). The rear of the unit must be protected from water to maintain the effectiveness of the equipment. A cutting template is supplied with the equipment; a full-sized copy is reproduced in this manual. Take care when cutting that the area behind the mounting panel is clear of wires and other vulnerable elements. To fit the display unit, first screw the threaded mounting rods into the mounting sockets on the rear of the display. A screwdriver slot is provided in each rod to enable it to be tightened. If the display is liable to vibration, the rods should be secured using a screwlocking compound (e.g. Loctite). Do not over-tighten the rods. It is advisable to fit the connectors at this stage, and to pass the power cable into the panel slot. Apply a thin film of sealing compound to the rear outer edge of the display so that it makes a good seal when seated. Fit the display to the panel, taking care not to trap any cables. Fit washers and nuts to the mounting rods, using threadlocking compound if necessary, and tighten to pull the display firmly against the mounting panel. The power supply should be between 12V and 24V DC. The red conductor is the positive supply. The power supply should be fused at 1A using the fuseholder supplied. If the supply cable is extended, the minimal conductor cross-section is 0.75mm2. The equipment is supplied with 10m of antenna connecting cable. If the antenna cable is constructed, the following applies: Display end connector is 9-pin Sub-D plug, antenna end is 9-pole Sub-D socket. Cable size is 0.23mm2 minimum (AWG 24), 9 way + overall screen. Connection is direct pin-to-pin i.e. pin 1 to pin 1, pin 2 to pin 2, etc. Pin 5 is power, cable shield is ground. Cable shield must be connected to connector shield at both ends. If a screened 10-conductor cable is used, then two wires each end should be connected to pin 5. Maximum cable length is approx 50m. Antenna For optimum performance it is recommended to mount the antenna as high as possible where it has an unobstructed view. The preferred position is at the masthead, clear of all reflective and obstructive objects. On some yachts where this is not practicable, the antenna is usually mounted on the stern. In such cases, the antenna must be at least 2m above the deck level. The antenna is designed to be mounted on a mast tube of OD 50mm (or 40mm using the supplied adapter). The mast tube preferably should be synthetic. Other mast tube diameters may be accommodated using special adapters. Do not mount the antenna rods at this stage. Begin by sliding the clamp nut onto the mast tube with the thread uppermost. Glue the tube flange to the top of the mast tube; use a glue suitable for bonding the mast material to PVC. Pull the antenna cable through the mast so that the female connector is free. If the cable length exceeds 10m, provide a strain relief for the cable at the masthead. Connect the antenna cable to the antenna head and tighten the securing screws. Fix the antenna to the mast flange, taking care that the O-ring locates in the groove. Tighten the nut slightly.



When the antenna is fitted to a yacht it is important that the foot end of the mast is sealed, as otherwise if the vessel capsizes the mast may fill with water making righting of the vessel difficult. Assemble the antenna rods by pushing each rod into the socket so that the ring is seated, then tighten the nut by hand. The nuts should be finally tightened using a suitable spanner; do not exceed a torque of 3 Nm. Align the antenna as discussed on the next page and finally tighten the nut completely. It is recommended that a small dab of sealant or cement is used to prevent the nut loosening. Aligning the antenna The antenna head has an arrow on the top surface. This should point exactly forward i.e. along the longitudinal axis of the vessel. The orientation of the antenna head should be checked by practical experiment. The area used for testing should be as clear of obstructions and reflecting objects as possible – a harbour or marina is not a suitable area. The ideal method is to use the Direction finder set to the test frequency together with a test transmitter mounted in a small dinghy, as this will eliminate the possibility of false alarms being generated. The transmitter should be at least 50m from the antenna. Start the test with the transmitter positioned exactly ahead of the vessel. Note the bearing error, which should be 0°. Now take the transmitter slowly around the vessel in a circular path, noting the errors. The transmitter motion must be sufficiently slow that the lag in the bearing display is negligible – a change in bearing of 10° every 15 - 20 seconds is ideal. The intention is to reduce the change in error with bearing to as little as possible. A constant error is not a problem, as this can be reduced to zero using the Display Offset function – see later for instructions. Consequently, it is perfectly permissible to mis-align the receiver head if this improves the constancy of the error. 10.7. Indicators On/OFF (17) NOTE: The On/OFF switch can be over-ridden by operating the display remotely (i.e. by applying a control voltage to pin 4 of the interface connector). When the display is switched on it performs a self-test function. During this, the 36 direction display LEDs light in sequence while the 4 signal level LEDs flash and all other indicator LEDs are lit steadily. Next, the offset value flashes for 1 second (see later for a description of offset) while the major axes LEDs light dimly. When the self-test is complete the green On LED is lit to show that the display is ready for operation. Direction display (13) The bearing of the signal relative to the antenna is shown on a circle of 36 LEDs; a signal due ahead is shown by the 0° LED being lit (assuming that the antenna is correctly aligned with the vessel); a signal from another direction is shown by the appropriate LED, with a resolution of 10°. Signal level (3) The strength of the received signal is shown by a line of 4 LEDs – the more LEDs light, the stronger the signal. Note that movement of the vessel e.g. in heavy seas will cause the signal strength to fluctuate. Signal detect (2) The signal detect LED lights whenever a signal is received, whether or not the Direction Finder can resolve the bearing of the signal.



Frequency error (1) The frequency error LED indicates that the transmitter frequency deviation exceeds 5kHz. Such an error can cause the indicated bearing to be the reciprocal of the correct bearing (i.e. 180° error) and so cause the search to head in the wrong direction. For this reason, the bearing display is extinguished when this error occurs. Test frequency warning indicator (16) This indicator lights when the Direction Finder is set to receive transmissions on the test frequency of 121.650MHz. WARNING The test frequency is only for training purposes. If the Direction Finder is switched to the test frequency, NO DISTRESS BEACON TRANSMISSIONS CAN BE RECEIVED. Loudspeaker off warning indicator (15) This indicator lights when all warning devices (internal loudspeaker, external loudspeaker, external alarm output) have been disabled. ELT only indicator (14) This indicator lights when the display is set to respond only to signals which originate from ELT-type transmitters (i.e. a swept audio tone). 10.8. Interface Serial The Direction Finder has a bidirectional RS-232C serial data interface. Output data are transmitted continuously as ASCII data strings which can be read on any suitable terminal, PC, Organiser, etc. WARNING: Do not use a standard communication cable when connecting to the Direction Finder; such cables may cause short circuits, as many pins normally used for serial communication are reserved for other functions. Output data format Each message starts with an identifying letter identifying the type of data, followed by three digits and terminating in CR LF (ASCII characters 0D and 0A hexadecimal).

Header

Content Meaning

S 0xx 2xx 1xx

Status: no received signal signal but in error (excess frequency deviation) acceptable signal

P xxx Received signal level (as percentage) V xxx Supply voltage

e.g. 132 = 13.2V N xxx Audio frequency as 100ms average

e.g. 124 = 1240Hz A xxx Average bearing in degrees L Xxx Instantaneous bearing value in degrees

Input data format Each message is the ASCII data string terminating in CR LF as above.

Message Meaning SQUELCH[xx] Set squelch level in the range 00 –

70 (00 = most sensitive)

FREQUENCY_NORM FREQUENCY_TEST

Duplicates function of Freq button

VOLUME_ON VOLUME_OFF

Duplicates function of VOL button

ELTIDENT_ON ELTIDENT_OFF

Duplicates function of IDE button



Interface – external devices External speaker (pin 8) This output drives an 8 ohm external speaker connected between it and ground. The speaker duplicates the audio signals on the internal speaker. Alarm (pin 9) This output is an open collector switch to ground. The alarm state is ON. Remote ON/OFF (pin 4) This input activates the Direction Finder when a voltage between 2V and 24V is applied. Ground (pins 5,6,7) Any of these pins may be used as a ground return. 10.9. Operation of the Direction Finder The Direction Finder uses an averaging memory so that the display gives a steady indication under conditions when the signal strength and/or direction is fluctuating. However, there are times when it is desirable to override the averaging as this causes the display to lag the actual signal (by about 3 seconds), which can cause problems if the vessel is turning rapidly. Clear Memory control (key 8) Pushing this button clears the averaging memory; the display is updated to show the instantaneous bearing to the transmitter without any lag. Naturally, after the button is released the averaging process starts again, so the lag will reappear after a few seconds. If the signal is particularly weak, there may be a delay before the display reappears. Whilst the Clear button is held depressed, the display shows the instantaneous bearing value which is updated 100 times per second. This results in several lamps lighting in the bearing display showing the spread in values. This spread is a good indication of the quality of the signal – the larger the spread the worse is the received signal. (The averaging process usually allows signals with a spread of around 45° to be resolved satisfactorily.) Repeat Direction control (key 7) Pushing this button displays the last determined bearing as a blinking LED. This function can be used to provide an approximate bearing if the signal fades to the point where the Direction Finder cannot determine the bearing, as the bearing display will otherwise be blanked. Care must be taken if the vessel is changing course, as the repeated bearing is relative to the vessel’s head at the time when that bearing was determined. Battery Voltage test (key 4) Pressing this button displays the power supply voltage on the bearing display LEDs. The minimum voltage value is displayed at 0°; the maximum voltage value is displayed at 350°, as shown on the diagram. The display adjusts automatically to the nominal voltage of 12V or 24V.

Indication of power supply voltage



Loudspeaker mute (key 10) When the Direction Finder detects a suitable distress signal the alarm function is activated. The internal (and, if fitted the external) loudspeaker reproduce the audio output of the transmitter, and the alarm output is activated. Pushing this button cancels the alarm function for as long as the distress signal is being received. 60 seconds after the signal disappears (for whatever reason – transmitter switched off, lack of signal, etc) the alarm function is re-armed. This feature ensures that the alarm cannot be inhibited permanently. ELT identity switch (key 9) When this mode is disabled the alarm is activated by any received signal at the correct frequency. This can cause many false alarms, particularly near harbours. When the mode is enabled the alarm is triggered only if a coded (i.e. a swept-frequency) EPIRB/PLB/ELT transmission is received. Test frequency switch (key 11) This switch changes the receiver to operate on the test frequency of 121.650MHz. WARNING The test frequency is only for training purposes. If the Direction Finder is switched to the test frequency, NO DISTRESS BEACON TRANSMISSIONS CAN BE RECEIVED. Squelch adjustment (keys 5 & 6) These keys when pressed first display the squelch level as an arc of LEDs on the bearing display. Holding the key down then causes the squelch level to increase or decrease as appropriate. Increasing the squelch level makes the receiver less sensitive, and so tends to suppress interfering signals and noise. The correct level is best adjusted by decreasing the level until the noise becomes audible, then increasing the level carefully until the first point at which the noise is suppressed. The level may need adjustment from time to time, depending on the conditions. 10.10. Display Offset The Direction Finder allows the indicated bearing of the signal to be adjusted relative to the antenna head. If there is a constant error in the bearing display, regardless of the actual bearing indicated, then changing the offset can compensate for this error. The offset adjustment procedure is designed to be a sequence of commands which would not be performed in normal use of the Direction Finder. The offset is shown as the bearing at which a nominal 0° signal is displayed. Offset is in increments of 5° (i.e. if the value is 15°, both the 10° and 20° LEDs flash). Setting the Offset

Switch off the Direction Finder Switch on the Direction Finder While the self-test routine is displaying the bearing display LEDs in sequence, push and hold the Clear and Speaker Off buttons at the same time. Hold until a single LED is flashing rapidly and the major axes LEDs light dimly. Release the buttons Push the Clear button to increase the offset value in 5° steps; push the Speaker Off button to decrease the value similarly. Store the offset value by pressing the Ident button; this causes the display to extinguish, then to flash the new offset value, then to revert to the normal mode of operation.

If whilst in this adjustment mode no button is pressed for 10 seconds, the original offset value will be retained and the instrument will revert to normal operation.



10.11. Display mounting template

10.12. Spares Repair policy is to replace the entire display or antenna. A limited range of mechanical spares may be available – contact Orolia Ltd for assistance.



11. GUARDIAN WATCH It is considered that service agents will be required to provide service and backup for this product. As the instruction book is small and likely to be mislaid, the full instructions for using this watch are included here. 11.1. Introduction The Guardian MOB Beacon Watch is a full function alarm chronograph which incorporates an emergency distress transmitter. The transmitter may be activated automatically if the Watch is immersed in water; it may also be activated manually. This product is designed to be worn in conditions where the user is at risk of falling into water and where it may be difficult to locate the person in the water visually. The beacon is used in conjunction with a receiver to generate an alarm; a direction finder is available to help locate the person in the water. Man Overboard Operation Once armed, the beacon will activate automatically when immersed in sea water, and will continue to transmit until disabled. Arming and disabling are detailed in the Features section. In fresh water the beacon must be activated manually. The beacon cannot transmit effectively when underwater, and needs to be as high as possible for best signal range. Ideally, the user should hold up the arm wearing the watch, but this is impractical for long periods. It is recommended that the arm is rested on top of the lifejacket. Battery Life The battery is designed to power this product for a period of 1 year. When the battery is running low the LED flashes and the sounder beeps four times, repeating every minute. This warning normally indicates that the battery has reached the minimum level at which performance can be guaranteed; any further deterioration may jeopardise the performance of the beacon in an emergency. Refer to Page 15 for information on testing the beacon to verify the alarm. Refer to the Service section for information on replacing the battery. Transmitter Control The transmitter can be set into one of two modes: Off / Transmitting (Permanently transmitting on full power). The activation system can be triggered by one of two methods: Manually / Automatically (by immersion in water). 11.2. Emergency operation ARMING & CONFIRM Button Control Status Check To check the armed status of the beacon, press and hold the ARMING button only. ARMED Continuously repeating 'beep-beep' with LED flashes DISARMED A single beep-beep with an accompanying LED flash

ARMING

LED indicator

CONFIRM



ARM (for automatic activation by immersion in water) To set the Watch in ARMED mode:

Step 1: Press the CONFIRM button 3 times: A single beep and LED flash confirms this step. Step 2: Press the ARMING button once: The acknowledgement is a double beep and LED flash. Once armed the LED will flash once every minute or so to indicate that it is in ARM mode.

DISARM To DISARM the Watch:

Step 1: Press the CONFIRM button 6 times: A single beep and LED flash confirm this step. Step 2: Press the ARMING button once: The acknowledgement is a double beep and LED flash.

Water Sensor The housing has 2 stainless steel sensors that are exposed on the outside of the main housing. For activation, the beacon must be submerged in water for at least 4 seconds. The Water Activation Sensor functions only when the beacon is in the ARMED mode. NOTE: The beacon may activate automatically in extremely damp or wet conditions. If this occurs, use the beacon in Manual Transmit mode. Transmit (Manually) To start transmitting manually, press and hold both the ARMING and CONFIRM buttons for 3 seconds. The acknowledgement is a single beep. The LED flashes during the period of transmission. To stop transmitting the Disable Transmitting sequence must be performed. Disable Transmitting To stop transmitting manually, press and hold both the ARMING and CONFIRM buttons for 6 seconds. The acknowledgement is a single beep and LED flash. Test Function To test the transmitter function of the beacon, press and hold the CONFIRM button. After 3 seconds there is a single beep and a single LED flash to confirm the test mode, followed by transmission at low power. The internal sounder buzzes to indicate that the unit is transmitting. Once the CONFIRM button is released, the transmission ceases. 11.3. Watch Time Functions The time functions use 4 external push buttons (Start, Reset, Mode and Light) for setting and adjustment. The following features are included:

Hour, Minute, Seconds and Day of the Week Month and Date Chronograph 1/100 Second with Lap/Split Control Maximum chronograph count: 23 Hours 59 Minutes 59 Seconds Alarm Hourly Chime 12/24 Hour display at user's option

Normal Readout

Pressing and holding START displays Month, Date and Day of Week Pressing and holding RESET displays Alarm Time Pressing MODE is reserved for changing functions, as described later Pressing LIGHT once turns on the backlight for 3 seconds

Alarm operation When the alarm sounds, press RESET to silence it. Alternatively, press START to silence the alarm for 5 minutes (Snooze function).



Setting Sequence Normal Time Setting

Press Mode 3 times to enter normal time setting mode. TU flag will flash. Seconds will start flashing, press Start to set seconds to zero. Press Reset once: Minutes flashing, press Start to advance. Press Reset once: Hour flashing, press Start to advance (A is AM, P is PM and H is 24 hour format). Press Reset once: Date flashing, press Start to advance. Press Reset once: Month flashing, press Start to advance. Press Start once: Day of Week flashing, press Start to advance. Press Mode once: Setting completed, return to normal time readout.

Alarm Time Setting

Press Mode twice. MO flag will flash. Alarm TIme Hour flashing, press Start to advance. Press Reset once, Alarm Time Min flashing, press Start to advance. Press Mode once, setting Is completed, return to normal time readout.

Arm the Alarm by pressing Start & Reset simultaneously; ALM flag will appear. Disarm the Alarm by pressing Start & Reset simultaneously; ALM flag will disappear. Hourly Chime

Chime is activated by pressing and holding Reset, then pressing Mode once; the SU through SA flags appear. Deactivate Chime by pressing and holding Reset then pressing Mode once; the SU through SA flags disappear.

Chronograph

Press Mode once to enter Chronograph mode; the SU, FR, SA flags flash. Pressing the Start button starts and stops the time display; the time accumulates on successive starts. Reset sets the timer to 0:00:00. Note that the colon sign flashes whenever timing is running. Whilst timing is running, pressing Reset puts the watch into Lap Time mode; the SU, TH, SA flags flash. This freezes the display whilst the timing continues in the background. Pressing Reset again updates the display; pressing Reset yet again freezes the display, and so on. The time is reset to 0:00:00 by pressing Start while the display is counting, and then pressing Reset. To return to normal timekeeping, press Mode once.

11.4. Service Battery change It is not recommended to attempt to replace the product battery, as this is a task for a skilled specialist. It is advisable to return the product to Orolia Ltd, or to take it to a Orolia Ltd Service Agent. Safety The battery contains Lithium. Do not incinerate, puncture or recharge this type of battery. Dispose of it safely in accordance with local regulations. 11.5. Spares Strap Replacement Kit 88-126



11.6. Training Watch The Training Watch is identical to the Guardian MOB Beacon Watch in operation, except that it transmits on 121.65MHz. As a consequence its signal cannot be received on normal distress alarm receivers, thus training exercises may be conducted without creating false alarms. The training watch is clearly identified by its strap markings. NEVER WEAR THE TRAINING WATCH EXCEPT FOR TRAINING EXERCISES. The MOB Emergency Receiver has a special listening mode designed for use in training exercises. 11.7. Battery reset Under certain conditions, typically when the beacon has activated for short periods, the low battery alarm may sound although the battery does not need to be replaced. If this is suspected, the battery alarm function should be reset by:

1. Press and hold the CONFIRM button 2. When the Low Power test tone sounds, press the ARMING button once 3. Release buttons. The unit will acknowledge with 5 beeps. 4. Immediately press the CONFIRM button twice. The unit will acknowledge with a LED

flash. 5. Immediately press the ARMING button once. The unit will acknowledge with 4

beeps. 6. Confirm that the low battery alarm has been reset by monitoring the Beacon for 2

minutes. If the alarm does not sound, the Beacon may be used as normal. If the low battery alarm sounds at this time or subsequently, a new battery must be fitted.

Orolia Ltd Silver Point Airport Service Road Portsmouth PO3 5PB United Kingdom Telephone: +44 (0)23 9262 3900 Fax: +44 (0)23 9262 3998 Email: [email protected] Website: www.mcmurdomarine.com An Orolia Group Business

99-005N Issue 5

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