Thrane and Thrane A S R5 McMurdo R5 Hand Held VHF Radiotelephone User Manual

Thrane & Thrane A/S McMurdo R5 Hand Held VHF Radiotelephone

Manual

R5 GMDSS VHFHandheld RadioUSER MANUAL
0709Emergency procedure• Remove the top-seal of the yellow emergency battery package.• Insert the battery package into the handheld transceiver.• Turn the knob at the top of the radio clockwise. The display lights up showing the last used channel and the battery level.• Select channel 16 (Distress or Safety), press the 16/C key.• Press the PTT and say: — “MAYDAY, MAYDAY, MAYDAY”, — “This is”..... ships name repeated three times — — “MAYDAY” — “This is”..... ships name and call sign, — The ship’s position in latitude and longitude or other reference to a known geographical location, — The nature of distress and assistance wanted, — Any other information which might facilitate the rescue. — “OVER”• Release PTT and listen for answer.
iWarranty limitationIMPORTANT - The radio is a sealed waterproof unit. To create and maintain its waterproof integrity it was assembled in a controlled environment using special equipment. The radio is not a user maintainable unit, and under no circumstances should the unit be opened except by authorized personnel. Unauthorized opening of the unit will invalidate the warranty.DisclaimerThe information and illustrations contained in this publication are to the best of our knowledge correct at the time of going to print We reserve the right to change specifications, equipment, installation and maintenance instructions without notice as part of our policy of continuous product development and improvement. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, electronic or otherwise without permission in writing from Orolia Ltd. No liability can be accepted for any inaccuracies or omissions in the publication, although every care has been taken to make it as complete and accurate as possible. This manual is applicable for McMurdo R5 GMDSS VHF handheld radios manufactured after May 2012.1211
iiIMPORTANTOrolia Ltd warranty registrationCongratulations on purchasing your product. As standard your unit has a one year (12months) warranty from the date of purchase shown or your invoice, however, this can beextended by a further four years by simply registering your unit on-line at:www.mcmurdomarine.comThen follow the REGISTER WARRANTY link at the top of the page.Warranty StatementSubject to the provisions set out below Orolia Ltd warrants that this product will be free of defects inmaterials and workmanship for a period of up to five years (see above) from the date of purchase. OroliaLtd will not be liable to the buyer under the above warranty:-for any defect arising from fair wear and tear, wilful damage, negligence, abnormal working conditions,failure to follow Orolia Ltd’s instructions (whether oral or in writing) including a failure to install properlyand/or to use batteries recommended and/or supplied by Orolia Ltd, misuse or alterations or repair of theproduct by persons other than Orolia Ltd or an Approved Service Agent;for parts, materials or equipment not manufactured by Orolia Ltd in respect of which the buyer shall only beentitled to the benefit of any warranty or guarantee given by the manufacturer to Orolia Ltd;for the battery storage life which is specifically excluded from this warranty;if the total price for the product has not been paid.THE LIMITED WARRANTY STATED ABOVE IS EXCLUSIVE AND IN LIEU OF ANY OTHERWARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTYOF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Orolia Ltd will not be liable forindirect, special, incidental or consequential damages of any kind sustained from any cause. In no eventshall Orolia Ltd be liable for any breach of warranty or other claim in an amount exceeding the purchaseprice of the product. This warranty does not affect any statutory rights of the consumer. In order to be valid,claims must be made under the above warranty in writing as soon as practicable after discovery of thedefect or failure and within the warranty period referred to above. Proof of purchase will be required. Theclaim should be sent together with the product in question to the address set out below or to an ApprovedService Agent. Following a valid warranty claim Orolia Ltd shall be entitled to repair or replace the product(or part) in question free of charge, or at Orolia Ltd’s sole discretion to refund to the buyer the price of theproduct (or a proportional part of the price). Orolia Ltd shall not be liable to a buyer who is not a consumerfor 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 caseof a consumer Orolia Ltd shall only be liable where other loss or damage is foreseeable.Nothing shall limit Orolia Ltd’s liability for death or personal injury caused by its negligence. This warranty isto be interpreted under English law.All enquiries relating to this warranty or Approved Service Agents should be sent to:Orolia Ltd, Silver Point, Airport Service Road, Portsmouth, Hampshire, PO3 5PB, UKTelephone: Int + 44 (0) 23 9262 3900 Fax: Int + 44 (0) 23 9262 3998Web: www.mcmurdomarine.com Email: service.mcmurdo@orolia.com An Orolia Group BusinessWARRANTY STATEMENT1211
iiiEND OF LIFE STATEMENTDisposalThe Waste Electrical and Electronic Equipment (WEEE) Directive aims to minimise any adverse impact of electronic equipment on the environment, both during the product lifetime and when it becomes waste. Within the European Union this legislation is mandated by Directive 2002/96/EC, and there is similar legislation in most other continents. The directive applies to all electronic products such as IT, household appliances, portable electronics etc., and imposes requirements to collect, treat, recover and recycle each product at its end of life. Electronic end-user products must also carry a WEEE label (as below) and recovery and recycling information has to be provided to the recycler.This product contains traces of lithium in the battery pack. In addition it may contain lead and brominated flame retardants (BFRs), both in the housing material and circuit boards. In keeping with the directive, Orolia Ltd strongly recommends that this product and its battery pack be disposed of in a sensible and considerate manner. For example, do not simply discard the product in the domestic waste. Instead take it to a civil recycling facility, or contact Orolia Ltd for advice.This device complies with the GMDSS provisions of part 80 of the FCC rules. EC Declaration of Conformity Hereby Orolia Ltd declares that this product is in compliance with the essential requirements and other relevant provisions of the Marine Equipment Directive (MED) – 96/98/EC A copy of the Declaration Of Conformity can be obtained on line from;www.mcmurdomarine.com/documents 1211
ivPrecautionsAvoid water and salt in the I/O connector and keep it clean frequently.Only use original battery packs. Make sure they are clean and dry before attaching the transceiver. Be careful not to damage any gaskets.Only use the original charger for the rechargeable battery.Be very careful when handling the Lithium batteries. With correct use they are safe but any misuse might cause dangerous situations.Never short circuit the battery terminals, never expose the transceiver and the batteries to extreme temperature or fire and never use any kind of violence.Avoid close contact between the antenna and parts of the human body. The top of the antenna must never be closer than 5 cm to the body when transmitting.Do not submerge the transceiver more than 1 m for 30 minutes.Keep the transceiver at least 0.3 m away from the magnetic compass.0709
vTraining informationMcMurdo R5 GMDSS VHF is designed for "occupational use only". It must be operated by licensed personnel only.The R5 complies with the FCC RF exposure limits for "Occupational Use Only". • FCC OET Bulletin 65 Supplement C, evaluating compliance with FCC guidelines for human exposure to radio frequency electromagnetic fields.• American National Standards Institute (C95.1) IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3 kHz to 300 GHz.• American National Standards Institute (C95.3) IEEE recommended practice for the measurement of potentially hazardous electromagnetic fields - RF and microwaves.Correct useFor best performance, hold the radio vertically and 10 cm away from the head when talking into the microphone.Warning! Your VHF radio generates electromagnetic RF (radio frequency) energy when transmitting. To ensure that you are not exposed to excessive amounts of energy and thus to avoid health hazards from excessive exposure to RF energy, all persons must be at least 5 cm away from the antenna when the radio is transmitting.0703
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viiContentsChapter IntroductionYour GMDSS VHF ................................................................ 1Performance .......................................................................2Channels ............................................................................2Chapter OperationControls ..............................................................................3Keys and buttons ................................................................3The display .........................................................................5Using the GMDSS VHF ........................................................6Basic functions ...................................................................6Other functions ...................................................................9Configuring the GMDSS VHF .............................................. 11Entering and using configuration mode ............................. 11Configuration settings .......................................................12Chapter BatteriesBattery types .................................................................... 15The primary battery .......................................................... 15The secondary battery ...................................................... 16Battery level indication ..................................................... 16Removing and inserting the battery pack ...........................17The battery charger .......................................................... 18Installing the charger ....................................................... 19Recharging the secondary battery .................................... 190643
viiiChapter Equipment and accessoriesExternal equipment ...........................................................21Impact on radio operation .................................................21Accessories ...................................................................... 22List of accessories ............................................................. 22Attaching and removing the belt clip ................................ 24Attaching the lanyard .......................................................24Chapter TroubleshootingDisplaying errors ..............................................................25App. Technical specificationsTechnical data R5 GMDSS VHF .......................................... 27General ............................................................................ 27Transmitter .......................................................................28Receiver ...........................................................................28Battery life guidelines ......................................................29Primary battery (non-rechargeable) .................................29Secondary battery (rechargeable) .....................................29Dimensional drawing, transceiver ....................................30Dimensional drawing, chargers .........................................31App. AttentionGoretex Membrane ..........................................................330740
Chapter 11IntroductionYour GMDSS VHFYour portable VHF transceiver, is approved to fulfil the GMDSS requirements for portable VHF radios for Safety at Sea and is waterproof to the IP67 standard.As part of the required safety equipment, the R5 is to be used in an emergency situation. However the best way to guarantee functionality in an emergency situation, is to use the radio in daily communication on board. The unique battery concept makes the radio suited for both daily use and emergency situations. The primary emergency battery is to be stored for emergency situations and a secondary rechargeable battery can be used for daily communication in your new portable VHF transceiver.The radio is designed with a unique man machine interface, an excellent grip even with gloves, and large tactile buttons. The display has red adjustable backlight which makes the display visible even at night. The radio is equipped with a lanyard and a belt clip.0641
Introduction2PerformanceFor best performance of the transceiver keep the following in mind:• Keep clear of metal environment.• Hold the transceiver vertically and 10 cm from lips and push the PTT when transmitting.• In receive mode carry the transceiver vertically with belt clips.• To preserve battery power, adjust squelch to close the loudspeaker when there is no signal.• If you are in a lifeboat keep the antenna as high as possible.ChannelsThis radio operates with the following channels:Notes: • All channels are Simplex.• Tx power is limited to 1 W on channels 75 and 76.070361115687377812166974879131771758810 14 67 72 76
Chapter 23OperationControlsKeys and buttons1. On/off/volume2. Light/Lock3. Push To Talk (PTT)4. Up key5. Down key6. Hi/Lo output power7. Squelch8. Scan9. Priority channel (16)/ Call channel10. Loudspeaker/microphone12345678910
Operation4Key pressesPressing and holding certain keys gives access to additional functions, shown in the table below. Key Short press (1 beep)Long press(2 beeps)Extra long press (3 beeps)Show next available item in the list (up or down).Default: Channel selectionRun through available items, or select tagged channels A () or B ().Run through available items if an A or B channel is taggedActivate Squelch control (Adjust with up/down arrows).Monitor function. Open Squelch completely.1 press: Activate/terminate Dual/Triple watch.2 presses: Activate memory scan. Add/Delete channel from memory scan.Toggle between high and low transmitter power.Select channel 16. Select programmed Call channel.Program Call channel.0703
Operation5The displayThe display holds various fields of information, explained below.1. Current working channel.2. Current channel mode.3. “Lo”: Reduced transmitter power. Full transmitter power is not shown in display.4. Dual watch activated. 5. Current working channel is marked for scanning.6. Keypad is locked.7. Battery level indicator.8. Transmitting (Tx) /Receiving (Rx).9. Accessory is connected.10. Service line for various purposes. In this example the volume level.134567891020643
Operation6Using the GMDSS VHFBasic functionsSwitching the radio on and off•To switch the radio on, turn the knob at the top of the radio clockwise. The display lights up showing the last used channel and the battery level.•To switch the radio off, Turn the knob back counter-clockwise until it clicks.Selecting the working channel• To select channel 16 (Distress or Safety), press the 16/C key.• To select the Call channel, use a long press on 16/C.• To select among all available channels, press  or  on the keypad. For fast selection, press and hold  or . The display shows the currently selected channel.Note Before using the radio, mount the antenna at the top of the radio. The antenna is delivered with the radio. Note Long press on  or  can also be used to select preferred channels. For information on how to program preferred channels, see Configuring the GMDSS VHF on page 11 .0643
Operation7Activating a callTo activate a call to the selected channel, press and hold the PTT button on the side of the radio.The radio transmits as long as the PTT button is pressed. A small Tx sign next to the channel num-ber indicates when the radio is in transmit mode.Adjusting the volume•To increase the volume, turn the on/off knob at the top of the radio clockwise.•To decrease the volume, turn the knob counter-clockwise.The display shows the level of the volume, e.g. “VOL 5”, while it is adjusted. Using Squelch control•To activate Squelch control, press the SQ key.•To set the Squelch level, press  (closing) or  (opening). The display shows the Squelch level while it is adjusted, e.g. “SQ 5”.Adjusting the display backlight•To turn on the backlight, press the Light/Lock button on the side of the radio.•To adjust the backlight level, press  or  within 3 seconds after turning on the light.The display shows the level while it is adjusted, e.g. “DIM MED”.1211
Operation8Using Dual watchTo activate Dual watch, press the SCN key.The display shows “Dual” at the top and “16” at the bottom right. The radio toggles between the selected channel and channel 16. •To terminate Dual watch, press SCN again.Scanning channels•To activate scanning memory, press 2 times SCN within 2 seconds. During scanning, the display shows “SC” in the channel field. The radio toggles between channel 16 and each of the channels marked for scanning.•To terminate scanning, press SCN once.Changing the transmitter powerTo change the transmitter power, press the Hi/Lo key. The display shows “Lo” when power is set to low. Otherwise maximum power is used.Locking the keypad•To lock the keypad, press and hold the Light/Lock button. The display shows a key symbol when the keypad is locked.•To unlock the keypad, press and hold the Light/Lock button again.0740
Operation9Other functionsProgramming the Call channelTo program the Call channel, do as follows:1. Press and hold 16/C until the current Call channel number is flashing.2. Select the channel with  or .3. Press 16/C to confirm.Programming the scanning memoryTo add a channel to the scanning memory, select the channel and then press and hold the SCN key until the display shows MEM at the top.To remove a channel from the scanning memory, select the channel and then press and hold the SCN key until the MEM sign disappears from the display.Alive beepTo enable “ALIVE” function do as follows:1. Select the channel where ALIVE function is desired to be transmitted.2. Press and hold the Hi/Lo until you see “ALIVE ON” on the radio display. It takes approx. a second.3. Now “ALIVE” is transmitted by a "beep" on the working channel, with approx. 4-second intervals.To deactivate “ALIVE” function do as follows:• Press and hold the Hi/Lo pressed until “ALIVE ON” no longer appears on the radio display. It takes approx. a second.0740
Operation10“ALIVE” function is also deactivated when• The channel is changed.• The radio is turned OFF and ON again.• Watch or scanning is enabled.• Squelch is open.Refer to ALIVE on page 131211
Operation11Configuring the GMDSS VHFEntering and using configuration mode•To enter configuration mode, press and hold the Light/Lock button while turning on the radio.The bottom line of the display shows the current menu item/setting.•To exit configuration mode, turn off the radio or press any key except ,  and the Light/Lock button.Using the PTT button or leaving the radio inactive for 10 seconds also causes the radio to exit configuration mode.•To change a setting, press  or .•To confirm the current setting and go to the next menu item, press the Light/Lock button.Note The radio is not operational in configuration mode.0643
Operation12Configuration settingsConfiguration mode is used to program preferred channels and volume of key beep and battery alarm.The following settings are available in configuration mode.BEEP MAX Status click/beep sound on key press, long press (settings/programming saved) and battery alarm. Maximum level.MIN Status click/beep sound on key press, long press (settings/programming saved) and battery alarm. Minimum level.OFF All beeps off.PREFA OFF Remove tag “A” for current working channel.ON Tag current working channel with “A”. If another channel was previously tagged “A”, this is overruled.• The working channel can now be selected with a long press on .PREFB OFF Remove tag “B” for current working channel.ON Tag current working channel with “B”. If another channel was previously tagged “B”, this is overruled.• The working channel can now be selected with a long press on .VER X.XX.XX Software version. Read-only.0703
Operation13ALIVE OFF Factory default state.ON Press  to set “ALIVE” on.ADD NAME A-Z, 0-9 Makes it possible to name the channels.The name must contain a maximum of 9 characters, use only capital letters, digits and spaces.Press Light/Lock to confirm programming.Note: The name appears in the service line on the display.12111211
Operation14 1211
Chapter 315BatteriesBattery types• The yellow primary battery pack contains a non-rechargeable Lithium battery. This battery pack is only to be used in case of emergency.• The black secondary battery pack contains a rechargeable battery. This battery pack is for daily use.The primary batteryBefore using the primary battery, remove the seal on the battery pack.Then do as follows:1. Attach the battery pack to the radio as shown.2. Lock the battery with the safety lock at the bottom.The primary battery is capable of providing sufficient power for 8 hours of operation defined as 10% Tx, 10% Rx and 80% standby.When the primary pack is not in use it must always be placed in the dedicated rear position in the charger cradle, see The battery charger on page 18.Important The yellow primary battery pack is only for emergency use, and is not rechargeable.120709
Batteries16The secondary batteryBattery level indicationThe black secondary battery pack is for daily use of the radio. When the battery level is low, you should recharge the battery.The radio display shows the battery status. When the battery symbol is empty and flashing, the battery should be recharged as soon as possible.0643
Batteries17Removing and inserting the battery packTo remove the battery pack, do as follows:1. Open the safety lock as shown.2. Remove the battery.To insert the battery pack, attach the battery and close the safety lock as shown on the previous page.120740
Batteries18The battery chargerThe chargers has two compartments.Single Charger Kit • A rear compartment only for storing a spare battery. It does not have a charger function. • A front compartment for recharging the battery alone or while attached to the radio.Dual Charger Kit• It is possible to charge a battery in rear compartment simultaneously with the radio/battery in front.Single Charger Accessory OptionSecondary battery (black, rechargeable)Single Charger BaseAC/DC converter, length 150cm(100-240V~/12V DC out)12-24V DC Connection cable,length 150cm1211
Batteries19Installing the chargerMounting the chargerThere are several options for mounting one or more chargers on a table or a wall. For information on dimensions and screw positions, refer to Dimensional drawing, chargers on page 31.When mounting the charger, make sure it is placed in a dry place and away from direct sunlight. The charger is not waterproof.Connecting to powerThe charger can be supplied with DC or AC.DC: Connect the 12-24VDC Connection Cable between the DC supply and the connector on the underside of the charger.AC: Connect the AC/DC adapter to the connector on the underside of the charger. Then connect the AC/DC adapter to the AC outlet.Recharging the secondary batteryTo recharge the secondary battery, place the radio with battery or the battery alone in the front position of the charger cradle.If the radio cannot turn on due to completely discharged battery, then turn off the radio and place it in the charger or charge the battery alone.The light indicators on the charger cradle show the status as follows:• Green light: Power is connected to the charger.• Slow red flash: Charging in progress.Important Do not attempt to recharge the yellow primary battery!0806
Batteries20• Quick red flash (twice per second): Charging error, e.g. battery defect or temperature out of range.• Steady red light: Charging completed. Trickle charge mode.Charging time with emtpy battery: VHF off approx. 4 hours, VHF on: approx. 5 hours.The battery indicator on the radio display indicates if the radio is placed in the charger while radio and charger are both powered.0806
Chapter 421Equipment and accessoriesExternal equipmentThe R5 VHF radio accessory connector can support remote handset or headset connection. Contact the suppler of the accessory device for detailed connection information.When external equipment is connected to the radio, the right side of the display will show a headset.Impact on radio operationThe external equipment can have a built-in PTT button, speaker and microphone. Thus a connection has per default the following impact on the radio operation:• If a speaker or earpiece is built into the detected external equipment, the sound device of the external equipment is used, and the internal radio speaker is disabled.• The external accessory microphone is selected as audio input device, when the external PTT button is pressed. The transceiver microphone is used as audio input device when the transceiver PTT button is pressed.• This behaviour can be changed in the service tool.0740
Equipment and accessories22AccessoriesList of accessoriesThe following accessories are delivered with your radio:Batteries, charger, AC/DC Converter and 12VDC Connection are described inBatteries on page 15. To mount the antenna, simply screw it into the threaded bush at the top of the radio.Use of lanyard is only for hand held operation. Put it around the wrist to prevent dropping the radio.AccessoryPrimary battery non rechargeable, B3502Belt clipAntennaLanyardUser Manual (this manual)0945
Equipment and accessories23Accessories you may buyLeather CaseWarning!The display must always be kept away from the body to reduce the RF explosure when body worn.AccessoryDual Position Charger Kit Leather Case0945
Equipment and accessories24Attaching and removing the belt clipTo attach the belt clip, slide the belt clip upwards into the rails at the back of the radio until it locks.To remove the belt clip, press the projection at the top of the belt clip to release the lock and slide the belt clip downwards out of the rails. Attaching the lanyardDo as follows:1. Take the lanyard through the eye at the top of the radio.2. Put one end of the lanyard through the loop at the other end of the lanyard and pull to tighten.Release lockTop view0740
Chapter 525TroubleshootingDisplaying errorsSome errors result in an error message in the display. These error messages are listed below.Display text Problem Type ActionsErrEMPTY BATThe battery voltage is below a critical level, where further operation would damage the battery.Severe. Radio is non-functional.Change/recharge the battery.ErrHW ERRHardware error. Severe. Radio is non-functional.Service required.ILLEGALContext fails operation. This text will appear on the following occasions:• Multiple watch is selected on channel 16, or in channel regions where it is not allowed. • High power is selected on a channel where it is prohibited.• Transmission on blocked channelsFail operationConsider operation in a different context.0845
Troubleshooting26 0845
Appendix A27Technical specifications Technical data R5 GMDSS VHFGeneralItem SpecificationRX frequency range 155.000 - 163.425 MHzTX frequency range 155.000 - 161.450 MHzModulation 16K0G3EPower supply 7.2 VDC Li batteryCurrent drain at 2 W TX 1.4 ACurrent drain at 1 W TX 0.8 ACurrent drain RX max audio 0.25 AAntenna port 50 ohmPrimary Battery Lithium Iron Disulfide, 3000 mAhSecondary Battery (option) Lithium-Ion, 1800 mAh rechargeableOperating temperature -20°C to +55° CWater ingress protection IP67Frequency stability Better than ±0.7 kHzWeight with emergency battery 340g0740
Technical specifications28TransmitterReceiverItem SpecificationRF output power 2 W /1 WRF output power, Canada 2.5 W ±1 dB / 0.75 W ±1 dBMax deviation ±5 kHzSpurious emission < 0.25 uWAdjacent channel power > 70 dBItem SpecificationSensitivity (20 dB SINAD) -117 dBm typicalIntermodulation Better than 70 dBSpurious response > 70 dBAdjacent channel selectivity > 70 dBAudio output, internal 0.25 W at 10% dist.Audio output, external 0.25 W/8 ohm0740
Technical specifications29Battery life guidelinesPrimary battery (non-rechargeable)The primary non-rechargeable battery pack is capable of providing sufficient power for the specified 8 hours according to regulations.The battery is marked with an expiry date. Replace the battery at or before this date.To ensure a long lifetime keep the battery in the store position in the charger and avoid high temperature and direct sunlight.Secondary battery (rechargeable)During daily use, always keep the battery fully charged and away from hot areas.Keep the battery terminals dry and clean.Never discharge beyond the specifications of the battery.Operation/Standby time depends on usage. Generally, the more the radio is transmitting, the faster it will drain the battery. Also, the “Hi” power setting will drain the battery faster than the “Lo” setting.Approximate figures are:• A battery can be stored for 4 to 6 month at 25°C if charged to 25%.• The battery will normally last for 5 to 9 hours of use on a fully charged battery. Note New batteries should be placed in the charger for minimum 12 hours first time.0709
Technical specifications30Dimensional drawing, transceiver0709
Technical specifications31Dimensional drawing, chargersMounting PossibillitiesDesktop mounting, top view Wall mounting, rear view 0740
Technical specifications32 0703
Appendix B33AttentionGoretex MembraneTo keep the VHF watertight, is it very important that the goretex membrane behind the label under no circumstances must be damaged or removed. 0740
Attention34 0740
Orolia Ltd Silver PointAirport Service RoadPortsmouth PO3 5PBUnited KingdomPhone: +44 (0)23 9262 3900Fax: +44 (0)23 9262 3998Email: service.mcmurdo@orolia.comWebsite: www.mcmurdomarine.com20-150 Issue 1An Orolia Group Business98-124294-MCM-G

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