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Old 13-05-2013, 14:42   #1
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Radio/GPS Connection

Does anyone have any experience in connection of a VHS radio with emergency location broadcast capability to an older, JRC Radar/GPS/Plotter? Here in Western Canada we have an ICOM -M504 radio and have registered for an MMSI number with Transport Canada but the JRC radar manual has no reference to this connection. The local agent for JRC has not provided much help since that company has gone out of the recreational boating market.

Ray H
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Old 23-05-2013, 05:48   #2
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Re: Radio/GPS Connection

This connection is typically NMEA 0183.. if the back of your plotter has a connector then wiring it is pretty straightforward... if, on the other hand, the sentencing of the serial string or checksum is incompatible then you are hosed. I connected and older Raymarine RC530 to a new VHF and it went well.
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Old 23-05-2013, 05:50   #3
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Re: Radio/GPS Connection

Greetings and welcome aboard the CF, Ray, and Mystic.
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Old 23-05-2013, 06:58   #4
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Re: Radio/GPS Connection

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Originally Posted by rhebden View Post
Does anyone have any experience in connection of a VHS radio with emergency location broadcast capability to an older, JRC Radar/GPS/Plotter? Here in Western Canada we have an ICOM -M504 radio and have registered for an MMSI number with Transport Canada but the JRC radar manual has no reference to this connection. The local agent for JRC has not provided much help since that company has gone out of the recreational boating market.

Ray H
What are you trying to do? Get position data into your radio from your system?

The Icom 504, if it's like my M604, needs 4800 baud data over NMEA0183. Most networks from the last 15 years or so have an output of such data. Just find the two wires (or place to connect two wires) anywhere on the system which output NMEA0183 data, and connect them to the NMEA0183 input pins on your radio. Those are hollow gold pins to which you solder the wires, then screw down the connector over. That should work, as it did on my previous system with approximately 12 year old Raymarine gear.

If you can't find any NMEA0183 output from your system, which is possible is it is really old, then you can buy a GPS receiver which directly outputs this data. They are not expensive. Just install it and connect it to your radio, the same way -- NMEA0183 outputs connected directly to NMEA0183 inputs on your radio, plus you will need a power supply for the GPS receiver.


Now if, on the other hand, you are trying to get data about DSC alerts from your radio onto your plotter -- that is a horse of an entirely different color. You will need to read your manuals. That is unlikely to work at all on older systems.
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Old 23-05-2013, 17:06   #5
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Re: Radio/GPS Connection

Why, thankee kindly

Ian

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Greetings and welcome aboard the CF, Ray, and Mystic.
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