Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 06-07-2016, 13:13   #1
Registered User

Join Date: Mar 2014
Location: Bristol, UK
Boat: Colvic Countess 37
Posts: 8
GPS for my VHF Radio

I have a A65 Raymarine chart plotter, it's old but works fine, it has the GPS antenna linked directly to it, providing position etc just fine, but I want to run the position to my DSC silva S15 radio which has a GPS antenna port. I can't figure out what I need, Is there a splitter cable, or a cable that leaves the chartplotter that goes to the radio sending the GPS signal. I can't figure it out what I need, surely I do not need to by a new GPS antenna to go to the VHF Radio, 1 antenna must be able to send position to both the radio and the chart plotter.

Thanks for your help.

jono63812 is offline   Reply With Quote
Old 06-07-2016, 16:25   #2
Registered User

Join Date: Jan 2012
Location: Full time cruisers
Boat: Krogen 42
Posts: 189
Re: GPS for my VHF Radio

Since you say it is old is the gps active or passive?

Sent from my iPhone using Cruisers Sailing Forum

meridian28 is offline   Reply With Quote
Old 06-07-2016, 17:09   #3

Join Date: Feb 2013
Location: Boat is on the Rio Dulce
Boat: Seafarer36c
Posts: 3,584
Re: GPS for my VHF Radio

It's probably a NEMA 0183 signal so just split the 2 wires There is usually enough power to supply 3 devices.
Guy is offline   Reply With Quote
Old 06-07-2016, 18:54   #4
Registered User

Join Date: Jan 2010
Location: Ma
Boat: Sabre 28
Posts: 184
Re: GPS for my VHF Radio

It does not look like your VHF has a GPS receiver in it. So splitting the antenna would not work. The VHF does have NMEA input though and your A65 has NMEA output so you can easily do what you want.

Page 46 of the Silva manual shows the NMEA connection.

The red wire there (GPS +) is the NMEA input on your VHF.

Your A65 has a NMEA connector on the back. See page 18

Connect the NMEA VE+ OUTPUT on the A65 (pin 3, yellow) to the NMEA INPUT on your radio. You might need to connect the NMEA Grounds on both devices together but it may work without doing that. Just be sure in the A65 you have it set to output NMEA sentences RMA, GGA and GLL if available. You can turn everything else off as the Silva only knows those three sentences.

Shawn67 is offline   Reply With Quote
Old 06-07-2016, 18:54   #5
Registered User
clownfishsydney's Avatar

Join Date: Mar 2014
Location: Sydney, Australia
Boat: Lightwave 38' Catamaran
Posts: 231
Re: GPS for my VHF Radio

Page 18 of the installation manual has details of in and out NMEA for the A65. Yellow is +ve and brown is -ve. All you need to do is wire these to the NMEA in of the radio. You could also wire the out of the radio to the in of the A65 and you should be able to plot automatically any position requests you make to other boats.
Michael and Kelly
Catlypso - Web Site
Lightwave 38' cat
clownfishsydney is offline   Reply With Quote
Old 07-07-2016, 08:50   #6
Registered User
S/V Alchemy's Avatar

Join Date: May 2008
Location: Toronto
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,227
Re: GPS for my VHF Radio

Much as I admire sailorly frugality, you could just get a new VHF base station that will give you GPS, AIS and other handy functions. I am very happy with my SH GX2200, although the ICOM 604(?) is equally capable.

They've been out for a couple of years and you might find them on sale: The world encompassed: The new VHF is a MMSI affair

I'm running the NMEA outputs to a netbook with OpenCPN on it, by the way. Same results as you want, but the plotter is off the radio, not the other way around.

Can't sleep? Read for fast relief. Can't read? Avoid, because it's just personal reviews of sea books.
S/V Alchemy is offline   Reply With Quote

gps, hf radio, radio, vhf

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
VHF and AIS Radiowave Propagation and VHF and AIS Radio Range ka4wja Marine Electronics 21 13-12-2015 18:20
Can AIS Share VHF Antenna with Existing VHF Radio ? cool2848 Marine Electronics 18 24-04-2013 08:56
Ray 55 VHF radio indicates "NO GPS" Pacific Electrical: Batteries, Generators & Solar 2 03-04-2011 19:23
Cheap GPS Receiver for Icom VHF Radio Joe500 Marine Electronics 10 02-11-2009 12:53
GPS communication to VHF radio mpoulter Marine Electronics 26 04-03-2009 07:54

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:55.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.