VHF DSC not talking to GPS - help please

I second Elton's advice to draw the connections out carefully....

Also (as asked above) are you powering the GPS72 from the boat battery or its internal battery?

Just double (triple?) checking that you have the 'Interface' set to 'NMEA'.

Does your GPS72 allow you to select different NMEA sentences? (Page 47 in the manual linked to above suggests that it does, but I don't recall this on the GPS72 I used to own).

Assuming it does, what are your current settings? I would clear all of the options in the first instance.

Just my 0.02p

Andy
 
Simillar advice to one earlier, Check in the navman menu that it is sending data in the correct laguage (should me NMEA i think). Garmin units will also connect to a computer to download maps and waypoints and this uses a different language.
 
jeodana said:
Simillar advice to one earlier, Check in the navman menu that it is sending data in the correct laguage (should me NMEA i think). Garmin units will also connect to a computer to download maps and waypoints and this uses a different language.
Click to expand...

Very true.

When on the boat, to talk to my VHF DSC, my Garmin plotter is set to "NMEA 0183 V2.0" and this works correctly. You could try other versions of NMEA. Mine offers NMEA 0180, NMEA 0182, NMEA 0183 V1.5 and NMEA 0183 V2.0

When at home, to upload routes and waypoints from Open CPN I have to set it to "Data Transfer"
 
Further to my earlier reply and your opening posting. You state that the radio was connected to the chartplotter(not the Garmin one presumably) and must have had an MMSI number input to operate the radio/chartplotter linkage then. I assume that it is possible that the previous MMSI input is still resident there in the radio) and your DSC radio will not recognise any new gear added - so maybe the OP needs to clear the MMSI from the old registered unit and putting in the new MMSI.
So in effect nothing to do with incorrect wiring at all.
I returned the manuals to the boat today ,so cannot assist with the actual instruction how to clear old MMSI's if there is one there.

Just my 2 pennorth!

ianat182
 
Thanks for all the help with this problem last year. I eventually gave it up as a lost cause and got on with other more pressing boat problems.

We were sailing last week and after a few ales I decided to have another go at the wiring, concluding after an hour or so's fiddling, that there nust have been a break in the wire somewhere. I started continuity checking, the GPS was fine, the VHF had no wiring diagram so I set about tracing from scratch. In the dark at the back of the shelf by torchlight I noticed a slightly bent pin on the VHF. A quick tweak with some pliers and hooray it all works.:):):):):)

Ross
 
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