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Author Topic:   Adding sonar to a Garmin GPS
JBCornwell posted 02-28-2006 06:47 PM ET (US)   Profile for JBCornwell   Send Email to JBCornwell  
My new-to-me Striper 15 has very little room on the console.

I have a Garmin 276C that navigates my vehicle but is also a fine marine GPS.

I have been shopping for a SMALL sonar to fit on the console with the 276C without much luck.

Garmin has the DSG 20 accessory that can make the 276C double as a sophisticated color sonar. It costs less than a sophisticated color sonar but more than a basic mono sonar unit. It can be mounted anywhere.

Has anyone used a GSD 20? Any other ideas? Suggestions?

Thanks for any input. :)

Red sky at night. . .

AK153 posted 03-01-2006 12:07 AM ET (US)     Profile for AK153  Send Email to AK153     
I have that exact set up on my 15'SS. Very nice and clean installation. Plus, if you decide to upgrade to a larger Garmin GPS it just plugs right in. Downfalls are it is a little harder to wire to the 276C than to other Garmin products. You must call Garmin to get the wiring info or, if you decide to get it you can email me and i will send it. Don't forget about the preprogrammed Blue Chart data cards. They are awesome(my opinion). Best of luck! Mel.

JBCornwell posted 03-01-2006 08:10 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Thanks, Mel. That is good news.

Don't need Bluechart, but I do have the Rec Lakes and Fishing Hotspots CD and extra cards that I can program by downloading from my PC.

Is there software involved in getting the 276C able to use the GSD input? Is that included? What cables, etc. come with the unit?

Which transducer are you using, and would you choose a different one if you had it to do over?

Thanks for your advice and suggestions. :)

Red sky at night. . .

Chuck Tribolet posted 03-01-2006 09:28 AM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Latest 276C manual:
Latest GSD20 manual:

GSD20 manual shows how to hook it up. You'll have to connect
some bare wires.


AK153 posted 03-01-2006 08:51 PM ET (US)     Profile for AK153  Send Email to AK153     
No software is needed. Remember, the 276C is really just a display for the GSD 20. It only comes with one cable with a cannon plug style connector on one end and bare wires on other(like Chuck said). Your 276C comes with a connector that will connect to back of 276C and bare wires on other end. The wiring diagram for hooking the 276C up is NOT in your GSD manual. The problem lies in the fact the 276C can run off a battery or 12 volt power. When the other Garmin units turn on(12 volt only) they send power to the GSD 20 and power it also. The 276C doesn't. The GSD 20 needs a switch so it can be turned on and off or it would be powered all the time. I bought a switch just like the factory running light switch and it looks pretty nice. The transducer is a depth and temperature 50/200kHz 40/10. I felt the speed part was not needed. I am happy with my purchase. Small boats need all the room you can get and having the sonar hidden is nice. Looks clean and professional and at the end of the day it can be removed in about five seconds. No eye candy for would be thieves! Mel.
Chuck Tribolet posted 03-01-2006 11:09 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
AK153, that's in the current version of the GSD 20 manual.

And I'd just wire it all through the Accessory switch.


AK153 posted 03-02-2006 09:50 PM ET (US)     Profile for AK153  Send Email to AK153     
That's a good idea with the accesory switch. Wow, i feel like a knucklehead for not thinking of something that simple!

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