Marine Electronics Forum - Garmin GSD20 or 21
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03-24-2012, 03:01 PM
I purchased a boat that has a Garmin 2006C but was told I need a GSD 20 to be able to get depth contours. Is this accurate info? and if so I am now looking to buy one if someone has one they would like sell.
03-24-2012, 05:19 PM
Since Garmin just introduced the new GSD 24 I'd bet you'd have no problem buying someones GSD 22.
03-24-2012, 05:23 PM
Verify compatibility. Lot o gsd22 on here.
03-24-2012, 05:28 PM
Correct, the GSD20 was what these units used.
Here is the Manual for the 2006C
03-25-2012, 05:12 AM
I have a 20 if youre interested.
03-25-2012, 08:07 AM
03-25-2012, 03:17 PM
07-06-2012, 11:30 AM
You may have bought one already but if not, I have an unused one in original box, if interested.