Question about Garmin Gsd 21 Sounder Blackbox Fishfinder Module
I have a 3210 garmin chartplotter with a gsd 22 sounder module, reads depth fine when moving but depth window flashes on and off when in 30 or so feet of water, whats wrong
I think you need to level the transducer. You have it pointed way out in front of you so that when you're going fast it is able to bounce the signal off the bottom and it comes back to where the boat has traveled to. When you're going slow you're bouncing it out in front of you but it comes back up in front of you. Sorry but I can't find a picture of a Garmin transducer. Hope this helps.
Posted on Jun 02, 2009
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Posted on Jan 02, 2017
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