Recent Problems in Garmin Gsd 21 Sounder Blackbox Fishfinder Module

GSD 21 Garmin Sounder problems
I have a GSD 21 Garmin Sounder networked to my 3210 GPS. Yesterday the depth sounder was flashing all day and not r...
Product: Garmin Gsd 21 Sounder Blackbox Fishfinder Module | Posted: 13 years, 9 month(s) ago
I have just fitted a garmin 3005c and transducer but i am not getting sonar info, depth, water temp.
Do i need i do not have a gsd sounder module. Do i need one?
Product: Garmin Gsd 21 Sounder Blackbox Fishfinder Module | Posted: 13 years, 8 month(s) ago
I recently purchased boat with garmin 3206 w/GSD21 mod. and Transducer used for somar.
Will I receive speed and temp data with this unit? Have no info book.
Product: Garmin Gsd 21 Sounder Blackbox Fishfinder Module | Posted: 13 years, 2 month(s) ago

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