Hello all, anybody have a garmin GSD-21 sounder box, or know where to get one? Thanks ,Red :dance:
redhead78 . Dec 30, 2009 680 jeanneau 38 gin fizz sloop Summer- Keyport Yacht Club, Raritan Bay, NJ, Winter Viking Marina Verplanck, NY Mar 10, 2011 #1 Hello all, anybody have a garmin GSD-21 sounder box, or know where to get one? Thanks ,Red :dance:
