Just wondering if anyone else has had this problem. I have the Garmin 176 on my small boat. It's a 16' heavy aluminum w/ steering console. While running the GPS vibrates so badly that I had to silicone the power cord in because it was constantly falling out. I also had to hold onto the unit 1) so I could view it and 2) so it didn't damage itself from the shaking. Well, just recently, while running across Lake Sabine, my son called to tell me the damned thing FELL OFF!!! $600 down the tube! After looking at the bracket later, we noticed it was cracked on one side. Has anyone else had shaking problems? I'm going to replace it with the 276C GPS, but I think I'l fabricate a brace for this one (and maybe a bungee cord too).