Originally Posted by boristhebold
Hull mounted depth sounders, the pain of my life, mine is getting worse, doesnot show depth at anything above about 10 knots. Any advice on angles or anything else that might help without resulting in getting a through hull sounder. ? Particularly interested in hearing from any Cobra owners with boats around 2005/2006 which will probably have the same type of sounder.
Might help if you say what type you've got to begin with.
I assume you're talking about a through-hull transducer. If it used to work and doesn't any more, it will most likely be a failing bond between whatever medium the ducer is mounted in and either the transducer face itself or the hull; a lack of that medium (in the case of an oil pool); or a failing transducer. Worst case, I guess, would be a delaminating hull.
The fact that it works at all makes it sound like the electronics are OK, but something is preventing either clean transmission or reception of the sound signal.