My 06 obv has a depth finder that looks like it was most likely aftermarket. In general it seems to work ok, but has a couple issues:

- Occasionally it doesn't report the depth. I haven't pinpointed what the situations are, and it works more often than not, but sometimes it's obviously on and it just doesn't report anything (reads '--').

- In a lake we vacation on (very deep in most places) it will often beep like the depth is too low, even when I'm in 55'+ of water. If I hit the 'up' button it stops, but might start again (maybe on next start). I don't seem to ever get this behavior when I'm home on the river (8-15' average depth). I assume it's something related to the larger depth, but it seems to report the depth fine but is still beeping like I'm too shallow.

Any ideas?