1999 Chris Craft 200 - what is this?

Darkhorse1201

Petty Officer 2nd Class
Joined
Oct 17, 2005
Messages
108
I just bought a 1999 Chris Craft BR 200 with a 5.0 GL Volvo Penta with only 251 hrs. on it. Mechanically it's very good and was well maintained, body is good shape (nothing a buff out won't fix ) but the upholstery is a mess. But looking at the dash there is a gauge I'm not sure what it does. Perhaps some kind of depth finder cuz when I put the outdrive all the way down it wouldn't come up until I played with the buttons on this. What is it and how does it work? Thanks in advance
 
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