BCC wrote in message
...
Needs to be round, maybe 3" dia, waterproof front, prefer one that
runs off D cell or other battery so it still runs when the cockpit
instrument breaker is off.

Most sailing instruments look to be square these days.


Take a peek at these people.
*** http://www.downeaster.com/ecom/storefront.aspx ***

I was given their top of the line 'tide clock' as a retirement gift.
It was gaining about an hour over a 1.5 week period so I called the local
dealer. He said just to bring it back and he'd swap
for another. (note: clock mechanism made in China)