I've tried traditional magnetic compasses with no luck, but what I have now works within limits. It's a super-cheapo digital compass with little suckers that one would normally put on a car windshield and cost something like 30 bucks. It isn't accurate to degrees, but will say for instance NNE. What I've found is it works, but only if you recalibrate each time out. Recalibration involves turning the sub in a circle. I think these electronic compasses must do a better job at compensating for all the steel and currents in our little boats. I have it stuck on the inside of the dome. The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. From: owner-personal_submersibles@psubs.org on behalf of ShellyDalg@aol.com Sent: Sun 8/9/2009 8:19 PM To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] Compass Brent had a few pics of the sub Persistence that I haven't seen before, and one thing that caught my eye was his compass viewable through the window. I followed the discussion last year on compass types and how they do or don't work inside a steel sub. I got the impression back then that only an expensive gyro compass would work for our little subs. Is it workable to have the compass outside like that? There was also one on another video I watched along with the Snoopy Wall Dive one Alec just put up. Protecting and oil compensating a good quality compass ain't so bad if it works at showing north. This was one of those things I've saved for future investigation but the solution looks to be right there. Anybody got any info on this? Frank D. ________________________________
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