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Ritchie Compass Submersible?
Greetings:
I recently read some USENET posts concerning scuba navigation boards. One stated the rather than buying one, it was easy to make one using a Ritchie compass. Surfing the 'net, I see that Ritchie compasses are traditionally used on board boats. So I'm curious how well they stand up being submersed. To what depth can they be used in a scuba application? Is there a particular model number that is recommened for scuba use? I also notice that some models are listed as having a low-light/night viewing capability. How are they illuminated? By using a light and battery source (in which case I doubt they are submersibile), or is it some sort of chemical illuminiation (like tritium on watch dials).... Your assistance is appreciated! |
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