NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Photo sextant sights
From: Peter Fogg
Date: 2008 Aug 7, 08:23 +1000
From: Peter Fogg
Date: 2008 Aug 7, 08:23 +1000
Thomas Kleemann schrieb: > I'm quite new to celnav, so I never used it for that purpose. > It's rate is so small that I do not even bother setting it. In practice you would keep an eye on that rate and then adjust the recorded time before sight reduction. If you use a form for manual sight reduction it should have a field for this time adjustment: +/- > I had some insight into that WR-testing. > Don't try the 100m in reality. > The test is executed in dry conditions, 10atm for 30 seconds. > Even a dive into the pool can break the seal and let water in, > because it peaks the pressure dynamically. > > WR 50 means you can take a shower with it on, WR 100 is ok for swimming. > Watches for divers are rated at least WR 200m. Thanks for this info. Its useful to be able to forget the watch is there and hop in the water with it. Mainly, though, I take 'Water Resistant' to mean rain, splashes while washing or cooking, and salt spray won't worry it. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---