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Re: Question about Davis Mk 25 sextant beam converger
From: hellos
Date: 2006 May 8, 10:45 -0400
From: hellos
Date: 2006 May 8, 10:45 -0400
Greg-
Even with a better sextant, it is "proper"
practice to check for IE every time you use the sextant. I've seen IE hold at
zero for a zero, even with changing temperatures, but all it takes is one bump,
one slip, and then your sights are down the drain. Far more "professional" to
check it every time so you know it hasn't changed, instead of assuming
so.
The plastic sextants are supposed to be less
stable with temperature change, so that taking one from a warm indoor home out
into cold air, or taking one and leaving it in hot sunlight, etc., all can cause
thermal changes in the frame, which bring changes in the
IE.
