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Re: Silicon Sea Leg 88 questions
From: Bill Noyce
Date: 2004 Jan 27, 10:35 -0500
From: Bill Noyce
Date: 2004 Jan 27, 10:35 -0500
At the end of a nice discussion of Silicon Sea problems, Peter Fogg writes: > With a shallow pan of some reflective fluid you can make > observations almost anywhere, at any time, remembering to > halve the sextant altitude (and any error of observation > it includes - an advantage of this method) before applying > the index error. Oops! Apply the index error to the sextant reading before doing anything else! Also apply corrections for imprecision of the arc, if you have that info. Then halve the result if you were using a reflecting artificial horizon. Then apply corrections for dip and refraction. -- Bill