Dave, My
apologies, I could have been clearer. I only
applied a dip correction when bisecting the bubble with the natural sea horizon
to establish an estimated index error. I did this to simply get an idea of the
index error. I actually accomplished this from my balcony which overlooks the
sea aprox 1/2 mile away from an elevation of about 250 ft. The sextant read
-34' from which I subtracted a dip correction of -15.3 to arrive at an
estimated -19 index error. Finding
that it was significant, I carried out the series of shots using correct bubble
sextant sight reduction procedures to find an average intercept of -17.3 with a
standard deviation of 2.0'. This seemed to confirm my balcony index error
estimate. Dave
Harwood
From: waldendand@yahoo.com
To: NavList@fer3.com
Date: Fri, 25 Nov 2011 05:12:00 -0800
Subject: [NavList] Re: AN-5851-1 Repair
what was your dip correction?
Check on applying dip when using a bubble.
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