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Reducing back sights
From: Jim Thompson
Date: 2004 Aug 10, 07:50 -0300
From: Jim Thompson
Date: 2004 Aug 10, 07:50 -0300
Neither Dutton's nor Bowditch explain back sight reduction in sufficient detail for me to be confident about the process. My understanding is this: 1. Raw altitude = back sight. 2. Corrected raw altitude: apply Index Correction and dip. 3. Corrected hs = 180d minus corrected raw altitude. 4. Then reduce the corrected hs as usual. True, or bungled? Jim Thompson jim2@jimthompson.net www.jimthompson.net Outgoing mail scanned by Norton Antivirus -----------------------------------------
