On Aug. 1, 2002 (use www.thenauticalalmanac.com for 2002 almanac data), you are hove-to at a DR position of 32° 08’ N, 73° 07.5’ W. Your height of eye is 9 feet, and your sextant has an index error of 1.5’ on the arc. At morning twilight, you shoot Deneb, Saturn and Capella with the following results. Reduce all three sights and determine the 0920 GMT fix position. (Use HO 249 Vol. 1 for the stars and Vol. 2 for the planet.)
Body #1 Deneb | Body #2 Saturn | Body #3 Capella | |||||
GMT GHA Aries (hr.) GHA Aries (min.) GHA Aries Ass. long. (W) LHA Aries Hs |
09:18:11 084° 47.9’ + 004° 33.5’ 89° 21.4’ – 73° 21.4’ 16° 00.0’ 38° 28.5’ |
GMT v GHA (hr.) GHA (min.) v corr. GHA Saturn Ass. long. (W) LHA d
Hs d (HO 249) Hc |
09:19:03 + 2.2 000° 17.8’ 004° 45.8’ + 0.7’ 005° 03.6’ – 073° 04.3’ 292° 00.0’ 0.0 N 22° 04.7’ 29° 37.0’ + 25 29° 33’ |
GMT GHA Aries (hr.) GHA Aries (min.) GHA Aries Ass. long. (W) LHA Aries Hs IC Dip Ha Alt. corr. Ho Hc Intercept Zn |
09:20:10 084° 47.9’ + 005° 03.3’ 089° 51.2’ – 072° 51.2’ 017° 00.0’ 40° 56.5’
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Fix position: 32° 02.5’ N, 73° 09.3’ W |
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