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Sept 23rd 2008, the sun rose bearing 094˚(C) in DR 00˚ 00’ 120˚ 27’W when chron showed 01h 54m. If chron error was 03m 12s FAST and variation was 2.7˚W, find the deviation for the ship’s head.
LMT Sunrise = 23d 05h 49m 00s
LIT (W) = (+) 08h 01m 48s
GMT Sunrise = 23d 13h 50m 48s
As we know that:
LMT of Sunrise or Sunset are taken from the nautical almanac and needs only be interpolated and taken in whole minutes of time. If the time ofobservation is given in the problem, then given time should be used for calculation. It is necessary to remove the ambiquity of chron time.
Dec sun 23d 13h = S00˚20.7’
d(+01.0) = + 00.8’
Dec 2d 06h 37m 00s = S00˚ 21.5’
We know that :
In question number 4 of exercise 29 (RSAz Sun) the LMT should be 30d 07h 33m 00s
LMT should be 30D 07h 35m 58s ……….. and Dec is S 21deg 40.1′