NAMING OF AMPLITUDE: The prefix of True Amplitude is E if the body is rising and W if the body is setting. The suffix is same as that of the declination.
T Az = 288.0˚ (T)
C Az = 285.0˚ (C)
Error = 03.0˚ E
Variation = 02˚ W
Deviation = 5.0˚E
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Jan 20th 2008, in DR 54˚ 20’S 046 ˚ 27’W, the sun set bearing 234˚(C). If variation was 3˚ W, find the deviation of the compass.
LMT Sunrise = 20d 20h 21m 00s
LIT (W) = (+) 03h 05m 48s
GMT Sunset = 20d 23h 26m 48s
Dec sun 20d 06h = S 20˚ 05.7’
d (-0.5) = – 00.2’
Dec 2d 06h 37m 00s = S20˚ 05.5’
We know that :
NOTE:
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′