Question 1745Navigation General

70% to pass

The Local mean time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?

A 0652
B 1859
C 0659
D 1852
AI Explanation

The correct answer is C) 0659. To determine the time to use in the Nautical Almanac, we need to convert the Local Mean Time (LMT) of the Local Apparent Noon (LAN) to Greenwich Mean Time (GMT). The formula for this conversion is: GMT = LMT + (Longitude / 15). Given information: - LMT of LAN = 1152 - Longitude = 73°15'E Calculation: GMT = 1152 + (73.25 / 15) = 1152 + 4.88 = 1656.88 Rounding to the nearest minute, the GMT time is 1657. Therefore, the time you would use to enter the Nautical Almanac to determine the declination of the Sun at LAN is 0659, which is 12 hours earlier than the GMT time of 1657. The other options are incorrect because: A) 0652 is 7 minutes earlier than the correct time. B) 1859 is 2 hours later than the correct time. D) 1852 is 1 hour and 55 minutes later than the correct time.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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