Question 1745Navigation General70% 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?
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.
Related Questions
#1743 It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE? #1744 Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is _______________.#1746 The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? #1747 A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun? #1748 Universal time (UTI) is another name for _______________.