USCG USCG GENNAV
Set 8 • Question #232 of 246
Launch Interactive Practice Room When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
A
zone time
B
sunrise
C
time of local apparent noon
✓ Correct Answer
D
local mean time
USCG NMC Regulatory Explanation
The equation of time is the difference between apparent solar time (sundial time) and mean solar time (clock time). When the mean Sun is ahead of the apparent Sun, the apparent Sun crosses the meridian after 1200 Local Mean Time, giving time of local apparent noon.
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