單項(xiàng)選擇題

Sidereal time is used by navigators when（）.

A.used with the equation of time
B.used in the form of LHA Aries
C.calculating the time of moonrise
D.determining local apparent time

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單項(xiàng)選擇題

Sidereal time is NOT used（）.

A.as the basis for star charts
B.to enter a star finder
C.in sight reduction using Pub 249
D.in sight reductions of planet observations

單項(xiàng)選擇題

Right ascension is primarily used by the navigator for（）.

A.calculating amplitudes
B.calculating great circle sailings by the Agiton method
C.entering the Air Navigation Tables (Selected Stars) Pub 249
D.plotting on star finders

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Sidereal time is used by navigators when（）.

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Sidereal time is NOT used（）.

Right ascension is primarily used by the navigator for（）.