Question 210Navigation General

70% to pass

When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the _______________.

A GHA Aries
B LHA Polaris
C LHA Aries
D GHA Polaris
AI Explanation

The correct answer is C) LHA Aries. When determining compass error by an azimuth of Polaris, you need to enter the Nautical Almanac with the Local Hour Angle (LHA) of Aries. The LHA of Aries is the angle between the meridian and the hour circle passing through the vernal equinox, which is used to calculate the azimuth of Polaris and subsequently determine the compass error. The other options are incorrect because GHA Aries and LHA Polaris are not the appropriate values to enter the Nautical Almanac for this procedure. GHA Polaris is also not the correct value, as the azimuth of Polaris is calculated using the LHA of Aries, not the GHA of Polaris.

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