Question 1534Navigation General

The correct answer is B) instrument error. The correction tables in the Nautical Almanac for use with Moon sights do not include the effects of instrument error. The tables only provide corrections for factors such as augmentation, semidiameter, and parallax. Instrument error, which is the inaccuracy introduced by the navigational instruments used to take the celestial observation, is not accounted for in these tables and must be determined and applied separately by the navigator. The other answer choices are incorrect because the Nautical Almanac tables do include corrections for augmentation (A), semidiameter (C), and parallax (D), but not for instrument error.