When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — for inaccuracies in the reference level
Per Bowditch navigation standards, apparent altitude is derived by removing instrument errors via index correction and adjusting for the observer's height of eye, which establishes the correct celestial horizon reference level.
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