On 14 January your 0550 ZT DR position is LAT 25°26.0' N, LONG 38°16.0' W. You observe an unidentified star bearing 004.5°T, at an observed altitude (Ho) of 40°10.0'. The chronometer reads 08h 48m 51s and is 01m 22s slow. What star did you observe?

Correct Answer: Option A — Kochab

Calculate GMT and LHA Aries. Using the Nautical Almanac, determine the GHA and Declination of the observed body. By comparing the observed altitude and azimuth against the computed values in Pub. 229, Kochab is identified as the star matching the sight reduction parameters for the given DR position.