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- Q135 - Navigation Problems: Oceans
175. On 17 March your 0520 DR position is LAT 27° 23.0' N, LONG 39° 42.0' W. At this time you observe an unidentified star bearing 270° T with an observed altitude of 46° 30.2'. The chronometer reads 08h 22m 15s, and is 01m 45s fast. What star did you observe?
Arcturus's sidereal hour angle and declination, when used with the correct Greenwich Mean Time and DR position, produce a computed altitude and azimuth matching the observed values.
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