On 22 June your 0424 DR position is LAT 26°18.5' N, LONG 124°18.2' W. You observe an unidentified star bearing 249°T at an observed altitude (Ho) of 52°50.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?

Correct Answer: Option D — Altair

Convert chronometer time to GMT and calculate GHA Aries. Determine LHA using the DR longitude. By comparing the calculated LHA and declination with the observed altitude of 52°50.7' and bearing of 249°T, the celestial coordinates confirm the star is Altair.