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?

Question

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

Accepted Answer

Option B: Altair. Calculate the Greenwich Hour Angle (GHA) of Aries and the Sidereal Hour Angle (SHA) of the body. Using the chronometer time (00h 23m 24s + 01m 32s error), determine the Local Hour Angle (LHA). Comparing the calculated LHA and declination against the Nautical Almanac identifies the body as Altair.

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

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?