On 14 January your 0550 DR position is LAT 25°26.0'N,... - USCG Navigation Problems

On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

A Eltanin

B Gienah

C Gacrux

D Kochab

AI Explanation

The correct answer is B) Gienah. To determine the star observed, we need to use the information provided (latitude, longitude, observed altitude, and chronometer time) to calculate the star's position and compare it to the options given. Using the calculated position and the time, we can determine that the star observed is Gienah. This is because Gienah is the only star among the options that matches the given position and altitude at the specified time. The other options, Eltanin, Gacrux, and Kochab, do not align with the provided information and can be eliminated as the correct answer.

Question 97Navigation Problems

On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?