On 22 April your 1852 ZT DR position is LAT 23°54.5'... - USCG Navigation Problems

On 22 April your 1852 ZT DR position is LAT 23°54.5' N, LONG 117°36.8' W. You observe an unidentified star bearing 129°T at an observed altitude (Ho) of 27°10.0'. The chronometer reads 02h 54m 53s and is 02m 51s fast. What star did you observe?

A Diphda

B Betelgeuse

C Arcturus

D Gienah

AI Explanation

The correct answer is D) Gienah. To determine the observed star, we need to use the information provided, including the position, observed altitude, and chronometer time, to identify the star. Using the given position, time, and altitude, we can calculate the star's celestial coordinates and compare them to the characteristics of the answer choices. The calculated celestial coordinates match the characteristics of the star Gienah, confirming it as the observed star. The other answer choices, Diphda, Betelgeuse, and Arcturus, do not have the same celestial coordinates based on the provided information, making them incorrect.

Question 92Navigation Problems

On 22 April your 1852 ZT DR position is LAT 23°54.5' N, LONG 117°36.8' W. You observe an unidentified star bearing 129°T at an observed altitude (Ho) of 27°10.0'. The chronometer reads 02h 54m 53s and is 02m 51s fast. What star did you observe?