On 17 May at 0501 zone time, morning stars were... - USCG Navigation Problems

On 17 May at 0501 zone time, morning stars were observed, and the vessel's position was determined to be LAT 22°16.0'S, LONG 103°46.0'W. Your vessel is steaming at 24.0 knots on a course of 301°T. A sextant observation of the Sun's lower limb is made at 0845 zone time. The chronometer reads 03h 43m 32s, and the sextant altitude is 28°24.7'. The index error is 1.5' off the arc, and the chronometer error is 02m 02s slow. Your height of eye on the bridge is 85.5 feet. What is the azimuth (Zn) of this sight using the assumed position?

A 055.7°T

B 051.0°T

C 052.5°T

D 054.2°T

AI Explanation

The correct answer is C) 052.5°T. To determine the azimuth (Zn) of the Sun's sight, we need to use the information provided about the vessel's position, course, speed, and the sextant observation of the Sun's lower limb. Given the vessel's position, course, and speed, we can calculate the assumed position at the time of the Sun sight. Then, using the sextant altitude, chronometer time, and corrections, we can calculate the Sun's azimuth (Zn) from the assumed position. The other options are incorrect because they do not match the calculated azimuth value of 052.5°T, which is the correct answer based on the provided information and standard navigation procedures.

Question 96Navigation Problems