Question 110Navigation Problems
70% to passOn 22 March your 1834 ZT DR position is LAT 26°13.5' S, LONG 108°36.5' W. You observe an unidentified star bearing 077°T, at an observed altitude (Ho) of 43°10.5'. The chronometer reads 01h 32m 37s and is 01m 50s slow. What star did you observe?
A
Regulus
B
Menkar
C
Rigel
D
Alphard
AI Explanation
The correct answer is D) Alphard. To determine the observed star, we can use the information provided and apply celestial navigation principles. Given the date, time, and position, we can use nautical almanacs or star charts to identify the star with the corresponding altitude and azimuth. Based on the provided information, the observed star with a bearing of 077°T and an altitude of 43°10.5' is Alphard. The other answer choices (Regulus, Menkar, and Rigel) do not match the observed celestial data at the given time and position.
Related Questions
Q@q.QuestionNumber:On 28 October morning twilight will occur around 0524 ZT. Your DR position is LA...
Q@q.QuestionNumber:On 12 April at 0515 ZT, morning stars were observed, and the vessel's position w...
Q@q.QuestionNumber:On 3 February your 0547 zone time DR position is LAT 24°18.5' N, LONG 167°25.0' ...
Q@q.QuestionNumber:On 7 May you observe Polaris for latitude at 0303 ZT. Your DR position is LAT 56...
Q@q.QuestionNumber:The true course between two points is 057°. Your gyrocompass has an error of 3° ...
Ready to test your knowledge?
Take a Navigation Problems Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App