Question 13Navigation Problems
70% to passWhile enroute from Cape Town to Rio a vessel's course is 281°pgc. The variation for the locality is 24°W. The deviation is 4°E. The gyro error is 2°W. What is the true course made good?
A
261°T
B
279°T
C
301°T
D
283°T
AI Explanation
The correct answer is B) 279°T. To arrive at this answer, we need to convert the given course of 281°pgc (compass course) to the true course made good. First, we need to apply the variation of 24°W to the compass course, which gives us 281°pgc - 24°W = 257°T. Next, we need to apply the deviation of 4°E, which gives us 257°T + 4°E = 261°T. Finally, we need to apply the gyro error of 2°W, which gives us 261°T - 2°W = 279°T. The other options are incorrect because they do not properly account for the variation, deviation, and gyro error in the correct sequence to arrive at the true course made good.
Related Questions
Q@q.QuestionNumber:On 13 November at 0438 ZT, morning stars were observed and the vessel's position...
Q@q.QuestionNumber:The speed necessary to reach port at a designated time is 18.7 knots. The propel...
Q@q.QuestionNumber:On 29 July your 1930 zone time DR position is LONG 164°26.0' E. At that time you...
Q@q.QuestionNumber:On 25 June at 0612 zone time, morning stars were observed, and the vessel's posi...
Q@q.QuestionNumber:On 10 June your 1712 zone time DR position is LAT 25°10.0' S, LONG 06°58.0' E. Y...
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