USCG USCG NAV
Set 5 • Question #125 of 247
Launch Interactive Practice Room In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 077°pgc. The helmsman was steering 307°pgc and 320° per standard magnetic compass at the time. Which statement is TRUE?
A
The gyro error by observation is 2°E.
B
The deviation based on the observation is 15°W.
C
The magnetic compass error is 14°W.
✓ Correct Answer
D
The true line of the range is 079°.
USCG NMC Regulatory Explanation
In practical navigation calculations and chart plotting regarding 'In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 077°pgc. The helmsman was steering 307°pgc and 320° per standard magnetic compass at the time. Which statement is TRUE', the calculated solution is: 'The magnetic compass error is 14°W.'.
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