USCG Exam PracticePlotting with variation and deviation (T-V-M-D-C)
A vessel observes a lighthouse bearing 090° by compass. Deviation on the current heading is 3°E and variation is 6°E. What is the true bearing of the lighthouse?
- ✓ 099°TCorrect
- B. 081°T
- C. 087°T
- D. 093°T
Why A is correct
Correcting compass bearing to true: 090°C plus 3°E deviation = 093°M; 093°M plus 6°E variation = 099°T. The same T-V-M-D-C sequence applies to bearings as to courses, adding east when correcting toward true.