USCG Exam PracticePlotting with variation and deviation (T-V-M-D-C)
A vessel's deviation card shows 3°W on the current heading. The chart compass rose shows variation of 7°E. The true course plotted on the chart is 045°T. What is the compass course to steer?
- ✓ 041°CCorrect
- B. 049°C
- C. 035°C
- D. 055°C
Why A is correct
Using T-V-M-D-C uncorrecting (true toward compass): 045°T minus 7°E variation = 038°M; 038°M plus 3°W deviation = 041°C. When uncorrecting, subtract easterly errors and add westerly errors.
Cited:Bowditch Ch. 6 §602