USCG Exam PracticePlotting with variation and deviation (T-V-M-D-C)
Bowditch identifies several sources of navigational error that must be checked against fixes whenever possible. Which of the following is listed as one of those sources?
- ✓ The basic assumption that the vessel has held the planned courseCorrect
- B. Failure to maintain a continuous ARPA watch on all acquired targets
- C. Use of buoys as the sole means of position fixing
- D. Deviation in excess of the gyrocompass calibration error tolerance
Why A is correct
Bowditch Ch. 23 §2301 states that navigational errors arise from instrument error, observation error, plotting error, computation error, and the basic assumption that the vessel has held the planned course, and that cumulative errors must be checked against fixes whenever possible.
Cited:Bowditch Ch. 23 §2301