USCG Exam PracticePlotting with variation and deviation (T-V-M-D-C)
According to Bowditch, navigational errors arise from several sources. Which of the following is listed as a recognized source of navigational error?
- ✓ Computation errorCorrect
- B. Compass rose misalignment on the chart
- C. Incorrect ARPA vector time-scale selection
- D. Failure to log waypoint ETAs
Why A is correct
Bowditch Ch. 23 §2301 identifies instrument error, observation error, plotting error, computation error, and the assumption that the vessel has held the planned course as sources of navigational error. Computation error — which includes errors in applying T-V-M-D-C — is explicitly listed. The other options are not enumerated in the supplied source.
Cited:Bowditch Ch. 23 §2301