USCG Exam PracticeLeeway allowance in plotting
Navigational errors described in Bowditch include instrument error, observation error, plotting error, and computation error. Which additional fundamental assumption is identified as a source of cumulative navigational error?
- A. That the vessel's compass has no deviation
- B. That the chart datum matches the actual water depth
- ✓ That the vessel has held the planned courseCorrect
- D. That current and leeway are negligible on short passages
Why C is correct
Bowditch Ch. 23 §2301 specifically identifies the basic assumption that the vessel has held the planned course as a source of navigational error, and states that cumulative errors must be checked against fixes whenever possible.
Cited:Bowditch Ch. 23 §2301