A chart shows a sounding of 8 feet. The predicted height of tide at the time of transit is +3 feet. The vessel's draft is 6 feet. What is the underkeel clearance?

A. 2 feet
✓ 5 feetCorrect
C. 8 feet
D. 11 feet

Why B is correct

Actual depth equals charted sounding plus predicted height of tide: 8 + 3 = 11 feet. Underkeel clearance equals actual depth minus vessel's draft: 11 - 6 = 5 feet. (Bowditch Ch. 9 §904)

Cited:Bowditch Ch. 9 §904

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