USCG Exam PracticeTides and currents — predictions and corrections
A vessel has a draft of 8 feet. The charted sounding at the intended anchorage is 6 feet. The predicted height of tide at that time is 3 feet. What is the underkeel clearance?
- A. 2 feet
- ✓ 1 footCorrect
- C. 5 feet
- D. The vessel will be aground
Why B is correct
Bowditch Ch. 9 §904 states that actual depth equals charted sounding plus predicted height of tide (6 + 3 = 9 feet), and underkeel clearance equals actual depth minus vessel's draft (9 - 8 = 1 foot).
Cited:Bowditch Ch. 9 §904