You are to sail from Elizabethport, N.J., on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 25.5 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?

Question

Accepted Answer

Option B: 0121. Draft of 27 feet plus 2 feet clearance minus 25.5 feet charted depth yields a required water height of 3.5 feet. Interpolate the tide table curves for 17 November and subtract the 1h 50m transit time to arrive at departure.