You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?

Question

Accepted Answer

Option D: 1342. Required depth is draft (28 ft) plus clearance (2 ft) minus charted depth (26.5 ft), needing 3.5 feet of tide at the obstruction. Determine the time the tide reaches 3.5 ft near Sandy Hook, then subtract the 1h 40m steaming time to find the departure time of 1342.