You are on a voyage from St. John, Canada to Galveston, TX. The distance is 2280 miles, and the speed of advance is 15.0 knots. You estimate 16.5 hours for bunkering enroute at Ft. Lauderdale, FL. If you sailed at 1642 hours (ZD +4), 27 February, what was your ETA (ZD +6) at Galveston?

Correct Answer: Option A — 1512, 6 March

Calculate total transit time: 2280 miles / 15 knots = 152 hours, plus 16.5 hours bunkering, totaling 168.5 hours. Adding 168.5 hours to the departure time of 1642 on 27 February, and adjusting for the 2-hour zone difference (ZD +4 to ZD +6), results in an ETA of 1512 on 6 March.