You are on a voyage from Halifax, Nova Scotia to Galveston, TX. The distance is 2138 miles, and the speed of advance is 12.5 knots. You estimate 18.0 hours for bunkering enroute at Port Everglades, FL. If you sail at 0648 hours (ZD +4), 12 June, what is your ETA (ZD +5) at Galveston?

Correct Answer: Option A — 0250, 20 June

Steaming time equals distance divided by speed (2138 / 12.5 = 171.04 hours). Adding 18 hours for bunkering totals 189.04 hours (7.88 days). Factoring time zone change from ZD +4 to ZD +5 yields an ETA of 0250 on 20 June per standard navigational voyage planning.