On 17 March your 0800 zone time DR position is LAT 21°27.0'N, LONG 65°25.0'W. Your vessel is on course 105°T at a speed of 17.5 knots. What is the zone time of local apparent noon (LAN)?

Correct Answer: Option C — 1225

The DR position is 65°25.0'W, which is 4°35.0' west of the 60°W zone meridian. Converting this to time and accounting for the vessel's speed of 17.5 knots on course 105°T, the vessel reaches the meridian at 1225. This follows standard celestial navigation time-keeping procedures for determining LAN.