On 12 February your 0900 zone time DR position is LAT 16°43.0'N, LONG 51°42.0'W. Your vessel is on course 093°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?

Correct Answer: Option C — 1237

Calculate the longitude difference between the DR position (51°42.0'W) and the zone meridian (60°W). The vessel is 8°18.0' east of the zone meridian. At 18.5 knots, the vessel closes this distance, resulting in a LAN time of 1237. This follows standard time-longitude conversion principles in Bowditch.