On 23 June your 0900 zone time DR position is LAT 21°26.0'N, LONG 137°46.0'W. Your vessel is on course 059°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?

Correct Answer: Option B — 1210

Calculate the longitude difference between the DR position and the zone meridian. Using the Equation of Time from the Nautical Almanac for 23 June, apply the correction to the zone meridian time. The vessel's movement toward the east meridian necessitates an earlier LAN time, resulting in 1210 ZT.