At 1210 zone time on 1 December, you depart Seattle, LAT 47°36.0'N, LONG 122°22.0'W (ZD +8). You are bound for Guam, LAT 13°27.0'N, LONG 144°37.0'E, and you estimate your speed of advance at 20 knots. The distance is 4,948 miles. What is your estimated zone time of arrival at Guam?

Correct Answer: Option D — 1334, 12 December

Time of arrival calculation requires determining total steaming time from distance and SOA, accounting for the zone description difference between Seattle (ZD +8) and Guam (ZD -10). Adding elapsed time yields zone time of arrival on 12 December at 1334.