At 0915 ZT on 26 July you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD - 9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated ZT of arrival at Seattle?

Correct Answer: Option B — 0728, 7 August

Passage duration is found by dividing great circle distance by speed of advance. Applying zone time conversions between Yokohama (ZD -9) and Seattle (ZD +8) accounts for meridian crossings, establishing the estimated local time of arrival as 0728 on 7 August.