At 0530 zone time on 20 December, you depart Cape Town (ZD -1). You are bound for New York (ZD +5), and you estimate your speed of advance at 25 knots. The distance is 6,762 miles. What is your estimated zone time of arrival at New York?

Correct Answer: Option D — 0600, 31 December

Calculate steaming time by dividing distance (6,762 miles) by speed (25 knots), resulting in 270.48 hours (11 days, 6 hours, 29 minutes). Accounting for the 6-hour zone time difference between Cape Town (ZD -1) and New York (ZD +5) determines the exact zone time of arrival as 0600 on 31 December.