You are on a voyage from Valdez, AK, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15.0 knots. You estimate a layover in San Francisco, CA, of 36.0 hours. If you take departure at 0800 (ZD +10), 29 October, what is your ETA (ZD +5) at the Panama Canal?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 1900, 13 November
Determine steaming time using distance divided by speed, incorporating the layover hours. Adjust the resulting date and time by applying the zone description difference between departure (ZD +10) and arrival (ZD +5), yielding a 5-hour backward shift in local zone time per standard piloting protocols.
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