Navigation Problems USCG Question #680 (Set 20)

You are on a voyage from Limoy, Costa Rica to Los Angeles, CA. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate 24.0 hours for bunkering at Colon, and 12.0 hours for the Panama Canal transit. If you take departure at 1836 hours (ZD +6), 28 January, what is your ETA (ZD +8) at Los Angeles?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 1336, 8 February

Steaming time equals distance divided by SOA (3150 / 14 = 225 hours). Add 24 hours for bunkering and 12 hours for the canal, yielding 261 total hours (10.875 days). Adding this elapsed time to departure in ZD +6 and adjusting for the time zone change to ZD +8 yields 1336 on 8 February.

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