Navigation General · Time — Zone Change
Crossing time zones eastbound, ship's clocks are generally:
- AAdvanced (set ahead)✓ Correct
- BRetarded (set back)
- CLeft unchanged
- DStopped
Explanation
Steaming east, the sun is met earlier, so clocks are advanced (set ahead) one hour per 15° of longitude (zone). Westbound, clocks are retarded. Watchstanding rosters and the deck log must reflect each zone change.
Authority: Bowditch
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