Chart Navigation & Plotting · Speed-Time-Distance
Steaming at 12 knots, how long does it take to run 30 nautical miles?
- A2 hours 30 minutes✓ Correct
- B2 hours 00 minutes
- C1 hour 50 minutes
- D3 hours 00 minutes
Explanation
Time = distance / speed = 30 / 12 = 2.5 h = 2 h 30 m. Using 60·D = S·T: T = 60 × 30 / 12 = 150 minutes.
Authority: Bowditch, American Practical Navigator (Pub. 9)
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