Chart Navigation & Plotting · Speed-Time-Distance — Fuel Endurance
Your vessel carries 1,500 gallons of usable fuel and burns 50 gallons per hour at a cruising speed of 11 knots. What is the approximate fuel range (still water)?
- A30 NM
- B300 NM
- C165 NM
- D330 NM✓ Correct
Explanation
Endurance = 1,500 gal ÷ 50 gal/h = 30 hours. At 11 knots, range = 30 h × 11 kt = 330 NM. Prudent planning also reserves a fuel margin, so usable range to a destination should be less.
Authority: Bowditch (Pub. No. 9), Voyage Planning
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