Chart Navigation & Plotting · Speed-Time-Distance — Fuel Endurance
Your vessel burns 30 gallons per hour at 12 knots and carries 600 usable gallons. Ignoring reserve, what is your approximate maximum range?
- A240 nautical miles✓ Correct
- B180 nautical miles
- C300 nautical miles
- D120 nautical miles
Explanation
Endurance = 600 gal ÷ 30 gal/h = 20 hours. Range = 20 h × 12 kn = 240 nm. Prudent planning would then apply a reserve (commonly one-third) before committing to that range.
Authority: Bowditch (Pub. No. 9), voyage planning; fuel and endurance
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