Your vessel consumes 268 barrels of fuel per day at a speed of 19.0 knots. What will be the fuel consumption of your vessel at 15.0 knots?

Correct Answer: Option A — 132 bbls

Fuel consumption varies proportionally with the cube of the vessel's speed according to standard marine engineering laws. Applying the admiralty coefficient formula, reducing speed from 19.0 to 15.0 knots drops daily consumption from 268 barrels to approximately 132 barrels.