USCG Boat Crew Practice Exam 2025 – Comprehensive Test Preparation

To determine the total fuel consumption at a speed of 35 knots, it is essential to consider how fuel consumption is generally calculated in relation to speed and duration.

When discussing fuel consumption in the context of a vessel's speed, it is often expressed in terms of the hours that the engine can operate before depleting the fuel tank. The total fuel consumption at different vessel speeds can vary significantly due to the efficiency of the engines and the specific fuel consumption rates at various speeds.

In this scenario, the correct answer implies that at a speed of 35 knots, the duration that the boat can continuously run is 18 hours. This figure suggests that the vessel has sufficient fuel to operate at that speed for that duration without running out of fuel. It is likely based on calculations that involve the vessel's fuel capacity, engine performance, and operational limits.

The other options would incorrectly indicate the number of hours the vessel could operate at the given speed, either overestimating or underestimating its actual fuel capacity or consumption rate. Thus, understanding fuel consumption and operational hours at certain speeds is critical for effective and safe waterway navigation.