Which of the following vessel speeds corresponds with 1800 rpm engine speed?

The vessel speed that corresponds with an engine speed of 1800 RPM is determined by the specific design and characteristics of the vessel and its propulsion system. In this case, an engine speed of 1800 RPM is generally associated with a range of vessel speeds based on typical performance factors such as propeller pitch, hull design, and load conditions.

Choosing 24 knots indicates a standard performance expectation for many vessels operating at that engine speed, making it a realistic and commonly achieved speed. This velocity aligns with typical operational data for Fast Response Cutters, reflecting that 1800 RPM strikes a balance between efficiency and power output necessary for effective maneuverability and response during various maritime operations.

The other speeds listed do not correspond to the expected performance at 1800 RPM for most vessels of this type due to inefficiencies or higher power demands at that RPM, which are less common for typical operational contexts in the Coast Guard's Fast Response Cutters.