Concerning steerable internal duct thrusters, what statement is true?

Correct Answer: Option C — The thrust direction of the steerable internal duct thruster is determined by the orientation of the water discharge vectoring ring.

Steerable internal duct thrusters, often referred to as waterjets, direct the high-velocity discharge stream using a vectoring ring or nozzle. By rotating this discharge assembly, the operator changes the direction of the thrust vector, thereby steering the vessel without needing to alter the pump's internal rotation or impeller pitch.