Who is responsible for directly controlling the shaft rpm?

The throttle-man is the individual responsible for directly controlling the shaft rpm. This role is crucial in the operation of a naval vessel, as the throttle-man manages the engine speed and, consequently, the propulsion of the ship by adjusting the throttle settings. This control is vital to ensure that the ship can achieve optimal speed, maneuverability, and efficiency while operating under various conditions.

The throttle-man works closely with the engineering and bridge teams to maintain communication and coordinate operations, ensuring that maneuvers are executed smoothly. This position requires a keen understanding of the propulsion system and the effects of engine speed on ship navigation. Proficient control over the shaft rpm allows for precise adjustments in response to navigational commands or changes in mission requirements.

In contrast, other roles such as the reactor operator, cooling officer, and load dispatcher have different responsibilities that do not directly involve manipulating the shaft rpm. The reactor operator oversees the nuclear reactor's safe operation, the cooling officer manages the cooling systems vital for maintaining temperatures within safe limits, and the load dispatcher handles the distribution of power generated by the reactor to various systems and equipment. Each function is essential to the overall operation of the ship, yet only the throttle-man is tasked specifically with adjusting the propulsion system's rpm.