Which device is used to transmit engine orders from the bridge to the engine room?

• A. Nav System
• B. Engine Order Telegraph
• C. Sonar
• D. Radar

Answer: (B)

Engine orders from the bridge to the engine room are conveyed by a signaling device specifically designed for propulsion control. The engine order telegraph provides a clear, standardized way to transmit speed and direction commands (like full ahead, half ahead, stop, or full astern) from the bridge to the engine room. On its face, the bridge operator selects an order, and the corresponding signal is displayed in the engine room where the engineer adjusts the throttle or engine controls to match. The system is two-way and designed to be readable despite engine-room noise, with confirmation that the commanded speed is being applied, ensuring safe and synchronized operation.

Nav systems, radar, and sonar serve navigation, detection, and situational awareness functions. They guide course, detect targets, or measure ranges, but they do not transmit propulsion commands to the engine room.