Current Exhibits
Engine Order Telegraph
| The Engine Order Telegraph is an internal communication device used between the bridge and the engine room’s main control to govern the ship’s speed. The device consists of two separate controls: an indicator for shaft revolutions (shaft speed), and a display for speed ahead and speed astern. Speed ahead consists of 1/3, 2/3, full speed and flank speed; speed astern consists of 1/3, 2/3, and full speed astern. The engines may also be set on standby- awaiting an order for ahead or astern. An engineering log is kept that records the time and type of each of the orders transmitted from the bridge to main control.
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