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Boat telegraphs are a form of communication device used to transfer orders of change in speed or direction from the bridge to the engine control room. The engine order telegraph consists of a lever which can be moved over different speed positions for ahead and astern direction. The initial movement of the telegraph is always from the navigation bridge and is done by moving the lever in the required direction, which rings the telegraph bell of both the locations (Engine room and Bridge). Modern EOTs on vessels which still use them use electronic light and sound signals. Traditional EOTs required a pilot wanting to change speed to ring the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge.
| Characteristics | Values |
|---|---|
| Purpose | Communicating device to transfer orders of change in speed or direction from the bridge to the engine control room |
| Initial movement | Moving the lever in the required direction |
| Acknowledgement | Engineer officer acknowledges the telegraph of the engine room to the same position as that of the bridge |
| Modern ships | Directly connected with the engine controls and doesn't require involvement of engine room personnel |
| Modern EOTs | Use electronic light and sound signals |
| Traditional EOTs | Required a pilot wanting to change speed to "ring" the telegraph on the bridge, moving the handle to a different position on the dial |
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What You'll Learn
The lever is moved in the required direction
The lever on a boat telegraph is moved in the required direction to indicate a change in speed or direction. The lever is moved over different speed positions for ahead and astern direction. This movement rings the telegraph bell in both the engine room and the bridge. After hearing the bell, the engineer officer acknowledges the telegraph of the engine room by moving it to the same position as the bridge, which stops the ringing of the bell. This ensures that the correct movement is acknowledged and the engine speed and direction is controlled accordingly.
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The bell rings in both the engine room and bridge
The bell rings in both the engine room and the bridge to signal a change in speed or direction. The lever is initially moved on the bridge, which rings the bell in both locations. The engineer officer in the engine room then acknowledges the telegraph by moving the lever in the engine room to the same position as the bridge, which stops the bell from ringing. This ensures that the correct movement has been acknowledged and the engine speed and direction can be controlled accordingly.
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The engineer officer acknowledges the telegraph
The telegraph on board a ship is used as a communicating device to transfer orders of change in speed or direction from the bridge to the engine control room. The engine order telegraph consists of a lever which can be moved over different speed positions for ahead and astern direction. Modern EOTs on vessels use electronic light and sound signals, while traditional EOTs required a pilot wanting to change speed to "ring" the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge. In modern ships with automation and controls, the bridge telegraph is directly connected with the engine controls and it doesn’t require involvement of engine room personnel.
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The engine room telegraph is moved to the same position as the bridge
The engine order telegraph is used as a communicating device to transfer orders of change in speed or direction from the bridge to the engine control room. The lever can be moved over different speed positions for ahead and astern direction. Modern EOTs use electronic light and sound signals, whereas traditional EOTs required a pilot wanting to change speed to ring the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge.
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The bell stops ringing
The engine order telegraph consists of a lever which can be moved over different speed positions for ahead and astern direction. The initial movement of the telegraph is always from the navigation bridge and is done by moving the lever in the required direction, which rings the telegraph bell of both the locations (Engine room and Bridge).
On modern vessels, EOTs use electronic light and sound signals. Traditional EOTs required a pilot wanting to change speed to "ring" the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge.
In modern ships with automation and controls, the bridge telegraph is directly connected with the engine controls and it doesn’t require involvement of engine room personnel.
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Frequently asked questions
Boat telegraphs are used as a communicating device to transfer orders of change in speed or direction from the bridge to the engine control room. The engine order telegraph consists of a lever which can be moved over different speed positions for ahead and astern direction. The lever also rings a bell in the engine room to alert the engineer officer to the change.
Modern boat telegraphs use electronic light and sound signals. In modern ships with automation and controls, the bridge telegraph is directly connected with the engine controls and it doesn’t require involvement of engine room personnel.
Traditional boat telegraphs required a pilot wanting to change speed to "ring" the telegraph on the bridge, moving the handle to a different position on the dial. This would ring a bell in the engine room and move their pointer to the position on the dial selected by the bridge.
