An engine order telegraphs otherwise referred to as Chadbourn is a special communication tool that is often used on water vessels for the pilot who is at the bridge to inform the engineers who work in the engine section to calibrate the engine to suit a particular speed. The modern day engine telegraph devices often come with electronic light and special light signals.
The engine order telegraph must be installed with one being placed on the bridge and the alternative one on the engine section. Besides that, its also important two have tow alarms in both rooms to inform the engine workers as well. The order is often given by rotating the dial to a particular position on the handle face.
The engine telegraph plays a major role in the communication activities that often occur in the ship. Besides that, the ship comprises of various components such that it’s highly critical that the workers take the time to understand the communication signals of the given engine telegraph message.
The conventional engine telegraph devices of necessitated that a pilot who needed to alter the velocity to ring the telegraph on the bridge, and rotate the handle to a varying position. As a result, this would cause a bell to ring in the engine section and rotate the pointer to the required position on the dial that was pre-selected on the bridge. When the engineers hear the sound of the bell, they rotate the handle to a similar position to inform the others that they have received the order, and they, therefore, calibrate the engine velocity appropriately.
When the ship pilot needs to or perhaps has an urgent demand for an increase in velocity, then the handle is rotated well over three times such that the engine section bell also rings a similar amount of times and is audible enough for the engine workers.