SIB0407 NEWLY DEVELOPED SHIP TELEGRAPH WITH LONG WOODEN + BRASS TOWER WITH LIGHT SYSTEM

NEWLY DEVELOPED SHIP TELEGRAPH WITH LONG WOODEN + BRASS TOWER WITH LIGHT SYSTEM

As the word describes, the telegraph on board 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.

Communication between ship and shore was by Morse code, as it was for conventional telegraphy. The equipment only transmitted messages for about 300 miles in daylight, although that figure doubled or tripled after dark thanks to the refraction of long-wave radiation in the ionosphere