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This
system is fitted to convey the required engine direction and speed from the
bridge to the engine room personnel. Under normal bridge control of the main
engine the telegraph function is disconnected, but in engine room control the
bridge control lever converts to becoming a transmitter/receiver for the
bridge/engine room communications link. Note that the telegraph system is
powered from a separate supply than the bridge control panel.
As
well as the standard bell ringing when bridge and engine telegraphs are not
aligned, the telegraph system also indicates:
·
Wrong way alarm. This indicates that the engine
room telegraph and engine rotation are opposite. This is indicated by the wrong
way light and dedicated alarm bell.
·
Failure of remote system power supply. Indicates
that the engine can no longer operate from bridge control. Note this failure
could also disable the control room control, and emergency control could be
required.
·
Internal failure. Indicates a communication
failure between the telegraph panels
·
FWE/Stand By/At Sea. These indicators are fitted
to supplement the engine telegraph orders.
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