Rolls-Royce Helicon X3, User Manual

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Operating Instructions
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Page 19 of 22 Doc. No.: 13S000411
Revision: A Copyright © 2010 Rolls-Royce plc
Figure 7 Crash Stop Procedure Fixed pitch Azimuth thruster
1. Normal ahead condition
2. Thruster athwart ship during crash stop
3. Astern position (braking mode)
Note: Full power/rpm is not allowed to be used in stopping test.
7 Backup Operation
Note: No pitch reduction or Helicon X3 Load control functions are included in
the Backup system. The Operator must be careful not to overload the
engine or propeller system.
Note: Load control system handled by the frequency converter drive system
shall not be affected by changes in operation mode for the remote control
system.
7.1 Steering Backup Control at Bridge or Engine Control
Room
The Backup Control system consists of a closed loop control of the azimuth position by
means of a lever. The Backup Control is a separate system, and is independent of the
Normal Control system. Any major system failure in the Normal Control system will
automatically switch to and engage the Backup Control.
AZIMUTH (steering) can now be controlled by using the lever as in normal operation.
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