Operating Instructions
Page 18 of 22
Doc. No.: 13S000411
Revision: A
Copyright © 2010 Rolls-Royce plc
5.3
Astern
6 Crash Stop
In this section the recommended practice with regards to the crash stop manoeuvre is
described.
6.1
Crash Stop Procedure
1.
Reduce power/rpm order to approx. 10% and turn both thruster levers in outward
direction softly and simultaneously until the azimuth order is 90 degrees. The
correct rotational direction for each thruster is shown in the figure below.
2. When thruster is turned 90 degrees outward, increase the power/rpm order to
maximum and continue to turn the thruster levers softly and simultaneously to 180
degrees.
3. When ship speed reaches 0, reduce the power/rpm to 0.
Turn stbd side using both thrusters
Straight astern
With any power, but both prime movers
running with equal power.
Depending of the hull form it is
recommended to use both thrusters for
steering. If both propellers turn to same
direction this might cause some yaw at high
speeds.
Summary of Contents for Helicon X3
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