Init rudder
Defines how the system moves the rudder when switching from hand steering (Standby, FU
and NFU) to an automatic mode.
The following options are available:
•
Center
Moves the rudder to zero position
•
Actual
Maintains the rudder angle, and assumes that the current rudder angle is the trim required
to maintain a steady heading.
Rudder limit
Determines the dynamic range of the rudder before its movement is restricted and alarm is
triggered. Typical usage is to limit the amount of rudder action caused by yawing in
following sea.
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Note:
Rudder limit is not a hard limitation of the rudder range, only around the current
setpoint.
This Rudder limit does not affect Non-Follow-up or Follow Up steering.
Toe angle
This option sets the allowed angle deviation between the rudders. The feature will enhance
rudder efficiency at small rudder commands around center position, and it will reduce
vibration and/or propeller/water jet noise.
The toe angle is the angle between the rudder’s 0-position and the rudder’s actual position
(t) as shown in the illustration.
t
t
t
t
The toe angle will be applied as an offset to each rudder. Toe out (positive value), angles the
two rudders apart, while Toe in (negative value) angle them towards center.
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Note:
The toe angle is a work profile setting, and must be enabled for current work profile to
be available.
The toe angle is only available if the vessel has 2 rudders. It applies only to rudders
located on the side of the ship - it will have no effect on a rudder located in the ship
center.
The toe angle is effecting all operating modes except Standby and NFU.
When the feature is enabled, one rudder will stop moving before the other one if max./
min. rudder angles are demanded.
When the feature is enabled, the rudder bar shows rudder command instead of
measured rudder angle.
34
Work profiles
| AP70 MK2 Operator Manual
