Simrad AP70 Operation Manual page 33

- Midships moves the rudder to zero position.
- Actual maintains the rudder off set, and use this as trim value (bumpless transfer)
 Note:
Actual is only available with rudder feedback signal available.
• Default: Midships
Rudder limit
Determines the maximum rudder movement in degrees from the "used" midship position that
the autopilot can command the rudder in the automatic modes.
"Used" midship position is the rudder angle required to maintain a straight course.
The Rudder limit setting is only active during autosteering on straight courses, NOT during
course changes. This Rudder limit does not aff ect Non-Follow-up or Follow Up steering. In
Non-Follow-up or Follow Up steering, only the max. rudder limit applies.
 Note:
The max. rudder limit was set automatically to physical stop minus 3° when the rudder
feedback calibration was performed.
• Range: 5° - Max rudder limit
• Default: 10°
Tow angle
Sets the allowed angle deviation between the rudders.
 Note:
Tow angle is only available if the vessel has 2 rudders.
• Range: In 15° - 0 - Out 15°
• Default: 0°
Thruster
Thruster sensitivity
Determines how many degrees the vessel must deviate from the set
course before a thruster command is given. As the vessel deviates from its
heading, the thruster will push the vessel back. A higher value will reduce
the thruster activity and extend the lifetime, especially for on/off thrusters.
• Range: 0° - 30°
• Default: 1° for Analog thrusters, 3° for on/off thrusters
Thruster assist
Determines how the thrusters are used by the autopilot.
When set to ON, the thrusters will automatically be used by the autopilot system if the vessel
speed is below inhibited limit. If the vessel speed is above inhibited thruster speed the
thrusters will be turned off , but will automatically be turned on again when the speed gets
below the inhibited limit.
 Note:
Thruster inhibit speed is set during installation and is the max vessel speed for which
the thruster is allowed to run.
When set to OFF, thruster has to be manually enabled.
• Range: ON/OFF
• Default: OFF
Push boat to
Allows the user to specify if the trusters should be used to push the vessel to one side only.
If no option is selected the thrusters will be used for both port and starboard course
deviations.
• Range: ON/OFF for Port and Starboard
• Default: OFF
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