Simrad NAC-D, Руководство по вводу в эксплуатацию

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A
B
A
The value is set too high. Steering becomes unstable and
often the overshoot will increase
B
The value is set too low. It will take a long time to
compensate for a heading error, and the autopilot will fail to
keep a steady course
Counter rudder
Counter rudder is the amount of counteracting (opposite) rudder
applied to stop the turn at the end of a major course change. The
settings depend on vessel’s characteristics, inertia, hull shape and
rudder efficiency.
• If the vessel has good dynamic stability, a relatively small value
will be sufficient
• An unstable vessel will require high value
• The greater the vessel’s inertia, the greater value will be required
Increasing counter rudder value may result in some higher rudder
activity also when steering a straight course, particularly in high
waves.
The best way of checking the value of the Counter rudder setting is
when making turns. The figures illustrate the effects of various
Counter Rudder settings.
A B C
Sea trial | NAC™ -D Commissioning manual
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