Adjusting Your Digital Rudder
Angle Indicator (RAI)
The SP-70 & SP-80 also provide an
electronic Rudder Angle Indicator.
You can adjust the R.A.I. so that it accurately
reflects your rudder movements.
For this adjustment, you should have your
boat out on the water away from traffic lanes.
If you have power assisted steering, start with
your motor idling so that you can use your
power steering.
Press the Pilot Key to turn on the autopilot.
Briefly press the Sby/Off Key.
With the Autopilot in STANDBY, use manual
steering to move the steering gear from the
left mechanical limit to the right limit. Watch
the motor or rudder. Estimate in degrees the
size of the arc from left to right.
This must be done manually, as the autopilot
will not move the steering gear so far that the
steering strikes a mechanical limit. The
Autopilot sets these electronic limits during
the Set-up Routine to save wear on your
steering system.
Press the Green Key once and then press
the Flush Key twice. The display now shows
the total degrees of travel of your steering
system. Press the Red and Green Keys to
adjust the number until it is the same as your
estimation of the actual arc.
A short interval after you have completed
your adjustment, the Autopilot will return to its
previous display.
Offset
Many vessels always need the rudder
positioned to the right or left a small amount.
This slightly offset rudder position is needed
to correct for the turning effect of a single
propeller. To the driver, it feels that this
Offset Position is the straight-ahead position
or the 0-degree position.
To avoid confusion, the RAI can be calibrated
so that it will show zero degrees when the
vessel is travelling straight ahead, even if the
rudder is slightly offset.
While travelling straight ahead at cruising
speed with the Autopilot in P
OWER STEER,
press the Flush Key. Press the Red
and
Green Keys to adjust the RAI to show zero
degrees.
The Autopilot will return to its previous display
when you have finished.
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