Autotack - Raymarine Autohelm 4000 User Manual

SYSTEM
Performance under windvane has been
improved by the introduction of Wind
Trim.
With Wind Trim the computer uses the
reference. However, as changes occur in
the apparent wind angle the computer
automatically adjusts the compass
heading to maintain the original apparent
wind angle.
STAND BY
AUTO
This system eliminates the effects of
turbulence or short term wind variations
and provides smooth precise performance
under windvane with minimum current
consumption.
When a windvane system is fitted, a
new layer of control functions is
automatically opened as follows:-
Push both red keys together once
to engage the windvane and
maintain the current apparent wind
angle.
or
Push both red keys together twice
to return the previous apparent
wind angle.
Push once to alter the vessel's
heading relative to the apparent
wind in increments of 1 or 10
degrees.
Note + keys always turn the vessel
to starboard.
Push once to disengage the
previous apparent wind angle will
be memorised).
or
Push once to change over to
automatic compass heading control
and maintain the current heading.
FUNCTION
The Autohelm 4000 has an automatic
tacking function which operates in both
compass and windvane mode as follows:-
The Auto Tack function operates by
selecting a pre-set course change
(1 OO") to bring the vesselbnto the
During the tack, the Off Course
Alarm may sound. This indicates the
autopilot is adjusting trim to acquire
the new course.
On completing the tack and
Push - 1 and - 10 keys together
once to initiate a tack to port.
Push + 1 and + IO keys together
once to initiate a tack to starboard.
having sheeted and retrimmed the
sails, the vessel may be brought
onto the desired apparent wind
angle by fine adjustments to the
course using the + I- 1 o keys. No
adjustments should be made within
1 minute of completing the tack to
allow the Autopilot to compensate
tack.
for the helm trim on the new
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