_.--..--.~
-
- -
--
Auto-Tack Function
The following addilional trial is
recommended:
Steer onto a constant heading
approximately loo free of close
hauled
Press Auto to lock onto the current
heading or bolh red keys lo lock
OnlO
Ihe apparenl wind if a vane is filled.
l
Decrease the apparenl wind angle
(using the
+l
key if on the slarboard
lack)
unlil
the yachi is sailing close
hauled al oplimum penetration.
l
Prepare to lack and then press Ihe + 1
and
+lO
keys together (if on the
starboard lack) to initiate a lack
I
O
slarboard.
l
The yacht will complele a 100° course
change
IO
bring it onto Ihe opposite
lack.
WINI)
v
1
v
.
On compleling lhe lack and having
sheeted and retrimmed Ihe sails, the
vessel may be brought onlo the desired
apparent wind angle by fine adjuslmenls
lo Ihe course using Ihe
+ll-lo
keys. No
adjuslmenls should be made within 1
minute of compleling the lack lo allow the
Autopilot lo compensale for the helm trim
on Ihe new lack.
Disengagement
The pushrod is held
inlo
engagement
wilh the
lilter
pin by Ihe
weigh1
of
the
aclualor unit. This melhod of
engagement is secure and has been
adopted for safely reasons lo allow Ihe
*
pushrod lo be easily disengaged when
manual override becomes necessary.
w
OFF-COURSE ALARM
When the autopilot is set lo either Auto or
Vane mode a built in off-course alarm is
aulomatically sel up. The off-course
alarm will sound when the vessel
deviales for any reason from the original
course by more than 15 degrees for over
10 seconds. II is denoled by a continuous
series of bleep lones.
The alarm will be silenced if the vessel
returns to within 15 degrees of the
original course.
In Auto, if the vessel does not return
within these limils the alarm can only be
silenced by selecting Standby.
In Vane, the alarm will sound when the
wind direction changes by more lhan 15
degrees and may be accepted by
pressing bolh red keys together. This will
silence the alarm and advance Ihe off
course alarm datum to
the
current
compass heading.
CURRENT LIMITING AND
.
CUTOUT
If the autopilot is driven into its end stops,
Ihe drive will be pulsed lo prevent
.
overloading Ihe motor. If the
pilol
is left in
this condition for 30 seconds the
microprocessor will aulomalically cut
out
power to the motor and sound the alarm
continuously.
To restore the autopilot for normal
operation the standby key must be
pressed lo put Ihe unit in standby
operating mode.
Rudder Control Adjustment
The rudder conlrol setting
recommended on page 21 will provide
slable control for
inilial
sea trials.
However, sailing
crafl
can vary widely in
their response lo
the
helm and further
adjustment of Ihe rudder control setting
may improve Ihe Autohelms steering
characteristics.
An excessively high rudder control
selling results in oversteer which can be
recognised by Ihe vessel swinging slowly
lrom side lo side of Ihe aulomalic
heading accompanied by excessive
rudder movemenl. In addition,
distincl
overshool will be observed when Ihe
course is changed. This condition can be
corrected by reducing the rudder control
selling (rolaling rudder control
anti-
clockwise).
Similarly, an insufficient rudder control
selling results in understeer which gives
sluggish sleering performance and is
particularly apparent when changing
course. This is corrected by increasing
Ihe rudder control selling (rotating
rudder control clockwise). These
lendencies are most easily recognised in
calm sea condilions where wave aclion
does not mask basic sleering
performance. The rudder control setting
is
nol
over critical and should be sel lo
Ihe lowest selling consislenl with
accurate course keeping. This will
minimise actuator movements and hence
reduce power consumplion.
25
it
To Next Page
Loading...
Need help?
General
