SEA TRIALS
Initial sea trials should be carried out in
calm conditions with plenty of sea room.
The previously conducted functional test
will have verified that the autopilot is
operating correctly and that you are
familiar with all of its controls.
During first sea trials, the vessel will be
constantly changing heading, and it is,
therefore, very important to maintain a
constant look-out.
The following initial trial procedure is
recommended:-
* Steer on to the desired heading and
hold the course steady..
l
Engage the drive by rotating the clutch
lever fully clockwise to its end stops
(Fig. 21).
Press
Auto
to lock on to the current
heading. In calm sea conditions a
perfectly constant heading will be
maintained.
Alter course to port or starboard in
multiple increments of 1 and 10
degrees.
Power Steering
l
Press
Stand by
and practice power
steering using-the four course control
keys.
30” TO STBD
l
Press
Auto
twice (within 2 seconds) to
return to the original automatic
.
heading.
Hand Steering
l
Press
Stand by
and rotate the clutch
lever fully anticlockwise for return to
Automatic Sea State Control
During the sea trial, the operation of the
automatic sea state control can be
observed. When the autopilot is initially
.
.
TO PORT
engaged in
Auto
mode the
will
respond to all pitch and roll movements.
During the first minute of operation, it will
be noticed that repetitive movements of
the vessel are gradually neglected until
finally the autopilot will respond only to
true variations in course.
To ensure accurate course adjustment
the sea state control is automatically reset
whenever a
degree course change is
executed.
Sea State Inhibit
Where maximum course keeping
accuracy is required the automatic sea
state control may be inhibited by pressing
1 and + 1 keys together once.
Autopilot
and therefore power
consumption will be increased but course
keeping accuracy will be maximised.
The automatic sea state control is
restored by pressing the 1 and + 1 keys
together.
Note
Engaging the autopilot (pushing
Auto)
or engaging the
(both
red keys together) will always restore the
automatic sea state control.
16
Summary of Contents for Autohelm 4000
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