Hamilton Jet HJ241, Manual

Page: 26 / 202

2.4
2 SYSTEM OPERATION
2.4 M
ANOEUVERING AND
D
OCKING
HJ-241 / HSRX
2.4 MANOEUVERING AND
DOCKING
2.4.1 Low Speed Manoeuvering
and Docking
T
HE VESSEL IS BEST MANOEUVRED AS FOLLOWS
:-
1. Move the Reverse Control Lever to the "Zero
Speed" position.
2. Set the throttle to 1/3 open - approximately
1,200 R.P.M. (In strong tide or wind conditions,
increase the throttle opening to obtain greater
response as required to suit the conditions).
3. A slight movement either way from the "Zero
Speed" position will be sufficient to move the
vessel ahead or astern until the manoeuvre is
complete.
4. Steering will be very responsive at this throttle
opening. Full steering control is available at all
ahead/astern control lever positions and there is
no change of steering "sense" at any time.
5. Manoeuvre at a fixed throttle opening, working
the steering with one hand and the Ahead/Astern
Control Lever with the other hand.
NOTE:
1. DO NOT WORK THE THROTTLES - Leave
as set. With TWIN JETS manoeuvering is
best carried out using the Helm with one
hand and both Reverse Levers with the other
hand. ONE AHEAD and ONE ASTERN is
NOT AS EFFECTIVE.
2. USE ONLY LOW ENGINE RPM - high RPM
will give faster response but makes control
more difficult.
3. If the bow is rotating to starboard, port lock
must be used to stop the rotation (or vice
versa) then the Helm centred to hold the
heading.
4. If the vessel is moving ahead then the
Reverse Lever(s) must be moved astern to
bring the vessel to rest (or vice versa) and
then Zero Speed selected to hold position.
2.4.2 Moving Sideways
WITH TWIN JETS:— Use the following procedure to
move the vessel sideways away from the jetty.
Initially both controls are at "ZERO SPEED" and the
vessel is stationary.
M
OVING TO
P
ORT
.
1. Set both engine RPMs to just above idle with
slightly higher RPM on the port side.
2. Set steering to ahead.
3. Move the port reverse lever to full astern and the
starboard lever to full ahead. (A)
4. As the bow begins to swing to Port, turn the helm
to starboard to keep the vessel parallel to the
jetty. (B)
5. The vessel will now move sideways to Port.
6. Adjust the port engine rpm to prevent fore and aft
movement. (Higher RPM moves vessel aft). This
may also be done by bringing the starboard
reverse control back towards the Zero Speed
position.
Figure 4: Moving to Port
JETTY
A.