Monterey Sport Cruiser 260SCR, Руководство пользователя

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Section 7
7-6
Cruiser
Rotational thrust of the propeller is an aspect
most propeller-driven boats share and needs to
be compensated for at slow speeds. During
rotational thrust, torque is transmitted to the helm
and may cause your boat to drift either port or
starboard when moving forward at a slow speed.
Rotational thrust usually goes unnoticed at high
speeds. While moving forward at a slow speed,
constant helm corrections are usually necessary
to maintain a straight course.
Twin-engine boats usually compensate for
rotational thrust of the propellers by using one
counterrotating drive with a counterrotating
propeller, and one standard clockwise-rotating
drive and propeller to reduce the effects of
steering torque at all boat speeds.
Figure 7-5
Figure 7-6
Twin-Engine Steering
When maneuvering with twin engines at low
speeds, steer using the independent thrust of the
port and starboard drives in conjunction with helm
movements. Steering in this manner can be very
effective, especially when maneuvering in
restricted areas and when docking.
Practice using the throttles to control steering of
your boat. Practice these maneuvers in open
water away from others before attempting them
near docks or other boats.
• Before attempting to make close turns at low
speed, always position the throttles in IDLE.
• Reverse the direction of the engine on the side
you want to turn. If you want to turn starboard,
for example, shift the starboard engine into
REVERSE. The forward speed of the port
engine, along with the reverse rotation of the
starboard engine, will pivot your boat into a
starboard turn.
• Use quick “bursts” of throttle to control your
boat. Keep in mind that once your boat starts to
move, momentum will carry it through.
Figure 7-6
Figure 7-7
A boat does not have brakes. Controlling your
boat to a stop and while stopped are important
skills that must be learned. Reverse thrust is
commonly used to slow and stop a boat. The
continued momentum of a boat will vary
according to the boat design, load and speed.
You must also consider and learn to compensate
for the effects of wind and current. Stopping in
wind or water currents is difficult and requires skill
to be able to anticipate and compensate for these
effects.
• To stop or slow forward motion, always
gradually return the throttle(s) to the slow IDLE
position, pause and shift into NEUTRAL, then
pause and shift into REVERSE.
WARNING!
Always gradually return the throttle(s) to the
slow IDLE position. Failure to do so can
cause loss of boat control, personal injury
or death, and engine propulsion system
damage.
• If your boat has been driven for a long period of
time at high speed, allow the engine a two- to
three-minute cool-down period at low idle in
NEUTRAL.
KC-0059-A
STARBOARD TURN
SLOWER PROP
PORT TURN
SLOWER PROP
KC-0028-A