mjm yachts 50z Downeast, Руководство пользователя

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4.1
4.2
STEERING CONTROL SYSTEM
STEERING SYSTEM
The 50z has an integrated, electronically controlled power steering system which through electric
motors rotate the two outer (not middle) IPS pod drives. When running, the 50z is steered as w
outboards or sterndrives. Thrust of the propellers is directed more immediately and precisely from
side to side through a 26° arc to steer the boat.... rather than bouncing the prop wash from a
conventional straight shaft propulsion unit off a rudder.
When the throttle/shift levers are put in (N) neutral and a button pushed to activate the IPS
joystick: Control of the pod drives is transferred from the throttle/shift and wheel to IPS computer
controlled joystick. When the joystick is activated, the steering wheel locks and no longer
functions. Do not try to force it or damage may occur.
Emergency Alignment If a fault occurs which prevents one or both of the propulsion units from
being operated with the steering wheel, it is possible to align the faulty propulsion unit(s) so that
its aimed straight ahead (and won’t act like a rudder), so as not to impair operation of either the
remaining propulsion unit or the steering of the boat with the two engines. See the VPOM.
Emergency Steering These controls are attached to the engine with cables, so if the electronic
steering ever failed on both propulsion units, a steering method using the two engines can be
employed. This is outlined on pages 60-61 of the VPOM.
IPS JOYSTICK DOCKING CONTROL
This control is used ONLY for docking and
maneuvering at slow speed.
Ignore the upper right hand
button which is for a Garmin autopilot interface . Learn to
handle the joystick in a safe and correct manner
before you start using the function in tight
quarters. When the joystick is active, the normal engine
controls are Neutral and inactive. A computer operates the
drives and shifting. Rotation of the wheel is frozen and it
should not be turned, as damage may occur.
To Activate : Both outer engines must be running (the
center engine does not need to be on as it doesn’t
participate in the IPS or DPS function. The engine control
handles must be IN NEUTRAL. Press “DOCKING” button.
A beep confirms it is active.
To
Deactivate : Either m ove the engine
controls OUT OF NEUTRAL (forward or
reverse) or press “DOCKING” button again. A
double beep will confirm that it is OFF.
Boost Function In windy weather or current when you need more oomph, push the lower right
“HIGH MODE” button after having first activated the “Docking” button. A beep will confirm it’s
engaged. Deactivate by pushing the button again. You’ll hear a double-beep confirmation.
DPS - “DYNAMIC POSITIONING SYSTEM” Holds the boat on it’s heading and GPS position, it is
activated by pushing the upper left button and deactivated by pushing it again, or simply engaging
the engine controls. You will find this works better if utilizing the optional Seakeeper Gyro as boat
motion is stabilized in waves, meaning the DPS doesn’t have to compensate for excess boat motion.
Maneuvering with Joystick Follow the arrows. Slowly lean the joystick in the direction you’d like
to go. Release and the thrust stops. The boat may keep moving, so you may have to tap it in the
opposite direction to stop it. The top of the joystick is rotated to orient the bow and stern, or to
CHAPTER 4