MJM Yachts LLC 40z, Руководство пользователя

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Chapter 4, Instruments and Controls, MJM 40z Owner’s Guide page 15
RPM on the tachometer, you can compare it to SOG to determine the effect of
wind and current.
4.5 C
OMPASS
H
EADING AND
C
ALIBRATION
The yacht is equipped with three devices that display bearing:
1. The
RITCHIE COMPASS
on the dash
2. The
AUTOPILOT DIGITAL COMPASS
3. The
GPS COG
(Course Over Ground) on the MFD
When you are underway, these three sources should agree within a degree
or so. If they don’t, employ a professional compass adjuster. The
DIGITAL
COMPASS SENSOR
is located on a stringer outboard to starboard under the
cabin sole. Open the cabin sole hatch and look aft to access it.
Don’t store ferrous items such as tools in the locker near the
DIGITAL COMPASS SENSOR or on the dash by the RITCHIE COMPASS.
4.6 T
RIM
T
ABS
BREAKER PANEL
settings: Turn
TRIM TAB
breaker on.
The series of lights arching on either side of the LectroTab panel indicates how
much the trim tab is angled down at the stern. If you press
PORT BOW DOWN
,
lights will cascade around the port panel perimeter as you hold the switch down
to lower the port bow. What’s happening under the boat is that the starboard tab
tilts down, that lifts the starboard stern and lowers the port bow.
Trim tabs are unnecessary at low and high speeds other than for wind
compensation. At speeds over 8 knots, trim tabs allow you to trim the boat from
side to side to compensate for crew location, gear placement, or to counteract
wind pressure (the boat leans into a breeze). They are useful in lowering the bow
for better visibility or for powering into waves without pounding.
Don’t hesitate to apply maximum tabs in the 15-22 knot range. At higher speeds
in smooth water, when the boat naturally runs flatter, or when running down sea
into the back of waves, raise the bow for dry running and good control.
The 40z with IPS drives has large 36”x12” trim tabs on each side of
the transom to make it possible to lower the bow going into larger seas in the
10-20 knot range.
Applying trim tabs unevenly at speeds over 20 knots under certain conditions
could cause the boat to heel excessively.
4.7 S
EARCHLIGHT
BREAKER PANEL
settings:
SEARCHLIGHT
breaker on. Turn on the light by
depressing the on/off button.
The SEARCHLIGHT is a powerful LED appliance that may be operated with a
joystick from the helm. The LEDs draw less power (only 2.8 amps at 13.8V) than
previous incandescent devices.
With the joystick on the dash control, rotate your light to the desired location.
The speed of the light rotation can be controlled by depressing the fast/slow
button once and by depressing it again to restore the original speed. The hard-
wired dash control will be backlit when the bulb is illuminated.
Modern marine navigation electronics are
subjects beyond the scope of this guide.
Extensive manuals are in the binders.
The Lighthouse Operating Instructions
are also available on the
RAYMARINE
MFD
. You may also download it at:
https://raymarine.app.box.com/s/rb0rjilw
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if you aren’t familiar with navigation,
please learn. Electronic equipment can
fail. Have paper chart back-ups and
learn dead-reckoning skills.
…R.I.J.
TRIM TAB CONTROL panel
SEARCHLIGHT CONTROL