Tiara Yachts C49, Owner'S Manual

Page: 33 / 152

Helm Systems Section 2
2-5
43 LS
43 LS
When running at a speed that will result in the
boat falling off plane, lower the tabs slightly,
bow down, to improve the running angle and
operating efficiency. Lowering tabs too far
can reduce operating efficiency and cause
difficult steering and handling.
When running at high speeds, make sure the
tabs are in the full UP position. Use only the
necessary trim plane action to compensate
for any listing. Trim tabs are more sensitive
at higher speeds. Adjust for this and be pre -
pared to slow down if difficulties arise.
Be extremely careful when operating in a fol-
lowing sea. The effect of trim tabs is amplified
under these conditions. Difficulty in steering
and handling can result from improper trim
tab usage, especially in a following sea; using
the switches, raise the tabs to the full bow UP
position.
When running into a chop, a slight bow-down
attitude will improve the ride. Be careful not
to over trim; difficulty in handling can result.
Trim Tab Indicator
The trim tab switches are labeled to indi-
cate the reaction of the bow of the boat. The
L.E.D. lights indicate the position of the trim
tabs. When adjusting the starboard bow up or
down, the L.E.D. lights on the right side of the
panel will activate, indicating the movement
of the port tab. Refer to the trim tab operation
manual.
Trim Tab Maintenance
Marine growth can affect the operation of the
trim tab planes and actuators. To help reduce
marine growth, return the trim tabs to the full
UP position after operating the boat. Inspect
and clean the actuators and planes regularly.
The trim tabs also include a zinc anode to
help prevent galvanic corrosion. Galvanic
corrosion occurs when different metals are
submerged in an electrolyte. Sea water is
an electrolyte and submerged metal compo-
nents must be protected. Anodes were fac -
tory installed and need to be replaced when
they are 75% of their original size.
Refer to the sacrificial anodes information
in section 11, Routine Maintenance, and the
trim tab owner’s manual for additional main-
tenance information and fluid specifications.
2.11 Compass
The compass is located at the helm. To adjust
the compass, read the instructions on ‘Com-
pass Compensation’ provided with this man-
ual. The compass cannot be adjusted accu-
rately at the factory; it must be compensated
for the influence of the electrical equipment
and electronics unique to your boat. The com-
pass should be adjusted by a professional
after all electronics and additional electrical
accessories are installed and before operat-
ing the boat.
2.12 Bow Thruster
The bow thruster is electrically driven and
controlled by a joystick on the helm.
Bow thruster control
Operate in short bursts of a few seconds to
preserve battery life. Refer to the bow thruster
owner’s manual for more operation and main-
tenance information.
For service access to the bow thruster motor,
remove the berth mattress and open the
berth access panel.
The bow thruster battery switch is located in
the mechanical space, near the batteries on
the battery shelf.