Blackfin 272 - Page 48

4848
H elm C ontrol S y stem s
Always establish the intended heading and cruise
speed before attempting to adjust the hull attitude
with the trim tabs. After stabilizing speed and
direction, move the trim tabs to achieve a level
side to side running attitude being careful not to
over trim.
After depressing a trim tab switch, always wait a
few seconds for the change in the trim plane to
take eect. Avoid depressing the switch while
awaiting the trim plane reaction. By the time the
eect is noticeable the trim tab plane will have
moved too far and thus the boat will be in an
overcompensated position.
When running at a speed that will result in the
boat falling o plane, lowering the tabs slightly,
bow down, will improve the running angle and
operating eciency. Too much bow down tabs can
reduce operating eciency and cause substantial
steering and handling diculties.
Be extremely careful when operating in a following
sea. The eect of trim tabs is amplied under such
conditions. Steering and handling diculties can
result from improper trim tab usage, particularly
in a following sea. Always raise the tabs to the
full bow up position in these conditions.
When running at high speeds be sure that the
tabs are in the full “UP” position. Only enough
trim plane action should be used to compensate
for any listing. Trim tabs are extremely sensitive
at high speeds. Adjust for this and be prepared
to slow down if diculties arise.
When running into a chop, a slight bow down at-
titude will improve the ride. Be careful not to over
trim. Handling diculties may result.