Volvo Penta D4 Operator's Manual page 26

Instruments and Controls
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Power Trim Assistant
The Power Trim Assistant, PTA, adjusts the trim angel
automatically according to engine speed (rpm). It is
possible to set five trim angles at five different engine
speeds, idle speed included. To set the angles, please
refer to Settings Menu page 102 section PTA.
Power Trim Assistant is activated and turned off in the
EVC menu.
1 Turn to PTA in the settings menu.
2 Push the knob to activate or turn off the function.
If the function is activated it can be choosen from
the main menu, please refer to Settings
Menu page 102 section My view.
Maneuvering
The correct trim setting provides the best comfort when
driving.
Every boat has its own unique characteristics and
reacts differently to how you trim it. We can therefore
only give general advice about how you reach the best
trim angle for your boat. It can generally be said that
when the boat feels well balanced, is easy to steer and
comfortable to drive - than you have found the optimum
trim angle.
Make a few trips at low speed to experience the effect
of Power Trim and the different trim ranges, to see
what effect they have on the boat. Note how long it
takes for the boat to reach planing speed. Check the
tachometer, speed and the response of the boat.
Trim the drive down
The bows are pressed down and the boat accelerates
faster. It also provides better driving and steering
response at speeds below the planing threshold.
Driving with "bow down"
The "bow down" position is normally used during accel-
eration up to planing speed, at low planing speeds or
with a short sea. With full "bow down", the boat has a
tendency to self-steer. You may have to compensate
with the wheel to keep the boat on the right course. In
this position, the bow of the boat tries to go deeper in
the water. If the boat is driven at high speed or towards
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