Regal 3300 Owner's Manual page 149

Operation In "Bow Up" Position
DN UP
TRIM
rapidly, creating a hazardous condition.
Operation In "Bow Down" Position
DN UP
TRIM
waves, the bow of the boat will plow into the water.
Operation In "Level" Position
DN UP
TRIM
conditions. Be prepared to make trim changes as needed.
https://www.boat-manuals.com/
The "Bow Up" or out position is normally used
for cruising, running with a choppy wave condition,
or running at full speed. Excessive "bow up" trim
will cause propeller ventilation resulting in propeller
slippage. Use caution when operating in rough
water or crossing another boat's wake. Excessive
"bow up" trim may result in the boat's bow rising
The "Bow Down" or in position is normally used
for acceleration onto a plane, operating at slow
planning speeds, and running against a choppy wave
condition. It is also used when pulling water skiers,
tubers, kneeboarders, etc. In this position the boats'
bow will want to go deeper into the water. If the
boat is operated at high speed and/or against high
In normal running conditions, distribute passengers
and gear so boat is level. At or below cruising
speeds, trim the vessel for optimum performance.
The trim gauge will show somewhere in the center
of the gauge. This position will also enhance
running visibility and overall stability. Again, each
outing provides different wave, load and running
Vessel Operation
5-19