What is the correct way to adjust the trim while underway?

Adjusting the trim while underway is an important aspect of optimizing a boat's performance and ensuring a smooth ride. The correct way to do this is by using the trim controls to alter the angle of the drive unit. By adjusting the trim electronically or manually while the boat is in motion, a boater can effectively influence the boat's ride and handling characteristics.

When the trim is adjusted up (nose higher), it can reduce drag and improve fuel efficiency, especially in planing boats. Conversely, trimming down (nose lower) can help improve stability and the boat's ability to cut through the water. This adjustment should be done dynamically, as conditions change due to waves, boat speed, and weight distribution.

Other methods, such as stopping the engine, adjusting throttle, or shifting passenger weight, do not directly provide the same immediate effect on trim and the boat's performance efficiency while underway. Stopping the engine negates any forward motion and removes the need for trim adjustments, changing throttle position affects speed but not the angle of the drive unit, and shifting passengers may not sufficiently or efficiently address trim issues as it depends on the weight distribution rather than the drive angle itself.