Correcting the paddle shaft angle not only helps you stay straight, but also reduces how often you switch hands. Ultimately it makes you more efficient and saves energy.
Short (9′) or boards with a lot of rocker may not respond to this technique. Boards 14′ or longer will allow you to paddle on one side for as long as you want depending on current or wind conditions.
Tip: Keep your hands loose on the paddle shaft. A ‘death grip’ will lead to pain in your wrists and arms and can take energy away from your stroke.