Decreasing the camber allows the boat to point higher until there is no longer enough force forward force on the sail for the boat to move. Camber is the curvature of a horizontal slice of the sail. The line of maximum camber, shown in figure 3, is the line formed by the points of maximum camber of the horizontal slices of the sail. Moving this forward moves the center of effort forward. The line of maximum camber.
Twist refers to the curved line made by the leech of the sail.
This is shown in figure 4. More twist reduces the force on the upper part of the sail. Twist is the curvature of the leech. To locate the following, refer to figures 5 and 6. While sailing, the painter is led into the cockpit and stowed in one of the compartments along the side of the boat.