form stability

The hull should plane easily and give moderate form stability.

A high ballast ratio and plenty of form stability make the J/44 very stiff in a breeze.

Bolger reasoned that a simple rockered bottom and vertical sides gives the most volume, and form stability, on a given beam.

Although both the Folkboat and the Contessa 25 had relatively narrow long keel hulls, Sadler's new design utilised a wider hull to give more form stability and the (then) new finkeel together with a skeg-mounted rudder.