Seaworthiness is not one thing, Seaworthiness involves the shape of the bow, the bottom of the hull up forward and down aft near the transom, the shape of the shoulders behind the bow and a whole host of other factors which range from the inner strength of the hull (often referred as the structural integrity), and the shape, size and style of outboard well on the transom. (Marinews)

Many owners prefer to alter existing designs and incorporate new ideas and machinery that should be independently assessed to minimise teething problems. However, it is important to ensure that there is compliance to all safety and seaworthiness regulations. (KEILLOR ASSOCIATES)

In order to participate in Club races, all active sailors must submit a Seaworthiness Certificate, known as a Declaration of Compliance, each year, confirming that their boat conforms to the Yachting Victoria safety regulations. (Flinders Yacht Club)