Chine

A chine is the line, edge, or curved transition where a boat’s bottom panels meet its sides. On a hard-chined hull this junction is sharp and defined; on a soft-chined or round-bilge hull it is more gradual. Chines are a key feature of hull shape and influence how water flows around the vessel.

For boaters, chine design affects stability, spray control, turning behaviour, and ride comfort. A hard chine can increase form stability and help a Powerboat lift onto the Running Surface when Planing, while softer chines often give a gentler motion in confused water. Understanding your chine shape helps set realistic expectations for speed, heel, slamming, and handling in different conditions.

Chine behaviour is worth considering when interpreting wave forecasts and choosing a safe route. PredictWind Weather Routing, Wave Maps, and boat performance data can help match your hull’s likely comfort and speed to the expected sea state, especially for fast motorboats, trailer boats, and modern hard-chined cruising yachts.