Planing is a high-speed sailing mode where a boat’s hull rises and glides on top of the water, rather than pushing through it, supported by hydrodynamic lift rather than buoyancy. This reduces drag, allowing speeds higher than traditional hull speed, typically characterized by a flatter, faster, and more efficient, lighter ride.

Key Aspects of Planing:
Hydrodynamic Lift: Instead of displacing water, the hull uses speed to create "lift" (similar to a wing) which supports the boat’s weight.

Reduced Drag: As the bow rises and the stern stops sinking into its own wake, less surface area contacts the water, dramatically reducing frictional resistance.

Hull Design: Usually achieved by boats with flatter aft sections or specific multihull designs (like catamarans).

Performance: The boat feels lighter, acceleration is noticeable, and the wake flattens out.

Common Misconceptions:
Planing is not an "all or nothing" state; it exists on a spectrum from partially planing (or "semi-planing") to full planing. It is not simply "going fast." It requires enough power or wind to create enough lift to overcome the bow wave.