In sailing, wash refers to the turbulent water, waves, and disturbance created behind a boat as it moves through the water, often used interchangeably with "wake". It specifically refers to the churning water created by the propeller at the stern, which can damage shorelines and endanger smaller vessels.

Key Aspects of Wash:
Safety Hazard: Strong wash can create a dangerous current for swimmers, kayaks, and small boats.

"No Wash" Zones: Boaters are often required to reduce speed to minimize the impact of their wake and wash, particularly in narrow or crowded waterways.

"Awash": A related term describing a deck or rock that is so low in the water that it is constantly covered by waves.

Maintenance: "Wash down" refers to rinsing the boat with fresh water to remove salt and dirt after use.