Definition

Noun: A sliding keel is a type of retractable fin keel used on sailboats. Its primary function is to prevent the boat from drifting sideways (drifting to leeward) due to the force of the wind.

Usage

The term "sliding keel" is used specifically in the context of sailing and boat design. It refers to a movable centerboard or daggerboard that can be raised or lowered through a slot in the hull. * The sailor lowered the sliding keel to improve the boat's stability against the strong crosswind. * For sailing in shallow waters, raising the sliding keel is essential to avoid running aground.

Advanced Usage

• Technical Context: In naval architecture, a sliding keel is a form of lateral resistance plane. Unlike a fixed keel, it allows for variable draft, making the vessel more versatile for different sailing conditions and depths.

Variants and Related Words

• Centerboard (noun): A common type of sliding keel, typically a pivoting fin housed in a case (centerboard trunk) within the hull.
• Daggerboard (noun): Another type of sliding keel that is raised and lowered vertically, not on a pivot, often found on smaller sailboats and dinghies.
• Retractable Keel (noun): A broader term that encompasses sliding keels, centerboards, and daggerboards.

Synonyms

• Centerboard
• Daggerboard
• Retractable fin
• Drop keel

Related Phrases

• To lower the keel: To deploy the sliding keel into the water.
• To raise the keel: To retract the sliding keel into the hull.

Noun

1. a retractable fin keel used on sailboats to prevent drifting to leeward