What is another word for sliding keel?
Pronunciation: [slˈa͡ɪdɪŋ kˈiːl] (IPA) 
The term "sliding keel" refers to a type of keel that can be adjusted to different positions in order to optimize a sailboat's performance in varying water conditions. Some synonyms for this nautical term include "swing keel," "centreboard," "daggerboard," and "lifting keel." Each of these terms describes a variation of the sliding keel that operates in a slightly different manner. A swing keel pivots on a horizontal axis, while a centreboard is a vertical board that can be raised or lowered through a slot in the boat's hull. A daggerboard is a similar type of keel that slides vertically, while a lifting keel can be retracted completely into the boat to allow for shallow water sailing.
