What is another word for drop keel?
Pronunciation: [dɹˈɒp kˈiːl] (IPA) 
The term "drop keel" refers to a movable keel that can be lowered or raised on a boat or ship. This feature is useful for navigating shallow waters and avoiding potential damage to the vessel. There are several synonyms for the term "drop keel," including retractable keel, swing keel, centerboard, and daggerboard. Retractable keels can be lifted completely out of the water, while swing keels and centerboards pivot up and down. Daggerboards are similar to centerboards, but they are fixed in position and can be moved laterally to improve stability. Regardless of which term is used, a drop keel is an essential feature on many boats and ships, particularly those used in shallow or coastal waters.
