What is another word for centerboard?
Pronunciation: [sˈɛntəbˌɔːd] (IPA) 
Centerboard, a retractable keel present in most sailboats, is also known by several other names. It is commonly referred to as a "daggerboard" in small boats such as dinghies and day sailors. In larger boats, it is known as a "drop keel" or "swing keel." A centerboard can also be called a "sliding keel" when it moves up and down in a slot in the hull. The term "lifting keel" is also commonly used when a centerboard is designed to retract partially or fully into the hull. Whatever the name, the purpose of a centerboard remains the same: it provides extra stability to the boat when sailing upwind.
