👉 In the context of maritime navigation, "keelless" refers to a type of vessel that has not been equipped with a keel. This means that the hull or keel is missing, and instead, it is made up of other structures such as masts, rudders, and sails. The keelless vessels are often used in rough waters or when there is a lack of suitable keels available for construction. Keelless ships have been an important feature of maritime history due