The difficulties of differentiation can be made clear by comparing several fishing vessels. While a catboat such as the Brek Marshall may undoubtedly be classified as a boat despite a small foredeck, this is more difficult for a vessel such as the Catarina. With a length of 16 meters, it can still be classified as a boat. She does have a cockpit, but in fact she is considered to be covered. It is also not designed to be rowed with a crew of maximum three people. Another source defines that small sailboats are called "boat", but larger sailboats, which usually require a hired crew to operate, are called "sailing ship".