A ropax ferry is a ship that combines the features of a cruise ship and night cabins with a roll-on/roll-off ferry. They are also known as RoPax for their combined Roll on/Roll Off and passenger design. ROPAX FERRIES are conventional ferries with a large garage intake and a relatively large passenger capacity, with conventional diesel propulsion and a sailing speed of over 25 knots (46 km/h; 29 mph). Cabins, if existent, are normally smaller than those on cruise ships. The hull of a ROPAX Ferry is normally subdivided into several (10+) watertight compartments by automatic watertight doors. While at sea, the bow visor and ramp are locked closed by hydraulically operated cleats, where watertight seals are formed by the compression of heavy rubber gaskets. Watertight integrity is monitored continuously by the Bridge.