A MOB, short for man overboard boat, is a small, fast rescue boat which large vessels, especially passenger ferries and cruise ships, use for man overboard situations. MOBs use diesel or gasoline-powered engines and are constructed of highly buoyant materials making them nearly unsinkable. Design MOBs are constructed from fire-retardant polyester fibreglass resin. Due to the inherent buoyancy of the materials, the vessel is nearly unsinkable. Each boat seats five people with room for a sixth lying down on the floor. The MOBs can be powered by diesel outboard motors up to or gasoline engines of . The MOB is usually davit-launched. Regulations According to International Maritime Organization regulations, passenger ships that are less than require one Rescue boat and those that are larger need to carry at least one rescue boat on each side of the ship. Roll-on/roll-off passenger ships require one Fast Rescue Craft (FRC) to be at least in length and capable of . Cargo ships need to carry one rescue boat. Citations External links Fast rescue craft English inventions Lifeboats Ship's boats