A Passenger Ferry can exist in many different variants. However they do share one thing, they are designed to carry passengers. These ships could found as small Ferries crossing a channel, river or a lake or as large Seagoing Ferries crossing the open seas between countries or different destinations. Propulsion of Passenger Ferries could from gas turbine, diesel or Electrical engines and they can be equipped with either conventional propellers or water-jet units. Design speed is from 6 up to 40+ knots. Passenger Ferries can also be found as single hull, multi-hull (i.e. catamaran) hydrofoil and hovercraft design.