Inflatable boat

An inflatable boat is a lightweight boat constructed with its sides and bow made of elastic tubes and a flexible flat floor. Often the transom is rigid allowing a location and structure to fasten an outboard motor onto, and this type of boasting balloon is sometimes called a "Zodiac boat". Often, inflatable boats are intended to be packed into in a small volume, so they can easily stored and transported to water when needed. This feature allows such boats to be used as life rafts for larger boats or aircraft, and for travel or recreational purposes.
Other conditions are "inflatable" and (an old term) "rubber dinghy".
The modern RIB (rigid-hulled inflatable boat) is a growth of the inflatable boat using a solid or section ally rigid floor and capable of taking a high powered transom mounted outboard engine appropriate for high speed operations well up into the ski boat speed ranges.

Hydroplane

A hydroplane (or hydro, or thunderbolt) is a very specific type of motorboat used completely for racing.
One of the unique things about these boats is that they only use the water they're on for propulsion and steering (not for flotation)—when going at full speed they are primarily detained aloft by a principle of fluid dynamics known as "planning", with only a tiny portion of their hull actually touching the water.
The basic hull design of most hydroplanes has remained comparatively unchanged since the 1950s: two sponsors in front, one on either side of the bow; behind the wide bow, is a narrower, mostly rectangular section housing the driver, engine, and steering equipment. The aft part of the vessel is supported, in the water, by the lower half of the propeller, which is intended to operate semi-submerged at all times. The goal is to stay as little of the boat in contact with the water as possible, as water is much denser than air, and so exerts more drag on the vehicle than air does. Basically the boat 'flies' over the surface of the water rather than actually traveling through it.

Ferry

A ferry is a form of transport, typically a boat or ship, but also other forms, carrying (or ferrying) passengers and sometimes their vehicles. Ferries are also used to transport shipment (in Lorries and sometimes empowered freight containers) and even railroad cars. Most ferries operate on regular, everyday, return services. A foot-passenger ferry with many stops, such as in Venice, is also known as waterbus or water taxi.
Ferries form a part of the public transport systems of many riverside cities, allow direct transit between points at a capital cost much lower than bridges or tunnels.
The busiest seaway in the world joined with Great Britain with the rest of Europe across the English Channel. Sailing mainly to french ports, such as Calais, Cherbourg-Osterville and Le Havre, ferries starting from the Great Britain also sail to Belgium, Denmark, The Netherlands, Norway and Spain. Some ferries carry mainly tourist traffic, but most also carry freight, and some are completely for the use of freight Lorries.
The great cruise ferries sail in the Baltic Sea between Finland, Sweden, Germany and Estonia and from Italy to Albania and Greece. In many ways, these ferries are like sail ships, but they can also carry hundreds of cars on car decks. In Britain, car-carrying ferries are sometimes referred to as RORO (roll-on, roll-off) for the effortlessness by which vehicles can board and leave.
In Australia, two Spirit of Tasmania ferries carry passenger and vehicles 300 kilometers across Bass Strait, which separate Tasmania from the Australian mainland. These run during the night but also contain day crossings in peak time. Both ferry are based in the northern Tasmanian port city of Devonport and sail to Melbourne, Victoria.