Monday, May 28, 2007

Jet boat

A jet boat is a boat propel by a jet of water twisted out from the back of the craft. Unlike a powerboat or motorboat that uses a propeller in the water behind the boat; a jet boat draws the water from under the boat into a pump-jet inside the boat, and then expels it through a needle at the stern.
Jet boats were originally designed by Sir William Hamilton (who invented the water jet in 1954) for operation in the fast-flowing and shallow rivers of New Zealand, especially to overcome the problem of propellers striking rocks in such waters, although Italian inventor Second Camping had demonstrated a similar vessel as early as 1931 in Venice.
The difference between Campini's and Hamilton's inventions is that Campini's water jet had a very short lifetime in operation due to some unsolved material problems. Hamilton, unlike Camping, filed for a patent. Jet boats are extremely maneuverable, and many can, from full speed, be upturned and brought to a stop within their own length, in a maneuver known as a Hamilton turn.

Monday, May 21, 2007

Kerala houseboats

The houseboats in Kerala, south India, are huge, slow-moving, foreign barges used for leisure trips. They are a reworked model of Kettuvallams (in the Malayalam language, Kettu means "tied with ropes", and vallam means "boat"), which, in earlier times, were used to carry rice and spices from Kuttanad to the Kochi port. Kerala houseboats were measured a suitable means of transportation.
The fame of Kettuvalloms has returned in the function as major tourist attractions. Many come across the Kettuvallom an ideal means of explore the beauty of the Kerala backwaters.
Such a houseboat is about 60 to 70 feet (about 18 to 21 meters) long and concerning 15 feet (about 5 meters) wide at the middle. The hull is made of wooden planks that are detained together by ropes of coconut fiber; the usual wood is 'Anjili'. The roof is completed with bamboo poles and palm leaves. The exterior of the boat is tinted with protective coats of cashew nut oil.

Monday, May 14, 2007


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.