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Watercraft Components
A watercraft or waterborne vessel is any vehicle designed for travel across or through water bodies, such as a boat, ship, hovercraft, submersible or submarine. Types Historically, watercraft have been divided into two main categories. *Rafts, which gain their buoyancy from the fastening together of components that are each buoyant in their own right. Generally, a raft is a "flow through" structure, whose users would have difficulty keeping dry as it passes through waves. Consequently, apart from short journeys (such as a river crossing), their use is confined to warmer regions (roughly 40° N to 40° S). Outside this area, use of rafts at sea is impracticable due to the risks of exposure to the crew. *Boats and ships, which float by having the submergeable part of their structure exclude water with a waterproof surface, so creating a space that contains air, as well as cargo, passengers, crew, etc. In total, this structure weighs less than the water that would occupy the sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland Pudgy Safety Dinghy, Rowing
Portland most commonly refers to: *Portland, Oregon, the most populous city in the U.S. state of Oregon *Portland, Maine, the most populous city in the U.S. state of Maine *Isle of Portland, a tied island in the English Channel Portland may also refer to: Places Australia *Cape Portland, Tasmania *Portland, New South Wales, named after the first Australian cement works *Portland, Victoria **City of Portland (Victoria), a former local government area (LGA) Canada *Portland, Ontario *Portland, Newfoundland and Labrador *Port Lands or Portlands, Toronto, Ontario *Portland Estates, Nova Scotia *Portland Inlet, between southeastern Alaska and British Columbia **Portland Canal, an arm of Portland Inlet *Portland Island (British Columbia) United Kingdom *Isle of Portland, a tied island of Dorset, the origin of many uses of the name **Portland (ward), an electoral district **Portland Harbour **HM Prison Portland *Portland, Somerset, List of United Kingdom locations: Po-Poz#Por-Poy, a lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windsurfing
Windsurfing is a wind-propelled water sport that is a combination of sailing and surfing. It is also referred to as "sailboarding" and "boardsailing", and emerged in the late 1960s from the Californian aerospace and surf culture. Windsurfing gained a popular following across Europe and North America by the late 1970s and had achieved significant global popularity by the 1980s. Windsurfing became an Olympic sport in 1984. History Newman Darby of Pennsylvania created a rudderless "sailboard" in 1964 that incorporated a pivoting square rigged, "square rigged" or "kite rigged" sail which allowed the rider to steer a rectangular board by tilting the sail forward and back. Darby's design however had notable performance limitations. Unlike the modern windsurfer design, Darby's sailboard was operated "back winded", with the sailor's back to the lee side of a kite-shaped sail. This much less efficient and less desirable sailing position is opposite of how a modern windsurfer is operated. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaplane
A seaplane is a powered fixed-wing aircraft capable of takeoff, taking off and water landing, landing (alighting) on water.Gunston, "The Cambridge Aerospace Dictionary", 2009. Seaplanes are usually divided into two categories based on their technological characteristics: floatplanes and flying boats; the latter are generally far larger and can carry far more. Seaplanes that can also take off and land on airfields are in a subclass called amphibious aircraft, or amphibians. Seaplanes were sometimes called ''hydroplanes'', but currently this term applies instead to Hydroplane (boat), motor-powered watercraft that use the technique of Planing (boat), hydrodynamic lift to skim the surface of water when running at speed. The use of seaplanes gradually tapered off after World War II, partially because of the investments in airports during the war but mainly because landplanes were less constrained by weather conditions that could result in sea states being too high to operate seaplanes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibious ATV
An amphibious all-terrain vehicle, or amphibious ATV (or AATV), is a small, all-wheel drive, off-road, all-terrain amphibious vehicle, used for recreation, farm-, hunting, utility or industry tasks, by enthusiasts and professionals worldwide. They are legally off-highway vehicles in many countries, or at least restricted from use on Limited-access road, express highways and motorways – their use is generally extra-urban. Amphibious ATVs frequently use a lightweight body-tub with wide balloon tires and a simple drivetrain without any Car suspension, wheel suspension or steering – the only cushioning is provided by the soft tires, that also contribute to floatation in the water. Steering is through differential steering, also known as skid-steering. Models are frequently six-wheel drive, or eight-wheel drive on larger models. They were marketed from the early 1960s and quickly became popular, predominantly for recreation, in both the United States and Canada, originally called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibious Automobile
An amphibious automobile is an automobile that is a means of transport viable on land as well as on or under water. They are unarmored for civilian use. ATVs Amongst the smallest non air-cushioned amphibious vehicles are amphibious ATVs (all-terrain vehicles). These saw significant popularity in North America during the 1960s and early 1970s. Typically an amphibious ATV (AATV) is a small, lightweight, off-highway vehicle, constructed from an integral hard plastic or fibreglass bodytub, fitted with six (sometimes eight) driven wheels, with low pressure, balloon tires. With no suspension (other than what the tires offer) and no steering wheels, directional control is accomplished through skid-steering – just as on a tracked vehicle – either by braking the wheels on the side where you want to turn, or by applying more throttle to the wheels on the opposite side. Most contemporary designs use garden tractor type engines, that will provide roughly top speed on land. Const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibious Vehicle
An amphibious vehicle (or simply amphibian) is a vehicle that works both on land and on or under water. Amphibious vehicles include amphibious Amphibious cycle, bicycles, Amphibious ATV, ATVs, Amphibious automobile, cars, Duckboats, buses, trucks, Railroad car, railway vehicles, combat vehicles, and hovercraft. Classic landing craft are not amphibious vehicles as they do not work on land, although they are part of amphibious warfare. Ground effect vehicles, such as ''ekranoplans'', will likely crash on any but the flattest of landmasses so are also not considered to be amphibious vehicles. General technical notes Two main categories of amphibious vehicles are those that travel on an air cushion (Hovercraft) and those that do not. Among the latter, many extend the off-road capabilities of land vehicles to all kinds of terrain, including ice, snow, mud, marsh, swamp etc. This explains why many designs use Tracked vehicle, tracks in addition to or instead of wheels, and in som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diver Propulsion Vehicle
A diver propulsion vehicle (DPV), also known as an underwater propulsion vehicle, sea scooter, underwater scooter, or swimmer delivery vehicle (SDV) by armed forces, is an item of diving equipment used by scuba divers to increase range underwater. Range is restricted by the amount of breathing gas that can be carried, the rate at which that breathing gas is consumed, and the battery power of the DPV. Time limits imposed on the diver by decompression requirements may also limit safe range in practice. DPVs have recreational, scientific and military applications. DPVs include a range of configurations from small, easily portable scooter units with a small range and low speed, to faired or enclosed units capable of carrying several divers longer distances at higher speeds. The earliest recorded DPVs were used for military purposes during World War II and were based on torpedo technology and components. Structure A DPV usually consists of a pressure-resistant watertight casing c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wet Sub
A wet sub is a type of underwater vehicle, either a submarine or a submersible, that does not provide a dry environment for its occupants. It is also described as an underwater vehicle where occupants are exposed to ambient environment during operations. The watercraft is classified as medium-sized or small vessel. This type of submarine differs from other underwater personal transport devices by the fact that it has a hull around it and it is not a "bare bones" design. Usually, scuba divers ride outside the device as one would ride a motorcycle or in a semi-enclosed opening like a kayak or bobsled, although it can be designed to fully enclose its occupant(s) to reduce drag. An enclosed vehicle may also provide a dry viewing chamber for the occupant(s). The sub is generally propelled by an electric motor and is battery powered. The depth and endurance is typically limited by the requirements of the divers, particularly water temperature and breathable air. Military use Wet subs h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unmanned Underwater Vehicle
Unmanned underwater vehicles (UUV), also known as underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input. Classifications Remotely operated underwater vehicle Remotely operated underwater vehicle, Remotely Operated Underwater Vehicles (ROUVs) is a subclass of UUVs with the primary purpose of replacing humans for underwater tasks due to the difficult underwater conditions. ROUVs are designed to perform educational or industrial missions. They are manually controlled by an operator to perform tasks that include surveillance and patrolling. The structure of ROUVs disqualify it from being able to operate autonomously. In addition to a camera, actuators, and sensors, ROUVs often incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Vehicle
An underwater vehicle is any member of the class of watercraft that is intended to operate in the underwater environment, as opposed to surface vessels that only stay afloat on top of water. This article lists the types of underwater vehicle, with a brief description of each type. An underwater vehicle can be crew A crew is a body or a group of people who work at a common activity, generally in a structured or hierarchy, hierarchical organization. A location in which a crew works is called a crewyard or a workyard. The word has nautical resonances: the ta ...ed or unmanned (which may be remotely operated or fully autonomous), and will generally, but not necessarily, have some form of onboard propulsion system. Types * * * * (towed underwater vehicle) * * * * * * * (towed underwater vehicle) {{Underwater diving, other Vehicles Underwater diving lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paddleboard
Paddleboarding is a water sport in which participants are propelled by a swimming motion using their arms while lying or kneeling on a paddleboard or surfboard in the ocean or other body of water. Paddleboarding is usually performed in the open ocean, with the participant paddling and surfing unbroken swells to cross between islands or journey from one coastal area to another. History Polynesia Ships Artist John Webber accompanied Captain James Cook to the Sandwich Islands in 1778, and in the lower left foreground of his 1781 engraving is depicted a paddleboarder/surfer. Thomas Edward Blake Thomas Edward Blake is credited as the pioneer in paddleboard construction in the early 1930s. While restoring historic Hawaiian boards in 1926 for the Bernice P. Bishop Museum, Blake built a replica of the previously ignored ''olo'' surfboard ridden by ancient Hawaiian '' alii'' (kings). He lightened his redwood replica (''olo'' were traditionally made from '' wiliwili'' wood) by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kayak
] A kayak is a small, narrow human-powered watercraft typically propelled by means of a long, double-bladed paddle. The word ''kayak'' originates from the Inuktitut word '' qajaq'' (). In British English, the kayak is also considered to be a kind of canoe. There are countless different types of kayaks due to the craft being easily adaptable for different environments and purposes. The traditional kayak has an enclosed deck and one or more cockpits, each seating one occupant or kayaker, differentiating the craft from an open-deck canoe. The cockpit is sometimes covered by a spray deck that prevents unwanted entry of water from waves or splashes. Even within these confines, kayaks vary vastly in respect to materials, length, and width, with some kayaks such as the sprint kayak designed to be fast and light, and others such as the whitewater kayak designed to be sturdy and maneuverable. Some modern paddlecrafts, which still claim the title "kayak", remove integral parts of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
