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Rigid inflatable boat

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Rigid inflatable boat

A rigid inflatable boat (RIB), also rigid-hull inflatable boat or rigid-hulled inflatable boat (RHIB), is a lightweight but high-performance and high-capacity boat constructed with a rigid hull bottom joined to side-forming air tubes that are inflated with air to high pressure to give the sides resilient rigidity along the boat's topsides. The design is stable, light, fast and seaworthy. The inflated collar acts as a life jacket, ensuring that the vessel retains its buoyancy, even if the boat is taking on water. The RIB is an evolutionary development of the inflatable boat with a rubberized fabric bottom that is stiffened with flat boards within the collar to form the deck or floor of the boat.

The concept of configuring a rigid hull surrounded by an inflated, compartmentalized buoyancy tube from prow to transom originated and evolved from the problems that plagued existing rubberized fabric bottom inflated motorboats: fabric wear-through and poor sea keeping due to lack of immersed hull structural rigidity. A solution was sought starting at Atlantic College, the first of now 18 United World Colleges, which had opened on the southern coast of Wales in 1962, founded partly by Kurt Hahn, the German educator who had earlier originated Outward Bound in Aberdovey Scotland during the Second World War for instilling ‘resilience’ and moral fortitude in youth.

Development of the RIB was originally undertaken by students and staff under the direction of retired Royal Navy Admiral Desmond Hoare, who headed the 6th form (senior secondary) college.

A series of experimental and prototype solutions for effectively combining a hard hull form with a pressurized, air-filled rubber infused nylon fabric (Hypalon) sponson lasted for over a decade. The RHIB craft developed at Atlantic College served as an effective seafront activities safety and rescue boat for the college's fleet of sailing dinghies on the often challenging Bristol Channel, and the college went on to become an Inshore Lifeboat Station for the RNLI in 1963, carrying out countless rescues over the next 50 years.[original research?]

The Royal National Lifeboat Institution had been operating entirely inflated small motorized boats for close to shore rescue recovery that were nautically limited in their capacity, range, endurance, sea keeping, sea worthiness and top speed.

The RNLI's "B-Class Atlantic Inshore Lifeboat" (including the Atlantic 21, the Atlantic 75, and Atlantic 85) was named in honor of the college's role in its development. The Atlantic College Lifeboat Station was decommissioned by the RNLI in 2013. The video RIB History at UWC Atlantic College provides a visual historical summary.

In 1964, Rear-Admiral Hoare and his students at Atlantic College replaced the torn bottom of their 12 ft (3.7 m) sailing activity rescue inflatable boat with a plywood sheet glued to the inflatable tubes. This proved a successful modification but was rather uncomfortable at speed offshore, and so the hull was rebuilt with a shallow-vee bow entry transitioning to a nearly flat section stern. This boat was named Atlanta and later that year an Atlantic College RIB was displayed at the London Boat Show.

By 1966 the students had built a further five rigid inflatable boats – the 15 ft (4.6 m) Aphrodite and 16 ft (4.9 m) Triton for the college's own use, and the 16 ft (4.9 m) X1 and 22 ft (6.7 m) X2 which were made under a development agreement with the Royal National Lifeboat Institution (RNLI) and were launched in 1965 by Queen Elizabeth II. They were taken by the RNLI for trials at Gorleston (X1) and Great Yarmouth (X2) from which they returned to Atlantic College in Spring 1967. X3 was an experimental vortex-lift hull funded by a private developer and was not greatly successful.

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