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Rigid Buoyant Boat
The rigid buoyant boat (RBB) is a light-weight but high performance and high capacity boat. Based on the concept of a Rigid-hulled inflatable boat (RHIB), it has a tube/sponson manufactured from a solid material such as moulded polyethylene or aluminium and therefore being much more robust than the fabrics commonly used. Boats with foam filled collars such as the ''secure all-around flotation equipped'' (SAFE) boats employed by the US Coast Guard can also be classified as Rigid Buoyant Boats rather than "true" RHIBs as the collar is solid foam rather than inflated. The handling tends to be very similar to a RHIB; likewise they will remain afloat (buoyant) even if completely flooded. Aluminium RBBs tend to be bespoke (custom-made to specification) or low-volume products whilst the tooling cost of rotomolded polyethylene boats tends to require these to be higher volume products. At least three manufacturers are producing rotomolded boats of this type. One supplier has demonstrated th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boat
A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats, such as the whaleboat, were intended for use in an offshore environment. In modern naval terms, a boat is a vessel small enough to be carried aboard a ship. Boats vary in proportion and construction methods with their intended purpose, available materials, or local traditions. Canoes have been used since prehistoric times and remain in use throughout the world for transportation, fishing, and sport. Fishing boats vary widely in style partly to match local conditions. Pleasure craft used in recreational boating include ski boats, pontoon boats, and sailboats. House boats may be used for vacationing or long-term residence. Lighters are used to convey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rigid-hulled 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 a high pressure so as 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. History Origins in Wales The combination of rigid hull and large inflatable buoyancy tubes had been conceived by a Royal National Lifeboat Institution (RNLI) team working under Inspector of Lifeboats Dag Pike in 1964 as a means of reducing the wear and tear of the fabric botto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyethylene
Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(methylene)) is the most commonly produced plastic. It is a polymer, primarily used for packaging ( plastic bags, plastic films, geomembranes and containers including bottles, etc.). , over 100 million tonnes of polyethylene resins are being produced annually, accounting for 34% of the total plastics market. Many kinds of polyethylene are known, with most having the chemical formula (C2H4)''n''. PE is usually a mixture of similar polymers of ethylene, with various values of ''n''. It can be ''low-density'' or ''high-density'': low-density polyethylene is extruded using high pressure () and high temperature (), while high-density polyethylene is extruded using low pressure () and low temperature (). Polyethylene is usually thermoplastic, but it can be modified to become thermosetting instead, for example, in cross-linked polyethylene. History Polyethylene was first synthesized by the German chemist Hans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It has a great affinity towards oxygen, and forms a protective layer of oxide on the surface when exposed to air. Aluminium visually resembles silver, both in its color and in its great ability to reflect light. It is soft, non-magnetic and ductile. It has one stable isotope, 27Al; this isotope is very common, making aluminium the twelfth most common element in the Universe. The radioactivity of 26Al is used in radiodating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ is small and highly charged; as such, it is polarizing, and bonds aluminium forms tend towards covalency. The strong affinity tow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bespoke
The word ''bespoke'' () has evolved from a verb meaning 'to speak for something', to its contemporary usage as an adjective. Originally, the adjective ''bespoke'' described tailor-made suits and shoes. Later, it described anything commissioned to a particular specification (altered or tailored to the customs, tastes, or usage of an individual purchaser). In contemporary usage, ''bespoke'' has become a general marketing and branding concept implying exclusivity and limited runs. Origin ''Bespoke'' is derived from the verb ''bespeak'', meaning to "speak for something". The particular meaning of the verb form is first cited from 1583 and given in the ''Oxford English Dictionary'': "to speak for, to arrange for, engage beforehand: to 'order' (goods)." The adjective "bespoken" means "ordered, commissioned, arranged for" and is first cited from 1607. According to ''Collins English Dictionary'', the term was generally British English in 2008. American English more commonly uses the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotomold
Rotational molding (BrE: moulding) involves a heated mold which is filled with a charge or shot weight of material. It is then slowly rotated (usually around two perpendicular axes), causing the softened material to disperse and stick to the walls of the mold forming a hollow part. In order to form an even thickness throughout the part, the mold rotates at all times during the heating phase, and then continues to rotate during the cooling phase to avoid sagging or deformation. The process was applied to plastics in the 1950s but in the early years was little used because it was a slow process restricted to a small number of plastics. Over time, improvements in process control and developments with plastic powders have resulted in increased use. Rotocasting (also known as rotacasting), by comparison, uses self-curing or UV-curable resins (as opposed to thermoplastics) in an unheated mould, but shares slow rotational speeds in common with rotational molding. This kind of rotocas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Unit Riverine Craft
The small unit riverine craft (SURC) is rigid-hull, armed and armored patrol boat used by the U.S. Marines and U.S. Navy to maintain control of rivers and inland waterways. They are similar in size and purpose to the much older Patrol Boat, River vessels used during the Vietnam War. According to the Navy, “The primary mission of the SURC is to provide tactical mobility and a limited weapons platform for the ground combat element of a Marine Air Ground Task Force in littoral and riverine environments.”Wavelengths Online. “Small Unit Riverine Craft”, May 17, 2004 The boat's secondary mission includes “command and control, reconnaissance, logistic/resupply, medevac, counter-drug operations, humanitarian assistance, peacekeeping, and noncombatant evacuation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USCG Defender Class Boat
The Defender-class boat, also called Response Boat–Small (RB-S) and Response Boat–Homeland Security (RB-HS), is a standard boat introduced by the United States Coast Guard in 2002. The boats serve a variety of missions, including search and rescue, port security and law enforcement duties and replaces a variety of smaller non-standard boats. The design length of the hull is 25 feet and the boat is officially referred to as such. However, the overall length with engines mounted is approximately . Powered by twin outboard motors, they are capable of speeds in excess of and have a range of 150 to , depending on the class. The boat requires a minimum crew of two persons, but has a carrying capacity for 10 persons. The boat is easily trailerable and can be transported by a C-130 Hercules aircraft or truck. Although similar in appearance to a rigid-hulled inflatable boat, the Defender is actually an aluminum-hulled vessel, equipped with a rigid foam-filled flotation collar. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-density Polyethylene
High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. It is sometimes called "alkathene" or "polythene" when used for HDPE pipes. With a high strength-to-density ratio, HDPE is used in the production of plastic bottles, corrosion-resistant piping, geomembranes and plastic lumber. HDPE is commonly recycled, and has the number "2" as its resin identification code. In 2007, the global HDPE market reached a volume of more than 30 million tons. Properties HDPE is known for its high strength-to-density ratio. The density of HDPE ranges from 930 to 970 kg/m3. The standard method to test plastic density is ISO 1183 part 2 (gradient columns), alternatively ISO 1183 part 1MVS2PRO density analyzer. Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HDPE RBB 600 WJ By Tideman Boats
High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. It is sometimes called "alkathene" or "polythene" when used for HDPE pipes. With a high strength-to-density ratio, HDPE is used in the production of plastic bottles, corrosion-resistant piping, geomembranes and plastic lumber. HDPE is commonly recycled, and has the number "2" as its resin identification code. In 2007, the global HDPE market reached a volume of more than 30 million tons. Properties HDPE is known for its high strength-to-density ratio. The density of HDPE ranges from 930 to 970 kg/m3. The standard method to test plastic density is ISO 1183 part 2 (gradient columns), alternatively ISO 1183 part 1MVS2PRO density analyzer. Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RNLI
The Royal National Lifeboat Institution (RNLI) is the largest charity that saves lives at sea around the coasts of the United Kingdom, the Republic of Ireland, the Channel Islands, and the Isle of Man, as well as on some inland waterways. It is one of several lifeboat services operating in the same area. Founded in 1824 as the National Institution for the Preservation of Life from Shipwreck, soon afterwards becoming the Royal National Institution for the Preservation of Life from Shipwreck, under the patronage of King George IV. On 5 October 1854, the institution’s name was changed to its current name (RNLI), and in 1860 was granted a royal charter. The RNLI is a charity in the UK and in the Republic of Ireland and has enjoyed royal patronage since its foundation, the most recent being Queen Elizabeth II until her death on 8 September 2022. The RNLI is principally funded by legacies (65%) and donations (28%), with the remainder from merchandising and investment. Most of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Thames
The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, second-longest in the United Kingdom, after the River Severn. The river rises at Thames Head in Gloucestershire, and flows into the North Sea near Tilbury, Essex and Gravesend, Kent, via the Thames Estuary. From the west it flows through Oxford (where it is sometimes called the Isis), Reading, Berkshire, Reading, Henley-on-Thames and Windsor, Berkshire, Windsor. The Thames also drains the whole of Greater London. In August 2022, the source of the river moved five miles to beyond Somerford Keynes due to the heatwave in July 2022. The lower reaches of the river are called the Tideway, derived from its long tidal reach up to Teddington Lock. Its tidal section includes most of its London stretch and has a rise and fall of . From Oxford to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
