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The four 52' MLBs: Invincible, Intrepid, Triumph, and Victory (L-R) USCG Invincible II heavy weather motor lifeboat. The Coast Guard bills the 52-foot MLBs as "virtually unsinkable", with self-righting and self-bailing capabilities and the ability to tow vessels as large as 750 long tons (760 t) in 30-foot (9.1 m) seas. [5]
The 60 ft (18.3 m) Barnett was the first twin-engined, twin-screw RNLI lifeboat, and when introduced in 1923, the largest. Designed by RNLI naval architect James Rennie Barnett , the boats pioneered many features which were to become standard on future lifeboats.
In 1899 the Lake Shore Engine Company, at the behest of the Marquette Life Saving Station, fitted a two-cylinder 12 hp (8.9 kW) engine to a 34-foot (10 m) lifeboat on Lake Superior, Michigan. Its operation marked the introduction of the term motor life boat (MLB). By 1909, 44 boats had been fitted with engines whose power had increased to 40 hp ...
The D-class (IB1) lifeboats are inflatable boats serving in the RNLI inshore lifeboat (ILB) fleet as well as a number of Independent Lifeboats around the UK and Ireland. Although they are known as the "IB1" at times, they are the latest development of the D-class lifeboat and as such are mainly referred to as a "D-class".
It is based on a Camarc Pilot vessel design, and was designed by RNLI engineers, with a fibre-reinforced composite hull, powered by twin water jets. It had a top speed of approximately 30 knots (55 km/h; 35 mph), but was planned to be rated down to 25–27 knots (46–50 km/h; 29–31 mph) when the final design was put into production.
The RNLI's first lifeboat capable of speeds in excess of 10 knots (19 km/h; 12 mph) was the 14-knot (26 km/h; 16 mph) Waveney-class boats introduced in 1967. This was based on an American design, but in 1971 it was supplemented by the Arun class which was designed by the RNLI and gave vastly improved accommodation and increased the speed to 18.5 knots (34.3 km/h; 21.3 mph).
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The Watson-class lifeboat is a design of wooden lifeboat operated by the Royal National Lifeboat Institution (RNLI) around the coasts of the United Kingdom and Ireland between 1888 and 1991. There were several variations over the years but all the boats had hulls that conformed to a design by George Lennox Watson , the RNLI's naval architect ...