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Class overview
Operators	Royal National Lifeboat Institution
Preceded by	D Class (EA16)
In service	2004–
General characteristics
Displacement	338 kg (745 lb)
Length	4.9 m (16 ft)
Beam	2 m (6.6 ft)
Propulsion	1 × Mariner outboard engine, 50 hp (37 kW)
Speed	25 knots (29 mph; 46 km/h)
Endurance	3 hours at full speed
Complement	3 or 4

IB1 class lifeboats are inflatable boats serving in the UK's RNLI Inshore Lifeboat (ILB) fleet. 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".

This class of lifeboat is one of the smallest operated by the RNLI, and they are becoming a common sight at Lifeboat Stations round the coast. Unlike other members of the ILB fleet the IB1 (D-class) does not have a rigid hull, all others with the exception of the Arancia, hovercraft & ALB Tenders are Rigid Inflatable Boats or RIBs.

The IB1 normally has a crew of three or 4 and is primarily used for surfer/swimmer incidents as well as assisting in cliff incidents where the casualty is near the water. The very nature of its work requires a swift response, and the IB1 can normally be afloat within five minutes of the pagers going off.

External links

• RNLI Fleet
• IB1 class lifeboat at Burnham-on-Crouch RNLI Lifeboat Station
• North berwick lifeboat: Blue Peter III-a IB1 lifeboat

• Royal National Lifeboat Institution lifeboats
• Inflatable boats