H-class lifeboat


The H-class lifeboat is actually a rescue hovercraft, deployed around the United Kingdom, as a part of the RNLI inshore fleet.
A modified Type 470TD design, built by Griffon Hoverwork, they were developed to operate on intertidal mudflats and sand, such as Morecambe Bay, in waters too shallow for normal craft, where strandings by incoming tides can have fatal consequences.
A Hovercraft was first assigned to in 2002, followed by in 2003, and at and in 2004. In 2016, the New Brighton Hovercraft H-005 Hurley Spirit was reassigned to.
In 2023, trials were carried out by the RNLI, assisted by the team at Hoylake station, to evaluate different crafts being considered as a potential successor to the current hovercraft.

Construction

The hovercraft is manufactured by Griffon Hoverwork of Southampton, and is a modification of the standard 450TD, now designated the 470TD. This resulted in an increased length, greater stability, buoyancy and thrust, and decreased noise levels.
The hull is constructed from marine-grade aluminium, with the superstructure and fan ducts manufactured from moulded FRC. The body of the hovercraft is in length, with the skirt bring the total length to. The craft is powered by twin Volkswagen AVM 1.9 litre inline 4-cylinder turbocharged 84-hp diesel engines, and can achieve a maximum speed of 30 knots. The engines supply power both to provide air-pressure under the hull to lift the craft, and also to provide thrust through the fans mounted at the rear.

Fleet

Op.No.NamePrincipal StationComments
H-001Molly Rayner2002–Relief fleet
2002–
H-0032003–
H-004Vera Ravine2004–
H-005Hurley Spirit
H-006John Russell2005–Relief fleet
H-007Samburgh2009–Relief fleet