Designed by J. A. McLachlan the ragged chine inshore lifeboat was intended to have a greater offshore capability than the D class inflatable. A succesful boat (her helmsman winning a Bronze Medal in 1975) the class was eventually superseded by the arrival of the rigid inflatable Atlantic 21.

Type 18ft 6in McLachlan Inshore Lifeboat Built 1970 Length 18ft 6m Stationed at Weston-super-Mare.

Displayed on a high cradle to show the unusual 'ragged chine' hull which minimised wave action on the hull at speed A 504 is pan of the display showing the history of the inshore lifeboat..