St Cybi (Civil Service No.9) is one of 20 Barnett class boats built.

At 52ft they were the largest RNLI lifeboats at the time and were fine seaboats. All were built with open cockpit steering position but St Cybi was later fitted with an enclosed wheelhouse Type 52ft Barnett Twin-Screw Lifeboat Built 1950 Length 52ft Beam 13ft 6m Stationed at Holyhead and Relief.

St Cybi took part in a famous double Gold Medal service in 1966 and the theme of the display is 'Heroism and Sacrifice'..