 On 11 August 1918 Lieutenant S. D. Culley took off successfully from lighter H5 towed by HMS "Redout".Culley intercepted and destroyed Zeppellin L 53 at the peak of the fighter's ceiling, rendezvoused with the destroyer and ditched his aircraft alongside the lighter.Restored seaplane lighter H21, built 1918 is held in the Fleet Air Arm Museum collection.