 Kingfisher-class sloop

The "Kingfisher" class was a class of nine patrol sloops of the British Royal Navy built in three groups of three each during the 1930s, that saw service during World War II, mainly on East coast convoys in the North Sea.The "Kingfisher" class was an attempt to build a patrol vessel under 600 tons, due to the lack of clauses on vessels this size in the London Naval Treaty of 1930.