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SS class airship
SS (''Submarine Scout'' or ''Sea Scout'') class airships were simple, cheap and easily assembled small non-rigid airships or "blimps" that were developed as a matter of some urgency to counter the German U-boat threat to British shipping during World War I. The class proved to be versatile and effective, with a total of 158 being built in several versions.〔(SS class airship. ) Airship Heritage Trust. Retrieved on 18 March 2009.〕
==Requirement==
Soon after the outbreak of World War I, the threat to British shipping from German submarines became increasingly apparent, with numerous losses occurring during October and November 1914. Then, on 4 February 1915, a communiqué issued by the Imperial German Admiralty declared that: "All the waters surrounding Great Britain and Ireland, are hereby declared to be a war zone. From February 18 onwards every enemy merchant vessel found within this war zone will be destroyed."〔(Neville Florian Usborne ), Usborne family tree. Retrieved on 19 March 2009.〕
The situation had become critical and the Admiralty recognised that airships would be effective at spotting submarines and useful for Fleet observations, but at that time Britain's airship fleet consisted of just seven craft – four RNAS airships (HMA 17,18,19, and 20), two continental ships and a small Willows training craft – with only four airfields existing that possessed hangars capable of housing them.〔〔The initial four airfields that possessed hangars capable of housing airships were located at RAE Farnborough, at the Vickers production facility in Barrow-in-Furness, at Wormwood Scrubs Naval Air Station in London and at RNAS Kingsnorth near Hoo on the Medway.〕 Consequently, on 28 February the First Sea Lord, Admiral Lord Fisher called a meeting with Commander E A D Masterman (Officer Commanding the Naval Airship Section) and representatives from Vickers and the London-based firm of Airships Limited to discuss the possibilities of creating a fleet of suitable patrol airships, sometimes referred to as "scouts".〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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