sentences:  It carried out research and development work on water-based aircraft for service needs and also on their equipment and on air-sea rescue apparatus.The Establishment's work grew during its early years and by 1930 it was carrying out acceptance tests and trials on flying boats, seaplanes, and their associated equipment and armaments.With the start of the Second World War the Establishment was moved to the more secure and safer location of Helensburgh in Scotland, and in 1940 was put under the control of the Ministry of Aircraft Production.