Maybe confused with US Army Air Force Anti-Submarine Ops during WW2.
While stationed at St. Eval, Cornwall, the 1st Antisubmarine Squadron operated under the control of RAF Coastal Command.It flew its first mission on November 1...
Two months later, in January 1943, the 2d Antisubmarine Squadron joined the 1st at St. Eval. The two squadrons became the 1st Antisubmarine Group (Provisional)
St Eval (RAF St Eval), St Eval, England (1939-1959)
Operational/USAAF 10-1942/RAF late 1944?/Care & Maintenance 6-3-1959/ATC