 By August 1942 , preparations were begun for a major operation , Jubilee , at Dieppe . The Dieppe raid took place on 19 August 1942 . Johnson took off at 07 : 40 in Spitfire VB . <unk> , DW @-@ B. Running into around 50 Bf 109s and Fw 190s in fours , pairs and singly . In a climbing attack Johnson shot down one Fw 190 which crashed into the sea and shared in the destruction of a Bf 109F . While heading back to base , Johnson attacked an alert Fw 190 which met his attack head on . The dogfight descended from 8 @,@ 000 to zero feet . Flying over Dieppe , Johnson dived towards a destroyer in the hope its fire would drive off the Fw 190 , now on his tail . The move worked and Johnson landed back at RAF West Malling at 09 : 20 . For the remainder of the year , the squadron was moved to RAF Castletown in September 1942 to protect the Royal Navy fleet at Scapa Flow . 
