10. The above figures are exclusive of the Naval Air Service, the strength of which at 1st May, 1940, was as follows:Modern flying boats and Float Planes 46 Obsolescent " " " " " 36 obsolete " " " " " 52 Land aircraft Modern fighters 50 Dive Bombers 48 No information is available of naval aircraft losses but these are believed to have been heavy in the case of modern fighters and dive bombers. 11. The above estimate excludes assembled and unassembled aircraft in parks and factories left in occupied territory at the time of the German advance.