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Appendix 35: The Air War against British Coastal Shipping, November 1940–December 1941

Month Number of Attacks or imminent Attacks on Ships within 40 miles of a Fighter Aerodrome Number of Ships Sunk Number of Daylight Defensive Sorties by Fighter Command
Day Night Total Day Night Total Total To Protect Ships
1940
November 81 11 92 .. .. 11 14,154 402
December 33 33 4 4 6,843 504
1941
January 31 5 36 2 2 3,836 350
February 41 16 57 7 3 10 5,736 443
March 89 19 108 21 3 24 11,672 2,103
April 124 72 196 10 11 21 16,102 7,876
May 41 60 101 7 11 18 15,812 8,287
June 40 79 119 3 20 23 12,635 7,331
July 11 68 79 1 7 8 9,924 6,475
August 17 34 51 1 2 3 8,282 5,685
September 16 47 63 6 6 6,444 4,416
October 8 33 41 1 4 5 6,682 4,072
November 23 38 61 1 8 9 6,631 3,952
December 6 27 33 1 2 3 5,594 3,591