British Royal Air Force destroyed Japanese flying boats according to the U.S. Joint Intelligence Committee. Daily summary dated 15 April 1942

An item reported that the British R.A.F. destroyed 13 enemy flying boats during an attack on the Japanese bases [at Port Blair] on the Andaman Islands.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 126 dated 15 April 1942.