Operation Collie was a British naval operation in World War II, from 5–11 July 1945. Its objectives were, firstly, naval bombardment and aerial strikes on Japanese positions in the Nicobar Islands, [1] particularly on Nancowry Island; [2] secondly, providing cover for minesweeping operations in advance of a possible invasion; [1] and thirdly, making carrier raids on Japanese airfields in northern Sumatra. [2] These measures were a prelude for an invasion, Operation Zipper, which was never carried out due to the Surrender of Japan. [3]
Operation Collie was carried out under the direction of Rear Admiral Wilfrid Patterson, [1] by Ruler-class aircraft carriers HMS Ameer and HMS Emperor, [2] light cruiser HMS Nigeria, [1] destroyers HMS Roebuck, HMS Eskimo, and HMS Vigilant, and escort carriers HMS Stalker and HMS Empress, [2] and the 6th Minesweeping Flotilla. [1] The carriers transported Grumman F6F Hellcats of the 884 Naval Air Squadron, which flew 82 sorties. [1] Accounts of casualties vary, but one report indicates that two pilots were killed, one during take-off, one in action; and six aircraft were lost, three to enemy action; [1] while another indicated that seven aircraft were lost from the Ameer, with all pilots rescued. [4] Overall, the mission was a success, with one report noting that "three flotillas of minesweepers cleared 167 mines off the northwest coast of Malaya and from the waters around the Nicobars." [3]