My grandfather flew a B-25D Mitchell named "Lady Godiva" (S/N 41-30778) with the 7th Air Force, 41 Bomb Group, 396th Bomb Squadron in the Central Pacific during World War II. My grandfather completed 50 combat missions in the B-25. On 30 January 1944, on a mission to Wotje Island, my grandfather attacked and sunk a Japanese ship (picture attached taken from tail gunner position of my grandfather's B-25) in the waters off Wotje Island. The mission report said, "125 - 150 ft AK hit by 500lb GP bomb from A/P 778. AP 809 observed bomb burst from A/P 778 to make a direct hit into hull of AK. The first bomb was short and the third and fourth bombs went over the AK." I have been trying to identify what type of ship this was and I think it is a Wa-1 or Wa-2 minesweeper, but I am not sure. I would appreciate any help in identifying this ship. What does "AK" mean in the mission report?