 Walker objected to Kenney 's suggestion that the bombers conduct attacks from low level with bombs armed with instantaneous fuses . Kenney ordered Walker to try the instantaneous fuses for a couple of months , so that data could be gained about their effectiveness ; a few weeks later Kenney discovered that Walker had discontinued the use of the instantaneous fuses . In November , Kenney arranged for a demonstration attack on the SS Pruth , a ship that had sunk off Port Moresby in 1924 and was often used for target practice . After the attack Walker and Kenney took a boat out to the wreck to inspect the damage . As expected , none of the four bombs dropped had hit the stationary wreck ; but the instantaneous fuses had detonated the bombs when they struck the water , and bomb fragments had torn holes in the sides of the ship . Walker reluctantly conceded the point . " Ken was okay , " Kenney later recalled . " He was stubborn , over @-@ sensitive , and a prima donna , but he worked like a dog all the time . His gang liked him a lot but he tended to get a staff of ' yes @-@ men ' . He did not like to delegate authority . I was afraid that Ken was not durable enough to last very long under the high tension of this show . " 
