In my FOTRSU career I am patrolling the Bismarck Sea trying to catch shipping from/to Rabaul. For the better part of a day Harder has been tracking a large freighter as she zigzags every so often. Finally, Harder is positioned in front and reasonably confidant the next turn won't be for several miles. I am within a minute of firing and this freighter just explodes in front of me. Out of the smoke comes a PBY who circles and drops another bomb to finish his work.