Raddall, Thomas H. "Action at Sea"

Young Canadian Orton Portingale, aged 30, son and grandson of sea captains and with a master’s ticket of his own, finds his civilian career interrupted by the Second World when he takes command of the corvette H.M.S. WINDLESTRAW. He and his crew engage in nearly non-stop North Atlantic convoy duty. Though well-trained, they seem to have no luck in actually sinking a German U-boat or downing an enemy aircraft. This all changes one day, in mid-Atlantic, during a German aircraft attack on their convoy when the WINDLESTRAW blows a Folker-Wulff bomber out of the air in a most unusual manner: with depth charges which had been catpulted from the corvette’s stern in attempt at sinking a lurking submarine!