But there was not enough time before the port propeller of Olympic sliced through the submarine's pressure hull just aft of its conning tower. The crew of U-103 blew ballast tanks before scuttling their sinking submarine.
Unfortunately, the timing was too short for the port propeller of Olympic to cut through the submarine's pressure hull just aft of its conning tower. As a result, the crew of U-103 had to release ballast tanks before scuttling their doomed submarine.