Complex sentence: While searching for a convoy west of Ireland on 3 September, she was attacked by an escort with depth charges in five separate efforts, when she suffered considerable damage and began to flood, which was controlled by the crew.
Split into simpler sentences: While searching for a convoy west of Ireland on 3 September. She was attacked by an escort with depth charges in five separate efforts, when she suffered considerable damage and began to flood, which was controlled by the crew.