The Captain Class Frigates, seventy-eight modern and sturdy Destroyer Escorts known affectionately by all who sailed in them as the DEs, were built in the United States and leased to the Royal Navy.

This is a story of vigilance, determination and dogged fortitude combined with high skill and unfailing courage. It describes vividly the close teamwork and comradeship which existed within the Captain Class escort groups, as they faced the lethal submarine threat, in all weathers, week in and week out, with all too little opportunity for rest between operations. Without doubt these rugged ships and their resilient crews saved many thousands of lives. In assisting the safe passage of countless troops and the delivery of million tons of vital war materials and supplies across the Atlantic, the Captain Class frigates played a hugely significant role in the Allied victory over the Nazis.