Grey Wolf Grey Sea Author:E.B. Gasaway This is the story of the German submarine U-124 and her celebrated commander, Kapitanleutnant Jochen Mohr. In her short life, Mohr's U-124 sank 49 ships for a total of 226,949 tons to become the most successful of all the hundreds of Axis and Allied submarines which fought in World War II. Eight pages of photographs.