The S-Boat War Badge () is a German military decoration awarded to Kriegsmarine members for service on fast attack craft or torpedo boats worn on the lower part of the left breast pocket of the naval service tunic, underneath the 1st class Iron Cross if awarded, or equivalent grade award. Requirements included an outstandingly successful sortie, wounds in action, 12 sorties against enemy vessels or installations, or outstanding leadership. The Badge was made in two versions. The first was instituted on May 30, 1941, the second in January 1943. Both were designed by Wilhelm Ernst Peekhaus of Berlin. A third exclusive version with nine diamonds replacing the solid bars of the swastika at the top, also exists, but only eight are known to have been awarded. The criteria for this award were 1.