The Fast Attack Craft War Badge or S-Boat War Badge (German: Schnellbootkriegsabzeichen) was a World War II German military decoration awarded to members of the Kriegsmarine for service on fast attack craft or patrol/torpedo boats.

[1] Requirements to receive the award included: an outstandingly successful sortie, wounded in action, 12 sorties against enemy vessels or installations, or outstanding leadership.

The original 1941 version consisted of a "shorter high-silhouette" S-boat with an outer gold laurel wreath of oak leaves with the German Eagle at the top, while clutching a swastika.

It had the same basic design, but with a "longer and newer" model S-boat and a larger German Eagle at the top.

The badge was worn on the lower part of the left breast pocket of the naval service tunic, underneath the 1st class Iron Cross, if awarded.