GWX is an addon to the submarine simulation Silent Hunter III, and was released December 16th, 2006. It was developed by a team of people, with "Kpt. Lehmann" as Project Manager. It is freeware. Kpt. Lehmann and his fellow modders had previously released the mods Grey Wolves (GW). GWX is a direct followup of this effort. GWX is best described as a compilation of community made modifications, in a cohesive package. It is built so that no mods will interfere with each other.