/learn/publications/b/blog/posts/boeing-lockheed-join-military-research-program-to-develop-faster-more-energy-efficient-undersea-vehicleArtist's impression of "Blue Wolf" The range of underwater vehicles is limited by the amount of energy available for propulsion and the power required for a given underwater speed. Underwater propulsive power varies roughly with the cube of spee...en-USTelligent Community 12