Lockheed Martin has a concept for a waterbourne attack vehicle that it calls CHARC for Covert High-speed Attack and Reconnaissance Craft.
http://blog.wired.com/defense/2007/10/lockheeds-swath.html
http://www.gizmag.com/go/3768/
http://www.popularmechanics.com/technology/industry/1287776.html
http://www.trygstad.org/blog/archives/week_2004_03_14.html
http://blog.wired.com/defense/2007/10/lockheeds-swath.html
http://www.gizmag.com/go/3768/
http://www.popularmechanics.com/technology/industry/1287776.html
http://www.trygstad.org/blog/archives/week_2004_03_14.html