sentences:  BIW partnered with Lockheed Martin as the combat system designer and integrator, forming the "Blue" team; Ingalls partnered Raytheon in the "Gold" team.The new design was compared to the current "Arleigh Burke" hull and possible developments of it, and it was decided to go ahead with a new hull to be called DD-21 (or DD 21), the 21st century Land Attack Destroyer.The new hull was judged to have more potential for stealth and reductions in manning than the "Arleigh Burke" class.