The U.S. Army Tank Automotive Command (TACOM) has developed a Vetronics Crew Display Demonstrator (VCDD) to aid in the design of crew-system interfaces in future land combat vehicles. One major component of such vehicles will be a combat vehicle command and control (CVC2) system, which will include innovative navigation and communication functions. The VCDD has been configured to simulate a range of CVC2 system concepts that vary widely in appearance and method of crew-system interaction. Use of the VCDD has provided TACOM with insights into the potential benefits of alternative CVC2 system concepts, and will support continued development of CVC2 system requirements.