BMD role, but they shared both the SM3 missile and the TSCE-I), the proposed radar of the CG(X) was much larger (22') and used much more energy and cooling capacity than the DDG-1000's. Since then, the radar system has been canceled with the CG(X), and it has been determined that a radar could be used either on DDG-51 or DDG-1000, though it would not have the performance the Navy predicts would be needed "to address the most challenging threats". Were the CG(X)'s BMD requirement adopted by the DDG-1000, the DDG-1000 would have to get the TSCE-I upgrade slated for the CG(X) to support that mission. The study that showed a cost benefit to building Flight III Arleigh Burke-class destroyer with enhanced radars instead of adding BMD to the Zumwalt-class destroyers assumed very few changes from the Flight II to III Burkes. However, costs for the Flight III Burkes have increased rapidly "as the possible requirements and expectations continue to grow." While the Flight III design and costs have been studied by the Navy, there is very little reliable data available on the cost of modifying a DDG-1000–class ship to provide a BMD capability. However, if the Air Missile Defense Radar is adopted in common on both the Flight III Burkes and the Zumwalts, and if they were both upgraded to the same combat system, then the only limitation of the Zumwalts in this role would be their limited missile magazines. With the awarding of the development contract to the next generation Air and Missile Defense S-Band Radar to Raytheon, deliberation to put this radar on the Zumwalt-class destroyer is no longer being actively discussed. It is possible for the Zumwalt-class destroyers to get the more limited BMD hardware and software modifications that would allow them to use their existing SPY-3 radar and Cooperative Engagement Capability to utilize the SM-3 missile and have a BMD capability similar to the BMD-capable s and Arleigh Burke-class Flight IIa destroyers. Procurement of a BMD-specific version of the Zumwalt-class destroyer was also proposed. Zumwalt PLAS cells can launch the SM-2 Standard missile, but the ships have no requirement for ballistic missile defense. The tubes are long and wide enough to incorporate future interceptors, and although the ship was designed primarily for littoral dominance and land attack, Raytheon contended that they could become BMD-capable with few modifications. Missile capacity The original DD-21 design would have accommodated