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 limited changes from the Flight II to the Flight III "Burke"s. However, costs for the Flight III "Burke"s 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 what the cost would be to modify 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 "Burke"s and the "Zumwalt"s and if they were both upgraded to the same combat system then the only limitation of the "Zumwalt"s in this role would be their limited missile magazines.