effective as modeled" in live test-firing, and "nowhere near meeting the requirements"; he admitted that the results were not what he expected to see. When the Naval Weapons Laboratory re-evaluated the Mk 46, it met or exceeded requirements and performed equal to or better than the 57 mm in multiple areas, even coming just ahead of the naval cannon. A 30 mm gun mount also weighs less, around 2 tons compared to 12–14 tons for the 57 mm, but the Navy is adamant that weight had nothing to do with the decision. See also List of naval ship classes in service Guided-missile destroyer References Citations Sources Army Regulations 600-8-27 dated 2006 Further reading External links Raytheon's official DDG 1000 Program web page Zumwalt class Destroyer on Navy Recognition site Advanced Gun System set to be installed on the DD(X) destroyers Concept of employment for naval surface fire support (near term capability) Destroyer classes Stealth ships