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Advanced Gun System
The Advanced Gun System is a naval gun system under development by BAE Systems Armaments Systems (formerly United Defense) for the ''Zumwalt''-class destroyer of the United States Navy. Production has started; the first magazine was delivered to the U.S. Navy on 25 May 2010.
Originally designed for mounting as a vertical gun, this 155 mm (6.1") caliber gun has since been slated for mounting within a more conventional turret arrangement. The AGS is designed to offer a weapon system capable of delivering precision munitions at a high rate of fire and at over-the-horizon ranges. As a vertical gun system it would only have been capable of firing guided munitions; the turret mounting will allow the use of unguided munitions as well.
== History ==
There has been research on extending the range of naval gunfire for many years. Gerald Bull and Naval Ordnance Station Indian Head tested an 11 inch sub-caliber saboted long-range round〔, citing a letter from Major Tracy Ralphs to Senator John Warner on 1999-02-25〕 in a stretched 16"/45 Mark 6 battleship gun in 1967.〔(【引用サイトリンク】United States of America 16"/50 (40.6 cm) Mark 7 )〕 The Advanced Gun Weapon System Technology Program (AGWSTP) evaluated a similar projectile with longer range in the 1980s.〔 After the battleships were decommissioned in 1992, the AGWSTP became a 5-inch gun with an intended range of , which then led to the Vertical Gun for Advanced Ships (VGAS). The original DD-21 was designed around this "vertical gun", but the project ran into serious technology/cost problems and was radically scaled back to a more conventional 6.1 inch Advanced Gun System (AGS). One advantage of this move was that the gun was no longer restricted to guided munitions.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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