sentences:  As of July 2001, 32 DD-21s were planned, with construction planned to start in FY05.Many of the weapons planned for the DD-21 were to be trialled in existing ships, increasing the land attack capability of the existing fleet in FY05 before the delivery of DD-21 in FY10.Rocket-boosted Extended Range Guided Munitions (ERGM) for existing 5"/62 guns would have a range of , while the long-range Block IV Tactical Tomahawk missile could be fired from existing Mk 41 vertical launching systems.