The first ship in the US Navy’s $23-billion programme to build a new class of destroyers is scheduled for a September delivery – more than five years later than originally scheduled and ten years after construction began on the stealthy vessels built by General Dynamics Corp. Delivery plans for the Zumwalt-class guided missile destroyer have been a roller-coaster of changing milestones, most recently moved from May of this year to September, according to budget documents confirmed by a Navy spokesperson. The ship isn’t expected to have an initial combat capability until September 2021, at least three years later than planned.