The first Arleigh Burke (DDG-21) Flight IIA-class guided missile destroyer, the Oscar Austin (DDG-79), is seen here at Bath Iron Works just after launch on 7 November 1998. Two sisters also are now in the water, the Ingalls-built Roosevelt (DDG-80), launched 10 January 1999, and the Bath-built Winston S. Churchill (DDG-81), to launch this month. Plans call for 29 of these 9,217-ton full-load displacement ships, which differ from their 21 Flight I and II half-sisters primarily in incorporating twin hangars for SH-60R Seahawk helicopters; the earlier ships had only a landing pad. To clear the helicopter facilities, the two aftward-facing fixed antenna arrays for the AN/SPY-1D Aegis radar system were raised 8 feet, and the hull was lengthened aft by 5 feet. DDG-80 introduces a faceted housing for the 5-inch gun, and DDG-81 and later are to carry the new 5-inch/62-caliber Mk 45 Mod. 4 gun, capable of firing extended-range guided munitions to 63 nautical-mile ranges. DDG-88 on are to have the AN/SPY-lE radar with an improved capability to detect and track low-observable targets; DDG-91 on will have the AN/SPY-2 Advanced Integrated Electronic Warfare System. All ships of the series will have the Cooperative Engagement Capability. The Oscar Austin is scheduled for delivery in February 2000.