The AN/SPY-1 system, more popularly known as "Aegis," is arguably the best air-defense system sent out to sea. It has been exported to South Korea, Japan, Spain, and Australia. But the U.S. Navy has not been sitting still with the design.
The AN/SPY-6(V) Air and Missile Defense Radar is planned for use on the Flight III Arleigh Burke-class guided missile destroyers.
According to the Raytheon web site, this modular radar system is 30-times more sensitive than the SPY-1D used on the current Arleigh Burke-class vessels. This system can also handle 30 times as many targets as the SPY-1D. The system also used commercially-available computer processors in the x86 family pioneered by Intel.
A Raytheon SM-3 launches from the vertical launcher on the front deck of a ship. | Raytheon
The AMDR was tested July 27, 2017, by the Navy. According to a Navy release, the system successfully tracked the target — a simulated medium-range ballistic missile — or "MRBM." According to the Department of Defense, MRBMs have a range between 1,000 and 3,000 kilometers, or about 600 to 1,800 miles.
Perhaps the most notable missile in this category is China's DF-21, which supposedly has a carrier-killer version.
"AN/SPY-6 is the nation's most advanced radar and will be the cornerstone of the U.S. Navy's surface combatants for many decades," said Aegis program official Capt. Seiko Okano.
USS Hopper (DDG 70) fires a RIM-161 SM-3 missile in 2009. (US Navy photo)
The first Flight III Arleigh Burke-class guided missile destroyer, USS Harvey C. Barnum (DDG 124), is slated to enter service in 2024. These ships will have a five-inch gun, two Mk 41 vertical launch systems (one with 32 cells, the other with 64 cells) capable of firing RIM-66 Standard SM-2 missiles, RIM-174 SM-6 missiles, RIM-161 SM-3 missiles, RIM-162 Evolved Sea Sparrow Missiles, BGM-109 Tomahawk cruise missiles, and RUM-139 Vertical-Launch ASROCs.
It'll also be armed with a Mk 15 Phalanx Close-In Weapon System, and two MH-60 Seahawk helicopters.
You can see a video from Raytheon about AMDR below.