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Arleigh Burke-class destroyers have proven to be dependable in combat. Though it was commissioned in 1991, these destroyers are still getting upgrades and further orders today. They have also been been built around the Aegis.
There were three major advances that differentiated the Aegis from other combat systems. Namely, these were the SPY-1 phased array radar, the Mk 41 vertical launch system, and the integrated combat system.
Upgrading the destroyer was a no-brainer after the fiscal failure of the Zumwalt-class destroyers. The Flight III, its most recent model, is almost a complete redesign, bringing in a new electronic warfare system, an Aegis Baseline 10 combat system, and a new SPY-6 radar which could detect objects four times farther than the SPY-1.
It all boils down to the hull’s service life allowance or SLA. This is why warships are designed with extra space to house future technologies. The SLA on the Arleigh Burke-class’ platform has been fully consumed. Even with an enlarged deckhouse, the Flight III could only accommodate a 14-ft version of the SPY-6, a far cry from its 20-ft requirement.