Spain's Álvaro de Bazán-class frigate — the first European Aegis air-defence combatant, carrying 48 Mk 41 VLS cells and shaping a generation of allied frigate designs.
The US Navy's FREMM-derived next-generation frigate — intended as a 20-hull class to close the force-structure gap, cut to 2 half-built hulls when the program was canceled in November 2025 amid runaway redesign and cost growth.
The backbone of the U.S. surface fleet — a 9,500-ton multirole Aegis destroyer with 96 vertical launch cells, evolving from the SPY-1 to the SPY-6 radar, and the platform that fought the heaviest air-defense battles since World War II in the Red Sea.