The U.S. Navy has received its 500th Evolved SeaSparrow Missile (ESSM) Block 2 from Raytheon, underscoring the interceptor’s growing role in allied naval defense.
ESSM Block 2 provides medium-range protection against air and surface threats, building on Block 1 with a dual-mode radar seeker, greater agility, and more adaptable guidance systems to counter advanced targets. Its 10-inch (25.4 cm) form factor remains unchanged, ensuring that ships can load four missiles per launcher cell without requiring major refits.
Oversight of the missile comes from the NATO SEASPARROW Consortium, the alliance’s oldest cooperative armament program, created in response to the 1967 missile strike that sank an Israeli destroyer. Today, the consortium consists of 12 nations—including the U.S., Canada, Australia, Turkey, and several European allies—who jointly fund, develop, and sustain the program.
The first ESSM reached fleets in 2002, with the more advanced Block 2 entering service in 2020. Compatible with Mk 41 vertical launchers and Mk 29 trainable launchers, the missile integrates seamlessly across a wide range of surface combatants. Its deployment extends beyond U.S. forces to allied vessels, including European platforms like the Royal Netherlands Navy’s De Zeven Provinciën-class frigates.
