The United States Navy is spearheading a multinational drive to develop a next generation Evolved SeaSparrow missile capable of protecting allied warships from an increasingly dangerous mix of aerial threats.
The effort brings together 12 nations through the NATO SeaSparrow Project Office consortium.
According to a Navy Sources Sought notice, the consortium wants a SeaSparrow variant that can operate across participating fleets rather than remain tied to a single nation or platform.
Responses from interested contractors are due Oct. 19.
The proposed NSV SeaSparrow is expected to confront threats ranging from slow aircraft to high speed missiles diving toward ships.
The Navy said the weapon “should have capability against current and future threat classes spanning a variety of threat characteristics including velocity (low-speed to high-speed), altitude (sea skimming to high diver), maneuverability (non-maneuvering to high Gravitational (G)-Force maneuvers), and signatures.”
That broad requirement reflects the ugly reality facing modern naval forces, particularly as hostile powers invest heavily in drones, cruise missiles and sophisticated antiship weapons.
A fleet air defense system must now distinguish and destroy multiple threats approaching from different directions, altitudes and speeds.
The missile is also intended to help defend ships against massed salvos, a scenario designed to overwhelm limited interceptor inventories and shipboard sensors.
It must continue operating even when adversaries deploy electronic jamming or other countermeasures.
According to the notice, the weapon “should be able to work in complex natural, contested, Radio Frequency (RF), Electro-Optical (EO), and/or Infrared (IR) environments.”
In plain English, the missile cannot afford to become confused when the electromagnetic battlefield gets crowded and the enemy starts playing dirty.
“The missile should have the capability to discriminate and resolve between multiple closely spaced targets and provide threat-track measurements to support missile guidance, navigation and lethality functions,” the Sources Sought notice continues.
“The missile should have the capability to handle threat countermeasures.”
A graphic included with the notice illustrated just how demanding that mission could become.
It appeared to show surface ships, including two aircraft carriers, under attack from roughly a dozen missiles and torpedoes, along with a hostile fixed wing aircraft and helicopter.
Friendly warships in the graphic appeared to use active illumination against some incoming threats, while SeaSparrow missiles relied on onboard sensors to intercept others.
That combination could give commanders greater flexibility when facing saturation attacks instead of forcing every engagement through one vulnerable targeting method.
The consortium also wants a modular architecture that can be upgraded as threats evolve. It is seeking “maximum rights in technical data, computer software, and computer software documentation (including source code), design artifacts, and interface specifications.”
“This approach will simplify future upgrades, promote interoperability across consortium platforms, and outpace evolving threats,” the Navy notice said.
That emphasis should also prevent participating governments from becoming needlessly trapped by proprietary systems when rapid battlefield improvements are required.
Contractors are expected to offer a complete missile system, including the airframe, propulsion package, guidance equipment and software.
The missile can measure no more than 10 inches in diameter and must fit inside a Mark 41 vertical launch tube, preserving compatibility with widely fielded naval launch systems.
Technical information must be releasable across the full NATO SeaSparrow Consortium, which includes Australia, Belgium, Canada, Denmark, Germany, Greece, the Netherlands, Norway, Portugal, Spain, Turkey and the United States. Thailand and the United Arab Emirates also operate SeaSparrow weapons.
Raytheon currently manufactures the Block II RIM 162 Evolved SeaSparrow and doubled annual production to more than 350 missiles in 2025.
Demand is likely to remain strong as operations in the Persian Gulf burn through American and allied interceptor stocks while Iran launches missiles and drones.
The Evolved SeaSparrow entered service in 2004 but traces its lineage to the AIM 7 Sparrow radar guided air to air missile developed during the 1950s.
Although the original Sparrow posted mixed results during the Vietnam War, the modern naval version was designed as an affordable shield against antiship missiles, aircraft, helicopters and fast attack boats.
The current missile has an estimated range of about 30 miles, giving warships a vital short range defensive layer.
A more adaptable successor would strengthen allied fleets while helping the Navy stay ahead of adversaries betting that sheer numbers can punch through American sea power.
