Washington has cleared a $1.7 billion arms sale to Spain to support a comprehensive mid-life modernization of the Spanish Navy’s F100-class frigates, according to a US State Department announcement. The program targets five frontline warships, ensuring their continued relevance in NATO naval operations well into the coming decades.
The upgrade package features advanced combat and sensor systems, including Aegis weapon systems, digital signal processors, Mk 41 Baseline VIII vertical launch systems, and new surface search radars. It also includes a wide range of supporting equipment and services such as satellite communications, munitions, torpedo and gun systems, mission software, spare parts, logistics support, and specialized training, all aimed at strengthening Spain’s integrated air defense architecture.
Implementation will involve leading US defense firms Lockheed Martin, Ultra Maritime, and General Dynamics, working alongside Spanish counterparts. The agreement allows for the temporary deployment of US government and contractor personnel to oversee system integration, conduct technical evaluations, and support workforce competency development. Previous program assessments indicate the modernization will keep the frigates operational through at least 2045.
Known as the Álvaro de Bazán-class, the F100 frigates are 147 meters long and displace a multi-role combat load capable of supporting air, surface, and undersea warfare. Their armament includes naval guns, close-in defense systems, machine guns, autocannons, guided missiles, and torpedoes. The ships can operate an SH-60 Seahawk-sized helicopter and accommodate roughly 200 crew members. Powered by a combined gas turbine and diesel propulsion system, the frigates achieve speeds of 28 knots and ranges exceeding 4,500 nautical miles, making them key assets in Spain’s and NATO’s maritime defense posture.
