Diehl to Study Integration of IRIS-T SLM Missile With German Frigate
The German Armed Forces Procurement Office has tasked Diehl Defence with a significant project: conducting a risk analysis for the integration of the IRIS-T SLM guided missile system onto the German Navy’s Class 125 (F125) frigates. This analysis is set to include an in-depth level 3 research and technology study, aiming to reach a technical readiness level of 6, which corresponds to the development of a system demonstrator. Notably, the integration will also consider existing land-based launchers, as emphasized by the procurement office.
The comprehensive study is structured into four distinct stages, ensuring a thorough examination of the integration process. The initial phase will focus on analyzing the operating conditions and necessary software interfaces for the missile system. Following this, the second stage will involve designing and delivering a mounting frame specifically for two land-based IRIS-T SLM launchers to be installed on an F125 frigate. The third stage will see the actual integration of the missile system with the vessel, culminating in the commissioning of the demonstrator and the implementation of a function chain verification.
Overview of the IRIS-T SLM System
The IRIS-T SLM is a surface-to-air variant of the well-known IRIS-T air-to-air guided missile, boasting an estimated operational range of 40 kilometers (approximately 25 miles). This advanced system was officially contracted for in-service use by the German military back in 2017 and achieved its initial operational capability with the German Air Force in September 2024. Originally designed for land-based deployment on trucks, the IRIS-T SLM has evolved to include a containerized version, enhancing its modularity and enabling deployment across various platforms.
Diehl Defence is currently working on a naval version of the IRIS-T SLM, which will be capable of launching missiles from the Mk 41 vertical launching system. This adaptation will further extend the operational versatility of the missile, allowing it to be effectively utilized in naval engagements and enhancing the overall capabilities of the German Navy.
The F125 Frigate Class
The F125 frigate class consists of four vessels, with the first commissioned in 2019 and the last entering service in 2022. These ships are designed for low to medium intensity maritime stabilization operations, including critical tasks such as maritime surveillance and tactical support for sea-to-land operations. However, the F125 frigates currently lack robust anti-air and anti-submarine warfare capabilities, making the integration of the IRIS-T SLM missile system a pivotal enhancement.
The lead ship of the class, Baden-Württemberg, is expected to undergo integration with the missile demonstrator during its scheduled maintenance at the shipyard, which is anticipated to begin at the end of the first quarter of 2025. Following successful tests, which are planned for late next year, the missile capability may be extended to all F125 vessels, significantly boosting their operational effectiveness.
