Saab has officially proposed its Saab Lightweight Integrated Mast (SLIM) to the Indian Navy as a next-generation solution aimed at enhancing sensor integration, reducing radar signature, and optimizing warship top-deck layouts. This proposal aligns with India’s broader push toward advanced, network-centric naval platforms where sensor fusion and stealth are as vital as firepower.
Unlike conventional mast designs that distribute radars and antennas across the superstructure, SLIM consolidates all sensors into a single composite mast. Delivered as a fully integrated and pre-validated module, the system simplifies installation while ensuring coordinated and interference-free sensor performance.
The concept builds on Saab’s experience with the Visby-class corvette, known for its extensive use of carbon-fiber composites. SLIM adopts similar lightweight materials, reducing top weight and improving vessel stability and operational efficiency.
In addition to weight reduction, the composite structure lowers radar cross-section (RCS) by minimizing reflective surfaces and enabling streamlined shaping—an essential advantage in modern naval warfare where detectability is a critical factor.
A major strength of SLIM lies in Saab’s end-to-end integration model. The company oversees not only the mast structure but also sensor performance, electromagnetic compatibility, and installation interfaces. This turnkey approach minimizes integration risks and ensures seamless operation of radars, electronic warfare systems, and communication arrays in complex electromagnetic environments.
Designed for modularity and scalability, SLIM can be adapted across a wide range of platforms—from corvettes and frigates to larger combatants—making it suitable for multiple Indian Navy programs, including future builds and upgrades.
The system is already in operational use, notably on Finland’s Pohjanmaa-class corvette, and has been integrated into Sweden’s Gävle-class corvette upgrades. These implementations highlight how advanced sensor integration can significantly enhance combat capability without requiring new hulls.
For the Indian Navy, SLIM offers the potential to boost situational awareness, improve stealth, and streamline system integration—transforming the mast into a central node in modern, sensor-driven naval warfare.
