OVERVIEW: The 300mm SS-60 is an unguided, high-explosive artillery rocket designed for use with the Astros II multiple launch rocket system. It is intended for long-range strikes against enemy troop concentrations, infrastructure, and light fortifications.

DETAILS: The SS-60 is a 300mm solid-fueled artillery rocket developed by Brazil’s Avibras for integration with the Astros II MLRS platform. It features spin-stabilization and aerodynamic fins, providing effective range performance of approximately 60 km. The rocket is equipped with a high-explosive fragmentation warhead capable of delivering significant blast and fragmentation over a wide impact area. Launch and targeting are controlled by the Astros II’s fire control system, allowing rapid deployment and coordinated strikes.

The SS-60, also designated Sejil 60 in some export contexts, was among the first long-range rocket types produced for the Astros system. It offers a balance of payload weight and standoff distance, suited for conventional strike roles. Its warhead is optimized for use against enemy personnel, light armor, and static installations.

Rockets are stored in modular containers and loaded into the Astros launcher vehicle in pods. Mission data is input via onboard control interfaces before ripple or sequential launch. The SS-60 is typically used in pre-emptive bombardment or suppression fire to degrade enemy formations prior to maneuver force engagement.

NOTE:
IOC: Late 1980s
Operators: Brazil, Iraq, Malaysia, Saudi Arabia, Qatar, Indonesia
Platforms: Astros II
Conflict used in: Iran-Iraq War (1980–1988), Gulf War (1991)

SOURCE:
U.S. Air Force Armament Museum: https://www.nationalmuseum.af.mil ; Jane’s Weapons: Air-Launched ; Department of Defense: https://www.defense.gov, Historical Munition Fact Sheets ; Federation of American Scientists (FAS): https://fas.org ; U.S. Navy Weapon Systems Explosive Ordnance Disposal publication: https://www.navsea.navy.mil/Home/Warfare-Centers/NUWC-Newport/What-We-Do/Undersea-Warfare-Systems/Weapon-Systems/