A capability enabling the M142 High Mobility Artillery Rocket System (HIMARS) to launch Army Tactical Missile System (ATACMS) from US naval ships is paving the way for future improvements.

The Sea Launched ATACMS from Shipboard HIMARS, referred to as "SLASH" or "HIMARS Afloat," integrates the proven precision of the M142 HIMARS with the versatility of shipboard deployment, enabling rapid, long-range missile strikes from maritime platforms.

HIMARS, a missile launcher mounted on a five-ton truck, can launch ATACMS missiles, which have a range of roughly 300km.

In October 2017, SLASH proved itself when Marines fired a HIMARS on the flight deck of the San Antonio-class amphibious transport dock ship USS Anchorage.

Since then, the development of SLASH has encouraged improvements in software modifications and development for HIMARS.

Since SLASH, engineers have adopted an open system architecture for HIMARS launcher software. This redesign improves system flexibility and integration, enabling HIMARS to support a broader range of multi-domain operations.

The redesign came about after the launcher software data rights transitioned from a contractor to the government in 2018.

Now the US Army Combat Capabilities Development Command Aviation and Missile Center (DEVCOM AvMC) works on the software.

Enhanced mobility

SLASH's ability to operate without specific ship modifications enhances the flexibility of HIMARS, which has roll-on, roll-off capability for rapid loading and unloading aboard ships.

The advancements from SLASH have extended the potential operational reach of naval vessels within the US Central Command (CENTCOM) area of responsibility.

SLASH allows US forces to engage adversary targets from a safe distance at sea, enhancing operational flexibility and range and reducing risk to personnel and assets.

The enhanced mobility and rapid deployment capabilities enable kinetic engagement of time-sensitive targets, in particular potential ballistic missile launch sites in the region.

This strategic flexibility is crucial for addressing the diverse and dynamic threat landscape present in CENTCOM's jurisdiction.

With the ATACMS' range of 300km, US joint forces could conduct high-volume, continual strikes in key locations including the Red Sea, Bab al-Mandeb strait, Gulf of Oman, Strait of Hormuz and Arabian Gulf.

By positioning these traditionally ground-based systems on a ship, the US military extends its operational range and hones joint forces' competitive edge.