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By Kris Osborn - President & Editor-In-Chief, Warrior Maven

(Washington, D.C.) The Navy plans to further upgrade, integrate and “fire-off” its SeaRAM ship defense deck-fired interceptor weapon now arming a wide range of its surface fleet.

The SeaRAM weapons system, designed to fire Rolling Airframe Missiles out of a Close-in-Weapons System, is now installed on many Navy ships to include destroyers, amphibs and of course the Navy’s Littoral Combat Ship. 

The SeaRAM provides an advantage to many Navy combatants due in large measure to its self-contained system, meaning it uses its own radar, software and sensors without needing to occupy other technologies or systems on the ship. 

This is particularly relevant in a smaller surface combatant such as an LCS, compared with a large destroyer armed with Vertical Launch Systems for larger interceptor missiles and a broader Aegis radar infrastructure.


The SeaRAM system builds upon the infrastructure and radar of the Close-in-Weapons-System (CIWS). CIWS' Phalanx weapon fires a 20mm cannon at close-in threats such as small boats. 

U.S Navy SeaRAM

SeaRAM fired from Arleigh Burke-class Guided Missile Destroyer

The SeaRAM is part of a layered ship-defense system designed to identify and destroy longer-range approaching enemy threats, such as anti-ship missiles, drones, small boats and helicopters.

The idea is to supplement and build upon the defensive power of the CIWS, an area weapon which fires multiple projectiles from a Phalanx gun system to destroy approaching air and surface threats; SeaRAM increases the envelope of attacking threats a ship can defend against and hits targets at farther ranges than CIWS. 


Navy officials have told The National Interest that they are very enthusiastic about SeaRAM, as it is the kind of weapon that enables ships to operate in a higher-threat environment. 

Raytheon weapons developers explain that the SeaRAM massively expands the defensive envelope of the ship, enabling a longer-range Rolling Airframe Missile beyond the capacities of a CIWS gun to track and destroy multiple targets simultaneously. 

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SeaRAM is an ability to destroy several approaching enemy attacks at one time, using an autonomous dual-mode passive radio frequency with infrared guidance, a Raytheon statement said.

The defensive envelope for SeaRAM is significant, as it can destroy cruise missiles, enemy drones and other surface threats such as approaching vessels or small boats, Navy weapons developers explain. 


SeaRAM fired during exercises in China Lake, California

One of the largest advantages of the weapon lies in its ability to operate an independent radar as part of a layered defense system to track and take-our targets from longer ranges with more precision and coordination.

Rolling Airframe Missile

The SeaRAM missile system replaces the CIWS area weapon with the Rolling Airframe Missile which fires from an 11-missile battery. The CIWS weapon, which has in recent years been upgraded by the Navy to incorporate surface as well as incoming air threats, shoots out 4,500 rounds per minute with a phalanx gun firing mini-projectiles.

Interestingly, a Navy weapons developer once explained to me that the SeaRAM integrates the accuracy and precision of the Rolling Airframe Missile with the maneuverability of the CIWS’ Phalanx’s high-resolution search and track sensors systems designed for rapid response. 

The RAM weapon is a versatile interceptor as it can fire from a SeaRAM or a Guided Missile Weapons System Mk 49 Launcher. The Mk 49 consists of a launcher and lightweight, fire-and-forget interceptor weapons.

Navy developers have been working on upgrading and refining launcher systems to expand the integration of SeaRAM missiles across the fleet. In recent years the Navy has begun arming forward-deployed destroyers with the emerging SeaRam weapon to track and potentially destroy attacking enemy missiles, drones, aircraft, small boats and other threats.

Navy officials have also said that SeaRAM could be integrated onto its now-in-development fleet of Constellation-class Frigates, although much of the exact weapons configuration of the Frigates has yet to be determined.

-- Kris Osborn is the President of Warrior Maven and The Defense Editor of The National Interest --

Kris Osborn is the defense editor for the National Interest. Osborn previously served at the Pentagon as a Highly Qualified Expert with the Office of the Assistant Secretary of the Army—Acquisition, Logistics & Technology. Osborn has also worked as an anchor and on-air military specialist at national TV networks. He has appeared as a guest military expert on Fox News, MSNBC, The Military Channel, and The History Channel. He also has a Master's Degree in Comparative Literature from Columbia University.