SSGN Tactical Trident

SSGN Tactical Trident. The SSGN Tactical Trident is a strategic weapon system centered on the deployment of Tomahawk cruise missiles from converted Ohio-class submarines. This program transformed four nuclear ballistic missile submarines (SSBNs) into guided-missile submarines (SSGNs), providing the United States Navy with an unprecedented conventional and nuclear strike platform. The initiative represents a key evolution in undersea warfare and power projection following the Cold War.

Development and Background

The concept for the SSGN Tactical Trident emerged in the late 1990s as a strategic adaptation to post-Cold War realities. With the ratification of the START II treaty, the United States was obligated to reduce its deployed strategic nuclear warheads, rendering several Ohio-class submarine hulls excess to the SSBN force. Instead of decommissioning these vessels, the United States Navy and the Defense Advanced Research Projects Agency (DARPA) explored concepts for conventional strike missions. This period of strategic reassessment, influenced by conflicts like the Kosovo War, highlighted a demand for covert, long-range, precision strike capabilities. The program received formal approval during the tenure of Chief of Naval Operations Admiral Vern Clark and was championed by U.S. Strategic Command.

Design and Conversion

The conversion process was a massive engineering undertaking led by General Dynamics Electric Boat at facilities in Groton, Connecticut and Norfolk, Virginia. Each of the four submarines—the USS ''Ohio'', USS ''Michigan'', USS ''Florida'', and USS ''Georgia''—underwent a multi-year refueling overhaul and conversion. The original Trident II D5 ballistic missile tubes were reconfigured. Twenty-two of the twenty-four tubes were modified to house a new launch system capable of carrying up to seven Tomahawk missiles each in a Multiple All-Up-Round Canister (MAC). The remaining two tubes were converted to host special operations forces equipment, including a reconfigurable shelter for deploying Navy SEALs and their Swimmer Delivery Vehicles (SDVs). The submarines also received extensive communications and intelligence-gathering upgrades.

Armament and Payload

The primary armament of the SSGN is the BGM-109 Tomahawk, specifically the Block IV TLAM-E variant. Each converted Ohio-class submarine can carry a maximum of 154 Tomahawk missiles, giving the four-boat fleet a theoretical combined salvo of over 600 precision-guided munitions. The Tomahawks can be fitted with either a 1,000-pound class conventional unitary warhead or the nuclear-armed W80 warhead, though the latter is not currently deployed in this role. The missiles are guided by a combination of INS, GPS, and Digital Scene Matching Area Correlator (DSMAC), providing all-weather, day/night strike capability against fixed and relocatable targets. The secondary payload is the advanced special operations forces detachment, which can be launched and recovered while the submarine is submerged.

Operational History and Deployment

The first converted SSGN, the USS ''Ohio'', returned to the fleet in 2006, with the others following by 2008. These submarines have been continuously deployed to critical regions, operating from ports like Kings Bay and Apra Harbor. They have participated in major operations and exercises, including sustained strike operations during Operation Odyssey Dawn over Libya in 2011, where they launched Tomahawk missiles. Their deployments are often extended, sometimes exceeding 90 days submerged, and they routinely operate in areas such as the Persian Gulf, the Mediterranean Sea, and the Western Pacific. The SSGNs have also been integral to exercises like RIMPAC, demonstrating interoperability with allies such as the Japan Maritime Self-Defense Force.

Strategic Role and Capabilities

The SSGN Tactical Trident system provides the United States Navy with a unique combination of stealth, endurance, and massive conventional firepower. It serves as a critical component of the nation's conventional prompt global strike architecture, offering a survivable and persistent presence without reliance on forward basing or overflight permissions. This capability is central to the Air-Sea Battle concept and subsequent JAM-GC doctrine, designed to counter anti-access/area denial (A2/AD) strategies employed by potential adversaries like the PLA Navy. The platform's dual role as a missile magazine and a special operations insertion vehicle makes it a highly flexible instrument of national power, supporting commands from U.S. Central Command to U.S. Indo-Pacific Command.

Category:Submarine-launched cruise missiles of the United States Category:Cruise missiles Category:United States Navy submarine classes