Nuclear Submarines USA: New Threats and Defenses Against Drones and Missiles

The Ukrainian underwater attack on Novorossiysk: a strategic turning point

On December 15, 2025, an unprecedented event shook the balance of underwater warfare: Ukraine announced that it had damaged a Russian submarine in the port of Novorossiysk using an underwater drone. This attack, which just a few years ago would have seemed like a scene from a spy novel, represents a strategic turning point in the ongoing conflict. The vulnerability of nuclear submarines in port or during surface transitions has suddenly become tangible, forcing navies around the world to review their defense strategies.

Quick Response

The new asymmetric threat: drones and improvised weapons

The vulnerability of ballistic submarines in transit or at port is not a new concept, but the emergence of accessible technologies such as underwater drones and portable anti-tank weapons has radically changed the threat landscape. According to a "Sources Sought" announcement published on the SAM.gov website, the U.S. Navy is seeking solutions to counter these new threats in all operational environments, from the open ocean to port channels.

Prototypal technologies for strategic defense

The U.S. Navy's announcement outlines 22 areas of focus to protect nuclear ballistic submarines (SSBNs) and supporting infrastructure. Among the most innovative technologies being sought are systems to detect, track, identify, and neutralize autonomous systems in all operational domains. Particular attention is paid to scalable solutions for coastal installations and operations in port, coastal waters, and river straits.

Stockpiles and protection during transitions

One of the most critical aspects concerns the protection of submarines during transitions between port and diving points. The Navy is seeking advanced technologies for maritime situational awareness, improvements in physical security for SSBN stockpiles, and systems to detect, avoid, and mitigate naval mines. Additionally, solutions are being sought to counter direct threats such as anti-tank guided missiles (ATGM) and rocket-propelled grenades (RPG) launched from the coast during transitions.

Protection of transport convoys

The threat is not limited to the submarines themselves but extends to the transport convoys that supply submarine bases. The Navy is interested in active protection systems - sensors and launchers similar to shotgun-mounted armored vehicles - to destroy incoming anti-tank rockets. These systems could be used to protect transport convoys of strategic weapons and equipment.

Robots and artificial intelligence in strategic defense

The announcement also includes requests for security robots, including Unmanned Surface Vehicles (USV) to patrol the waters, Unmanned Ground Vehicles (UGV) for perimeter control, and robotic inspection platforms that can integrate with existing response forces. Artificial intelligence emerges as both a threat and an opportunity, with the Navy seeking countermeasures to defeat autonomous swarms, disrupt AI-enabled ISR capabilities directed against nuclear installations, and strengthen strategic security networks against AI-guided cyber-physical attacks or spoofing.

Stealth as the best defense

Despite new defense technologies, the best protection for submarines remains undetectability. To this end, the Navy is seeking prototypal technologies to mitigate the generation, radiation, propagation, and dispersion of various types of signals associated with submarine and autonomous system operations, including both peacetime and wartime operations.

Geopolitical implications

The Ukrainian attack on the Russian submarine in Novorossiysk has demonstrated that even the most advanced navies can be vulnerable to relatively simple but effective technologies. This development could push nuclear powers to review their deterrence strategies, with possible consequences for global power balances. The international community should work to establish clear rules for the use of autonomous technologies in military contexts and to promote transparency in strategic defense capabilities. Only through a coordinated approach will it be possible to ensure strategic stability in a rapidly evolving world.

The future of defense technologies

The next decade will likely see unprecedented innovation in the field of strategic defense. Emerging technologies such as artificial intelligence, autonomous systems, and advanced materials are redefining the underwater battlefield. However, with these innovations come new ethical and operational challenges. Navies will need to balance the adoption of advanced technologies with the need to maintain strategic stability and prevent dangerous escalations. The balance between innovation and security will be crucial to ensuring a safe future for submarine forces and global stability.