China's relentless cyber espionage campaign against the Pentagon has been one of the central reasons why that country's technological warfighting capabilities have aggressively matured over a relatively short period of time. In fact, we now see the fruits of their hacking operations on a daily basis via advanced 'indigenous' weapon systems, some which are now entering into operational service. But a previously unreported intrusion into a Navy contractor's computer network has provided the Chinese military with information on the service's electronic warfare and threat library, cryptographic radio systems used on submarines, specific sensor data, and detailed information on a previously undisclosed and fast-paced initiative to field a supersonic anti-ship missile onto American nuclear submarines dubbed Sea Dragon.

Over half a terabyte of information was stolen electronically from the contractor's computer systems at Naval Undersea Warfare Center in Rhode Island. The installation is a focal point for development and testing of new systems related to sub-surface combat. The contractor's network was not deemed classified but the information on it in its totality was of a highly classified nature according to the Washington Post, which broke the story.

NAVSEA NUWC in Newport Rhode Island.

The loss of the Navy's current electronic warfare library is especially troubling as that type of information is considered among the most sensitive data the Pentagon gathers and is critical to countering enemy defensive networks and allowing U.S. assets to survive in contested territory. This theft paired with information on sensor data that potentially collects that information is especially damning as the enemy can figure out not just what the Navy knows, but exactly how they have come to know it. Yet the news that the Navy is rapidly looking to field a submarine-launched anti-ship missile capable of supersonic speeds is the biggest revelation from this report. Not only that but it is supposedly a weapon already in existence that is being adapted for submarine use. Quite honestly, in a vacuum, it's good news that the Navy is working on such a capability. Giving U.S. nuclear submarines long-range anti-ship capabilities that they can use while operating where no ship can is a critical ability that should be obtained, but what weapon could this be? A shadowy cutting-edge weapons program Little is known about the Sea Dragon program, as the Washington Post points out:

"The Sea Dragon project is an initiative of a special Pentagon office stood up in 2012 to adapt existing U.S. military technologies to new applications. The Defense Department, citing classification levels, has released little information about Sea Dragon other than to say that it will introduce a “disruptive offensive capability” by “integrating an existing weapon system with an existing Navy platform.” The Pentagon has requested or used more than $300 million for the project since late 2015 and has said it plans to start underwater testing by September. ... The introduction of a supersonic anti-ship missile on U.S. Navy submarines would make it more difficult for Chinese warships to maneuver. It would also augment a suite of other anti-ship weapons that the U.S. military has been developing in recent years."

Pentagon budget documents show that Sea Dragon, which began in the 2015 fiscal year, was one of many programs that the secretive Strategic Capabilities Office has managed and is listed in a specific line item covering "Advanced Innovative Technologies." By the following fiscal cycle, this same set of funding also paid for work on land-based railguns, advanced conventional guns and ammo, advanced navigation systems, unspecified enhanced munitions and unmanned aerial vehicle payloads, and a naval drone swarm project called Sea Mob. In the 2016 fiscal year, the Sea Dragon program completed designs for an in-water test apparatus and the ejection body and its associated hardware, as well as successfully completed a test of the weapon system on land. Unfortunately, subsequent budget requests do not list further accomplishments for the program.



We do know that the Pentagon expected to start underwater static testing of some portion of the system, as well as begin planning for a "sea-based tactical demonstration," by the end of the 2018 fiscal year, which runs through Sept. 30, but its latest budget request for the 2019 fiscal year said that the new funds would go to continued planning for that live-fire test.



The Pentagon asked for nearly $150 million in total to support that work, as well finishing underwater static testing, building a sea-based launch support test site, and continued analysis of the conceptual kill chain associated with the weapon system. This is less than half of the money the U.S. military requested for Sea Dragon for the 2018 fiscal year, but the budget documents note that this was a product of cost savings they had achieved by buying extra long-lead time components in advance. We have talked regularly and at great lengths about China's increasing naval capabilities on virtually every level. We have also talked for years about America's lack of investment in anti-ship missile systems, which the Pentagon is now working hard to counteract. But there is no existing supersonic anti-ship cruise missile in America's inventory. Few close U.S. allies possess similar weapons either, with the focus being on low-observability, networking, advanced targeting capabilities and so on, not high-speed.

Russia, on the other hand, has focused for decades on developing supersonic and now even hypersonic anti-ship cruise missiles, which are seen as a major threat to American warships. China has also worked hard to independently perfect the anti-ship ballistic missile, with the medium-range DF-21D and a version of the intermediate-range DF-26 becoming one of some of the most potent anti-access threats to American Carrier Strike Groups operating in the Indo-Pacific Theater. So if no supersonic anti-ship cruise missiles exist in the Pentagon's inventory, or are even deep in development, what is this 'existing' weapon? Identifying the mystery weapon This weapon could be one of a number of concepts we identify below. But to start, a submarine-launched version of the SM-6 multi-role missile seems like the most conventional possibility. This is not a cruise missile, but the designation stated in the Washington Post's article could be just a due to the writer's lack of knowledge of existing weapon systems and their capabilities or just a misinterpretation of what is clearly a fairly opaque program.

Raytheon SM-6 test launch.

The SM-6, which you can read all about in this recent profile we published on it, can be launched from the Mark 41 Vertical Launch Systems found on American destroyers and cruisers. In its latest form, it is fully networked, allowing it to receive targeting data from a variety of platforms, including airborne, ground-based, or surface-based sensor nodes. This concept is called Cooperative Engagement Capability/Naval Integrated Fire Control CEC/NIFC and it is one of the most important concepts the sea-going force is trying to implement at this time.

USN

Although it was designed primarily as a surface-to-air weapon to be used against air-breathing threats and ballistic missiles during their terminal stage of flight, the SM-6 has an increasingly potent long-range anti-ship and a land-attack capability able to promptly strike targets over long distances. The fact that it flies at very high speeds on a ballistic-like track instead of a flat cruise missile like flight profile makes it especially hard for enemies to defend against. Most of America's nuclear fast attack submarines and all its guided missile submarines have 'strike length' vertical launch cells similar to the Mark 41 VLS, that are used to house BGM-109 Tomahawk cruise missiles.





USN Los Angles class USS Santa Fe (SSN-763) with her VLS doors open.

A new arrangement, with two large hatches that cover a number of launch tubes and can be more easily adapted to different weaponry, is now being fielded on latest Virginia class submarines. Soon boats equipped with the Virginia Payload Module, which carries four of these large modular missile bays, will be under construction. These same cells currently used for Tomahawk cruise missiles could be configured to house an altered SM-6-booster combination capable of launching the missile submerged without destroying the launch cell. If such an arrangement were developed and implemented, the variety and flexibility of firepower that America's submarine force would possess would greatly increase.

USN USS John Warner (SSN-785) shows off her modular launch tubes, she was the first of her kind to receive the new setup.