Navy SEALs develop dry submersible mini-attack submarine

U.S. Special Operations Command and sub-maker Electric Boat have partnered up to develop a dry submersible mini-submarine designed to more safely and efficiently deliver Navy SEALs into hostile, high-threat areas beneath the surface of the ocean.

The 31-foot long underwater vehicle, called the User Operational Evaluation System 3, can carry as many as six people. It is currently being tested and developed through a three-year, $44 million U.S Special Operations Command, or SOCOM, firm-fixed-price design, build and deliver contract with Groton, Conn.-based General Dynamics Electric Boat.

US Navy photo

US Navy photo

USSOCOM has a long-term goal to develop an affordable dry combat submersible system that satisfies current SOF (Special Operations Forces) maritime mobility requirements,” a SOCOM spokesman said. “Combat submersibles are used for shallow water infiltration and exfiltration of special operations forces, reconnaissance, resupply, and other missions in high threat, non-permissive environments.”

The pressure hull and motor of the User Operational Evaluation System 3, or UOES 3, have already been built and have undergone key tests, Electric Boat officials said.  Engineering plans call for the inclusion of a standard suite of submersible navigation systems, gyroscopes, sonar and obstacle avoidance technology, according to mission systems and business development officials with General Dynamics Electric Boat.

General Dynamics

General Dynamics

The idea with the dry submersible is to minimize risk and fatigue for special operations forces, such as SEALs, who are adept at quietly swimming into hostile areas to complete high-risk missions.

“Right now when we deploy SEALs they typically go in what’s called a wet boat – so they are in the ocean breathing through scuba gear. What the SEALs really want is something where they can get the guys to their objective dry, so they don’t have to endure this harsh water environment,” an Electric Boat official said.

While SEALs are known for their training and long-distance swimming abilities, a dry submersible could lessen mission- fatigue and reduce their exposure to harsh elements such as cold or icy water.  Therefore, the UOES 3 would seem to be of particular value in cold or stormy waters given that it would protect them from the elements.

MARSOC-swim-raiders

US Navy photo

It is not yet clear whether the 19-ton dry submersible will be launched from a submarine or from a surface ship, however those questions are now being explored, SOCOM and Electric Boat officials said.

The dry submersible was slated to undergo developmental testing and early operational assessment through fiscal year 2015, Special Operations Command officials said.

The idea is to use UOES 3 progress as a “technology development” effort to prepare for what will become a more formal effort to build a dry semi-submersible for SEALs.

The UOES 3 is currently being built to commercial specifications through a partnership between General Dynamics Electric Boat and an Italian firm called Giunio Santi Engineering, or GSE, Electric Boat officials explained.  The idea behind using commercial specifications is to leverage the best and most cutting-edge existing technology while working to keep costs lower, he said.

050505-N-3093M-007 Atlantic Ocean (May 5, 2005) - Members of SEAL Delivery Vehicle Team Two (SDVT-2) prepare to launch one of the team's SEAL Delivery Vehicles (SDV) from the back of the Los Angeles-class attack submarine USS Philadelphia (SSN 690) on a training exercise. The SDVs are used to carry Navy SEALs from a submerged submarine to enemy targets while staying underwater and undetected. SDVT-2 is stationed at Naval Amphibious Base Little Creek, Va., and conducts operations throughout the Atlantic and Southern, and European command geographic areas of responsibility. U.S. Navy photo by Chief Photographer's Mate Andrew McKaskle (RELEASED)

U.S. Navy photo

Some of the navigational technology includes a sonar Doppler velocity log which bounces a signal off the bottom of the ocean to help provide essential mission-relevant location information, an Electric Boat official added.

“After bouncing off the bottom, a signal comes back to an array which tells you how far you are moving,” he said.

One analyst said such a technology could bring great advantage to the SEALs.

“It is sensible that they would want to deploy in the stealthiest way available. It is something that fits with the traditional missions of the SEALs,” said Benjamin Friedman, research fellow in homeland defense and security studies, Cato Institute, a Washington-based D.C. think tank.

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