Navy pursues drone “ghost fleet” concept

The Navy envisions a fast-approaching scenario where land, air, surface and undersea drones can connect with one another and operate in a coordinated fashion.

The Navy is working to develop quickly a “ghost fleet” concept where multiple surface, air and undersea drones operate in a synchronized fashion to conduct a wide-range of combat missions without placing sailors and marines at risk.

“We want to have multiple systems teaming and working together, surface, air and undersea,” said Capt. Jon Rucker, program manager, Unmanned Maritime Systems, PEO LCS.

Rucker explained that the Pentagon and the Navy are advancing this drone-fleet concept to search and destroy mines, swarm and attack enemies, deliver supplies and conduct intelligence, reconnaissance and surveillance missions, among other things.

Swarms of small aerial drones, engineered with advanced computer algorithms, could coordinate with surface and undersea vehicles as part of an integrated mission, he explained.

As communications and networking technologies continue to evolve rapidly, drones will increasingly be able to function in a cross-domain capacity, meaning across air, sea, land and undersea operations.

Swarms of aerial drones could, for instance, detect an enemy surface vessel and relay information to unmanned surface vessels or undersea drones to investigate or even attack. All of this could operate in a combat environment with little or no human intervention.

Rucker explained that the Navy, and its Office of Naval Research (ONR), has been working closely with the Pentagon’s once-secret Strategic Capabilities Office (SCO) in an effort to fast-track this kind of technology into an operational service.

The Strategic Capabilities Office is a special DoD-level effort to harness, leverage and integrate near-term emerging technology for faster delivery to combatant commanders at war.

Much of this involves merging new platforms, weapons and technologies with existing systems in a way that both improves capability while circumventing a lengthy and often bureaucratic formal acquisition process, said Dr. William Roper, SCO Director.

 A key advantage of using remotely-controlled drone ships is that they can save sailors and marines from being exposed to enemy fire during an attack operation. In fact, Roper maintained that USV autonomy brings the potential of substantially advancing amphibious warfare tactics.

“This can greatly help expeditionary logistics for a ship that is standing off from the shore. Instead of having to use an amphib manned by a lot of people, you have an unmanned supply boat,” Roper explained.

Fast-moving USVs could indeed lower risk and increase efficiency for a large number of missions, including Intelligence, Surveillance and Reconnaissance (ISR), countermine operations, search and rescue, electronic warfare, supply and weapons transport and amphibious assaults.

Higher tech enemy sensors and longer range surface and land-fired weapons have drastically increased the vulnerability of approaching amphibious assault operations, making them more susceptible to enemy fire. As a result, the Navy and Marines have been evolving amphibious tactics to include more disaggregated approaches designed to spread out an approaching force, making it more difficult for enemy weapons to attack an advancing assault.

For example, the Iwo Jima attack in the Pacific during WWII, an historic amphibious assault, involved a group of Marines approaching enemy shores in close proximity to one another; weapons, Marines, equipment and attacking infantry all came ashore in rapid succession.

Modern threats, are changing amphibious tactics to succeed against more technological and lethal enemy weapons.    

“Instead of having to land as a single unit, they can now break out. There is safety in numbers and they can redistribute,” Roper explained.  

Without naming it specifically, Roper discussed the strategic significance of the “ghost fleet” concept. When it comes to offensive surface operations, unmanned boats could form a swarming of small attack craft designed to overwhelm and destroy enemy ships with gunfire, explosives or even small missiles.

Roper explained that this strategic and tactical trajectory is greatly enhanced by the possible use of USVs. The Navy’s current inventory includes ship-to-shore amphibious craft called Landing Craft Air Cushions, LCACs, and Landing Craft Utility Vehicles, LCUs; these platforms, now being upgraded by newer transport boats able to move faster and carry more payload (such as Abrams tanks), are manned and therefore involve the use of a crew.

The Office of Naval Research has demonstrated technological advances in autonomy with groups of swarming Unmanned Surface Vessels (USV) designed to detect enemy ships, perform surveillance missions or even launch attacks, service officials said.

Algorithms governing autonomous maritime navigation have progressed to the point where USVs can more effectively perceive and respond to their surrounding environment while in transit, said Robert Brizzolara, program manager, Sea Platforms and Weapons, ONR. 

During a “swarm” boat demonstration in the lower Chesapeake Bay last Fall, ONR-developed boats achieved a key milestone in the area of autonomous control.

“Unlike purely remote controlled boats, these boats are able to perceive their environment and plan their routes without human intervention. The role of the human is supervisory control,” Brizzolara said.

 A human at a control station, using a low bandwidth connection, can perform command and control functions without needing to actually drive the vessels.

 The demonstration used four USVs, working in tandem to perform a range of potential maritime combat operations. All four of the boats were able to see and sense a common picture for route planning, hazard avoidance and collision prevention, developers said.

“We are using a first-of-its-kind sophisticated perception engine which senses the presence of other vessels using a combination of sensors, radar, cameras and processing algorithms,”Brizzolara explained.

The ONR demonstration used 7-to-11 meter boats already in the Navy inventory as manned boats, and configured them with an autonomy “kit” enabling a range of unmanned mission possibilities.

The kits, called Control Architecture for Robotic Agent Command and Sensing, or CARACaS, are engineered to provide USVs with an ability to handle dynamic operational situations; this can include the execution of search patterns, harbor defenses, surveillance or even swarm boat attacks. Other possibilities among a wide range of uses include using autonomous USVs for supply and weapons transport, countermine operations, electronic warfare and amphibious operations.

 The USVs are programmed with sensors linked to an established database of known threats such as enemy boats; they are also linked to one another with an ability to detect, track and trail “unknown” boats, Brizzolara said.

The Navy and ONR are already immersed in the development of a variety of USVs, including a mine-detecting Unmanned Influence Sweep System, or UISS, for the Littoral Combat Ship. The UISS is carried by a Textron-developed Common Unmanned Surface Vehicle, or CUSV.

The CUSV, in development since before 2009, can travel for more than 20-hours carrying up to 4,000-pounds at speeds of up to 20-knots, Textron information states. Also, it is engineered to withstand waves up to 20-feet.

The UISS is engineered to find and detonate undersea mines in order to save sailors and manned vessels from a potentially deadly explosion.

The Navy’s UiSS will be towed behind the unmanned vehicle and will emit sounds and magnetic signatures that mimic a ship – setting off nearby mines that listen for passing ships, according to a report from the US Naval Institute.

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