The U.S. Navy Is Getting a New Robot Anti-Mine Submarine The Knifefish will be paired with the Littoral Combat Ship. by Caleb Larson

The program aims to keep U.S. Navy ships safe from mines by replacing mammals with machines.

The Knifefish is a “medium-class Mine Countermeasure (MCM) Unmanned Undersea Vehicle (UUV) designed for deployment off the Littoral Combat Ship (LCS),” and is essentially an anti-naval mine drone. According to General Dynamics, the Knifefish “provides the mine warfare commander with enhanced mine-hunting capability by detecting, classifying and identifying both buried mines and mines in high clutter environments.”

Unlike some other underwater autonomous vehicles, the Knifefish does not tow a sonar, but has a sonar built into its body, significantly streamlining the design and increasing range and endurance. 

The Knifefish system uses low-frequency sonar in tandem with target recognition software to identify underwater targets. The Knifefish system is designed to essentially act as a sensor extension of its mother ship, allowing the ship to stay behind the Knifefish, away from minefields and out of harm’s way.

The Knifefish is intended to operate alongside the Navy’s Littoral Combat Ship system. Though facing many woes, among them early retirement, the LCS ships would gain a potentially powerful new arrow in their mission profile quiver with the addition of the Knifefish anti-mine program.

The Navy lauds the program’s modularity. They state, “Knifefish’s common open systems architecture design and modularity allow for platform flexibility and quick reconfiguration of the mission package to respond to evolving and dynamic mission requirements.” The platform can essentially be “retrained” by updating its software to identify new mine threats as they arise. “Planned block upgrades will improve its sensors and automated target recognition software to keep pace with mine threats.”

Marine Mammal Program

You don’t have to catch it, you don’t have to train it, and you don’t have to feed it—unlike the animals in the Navy’s Marine Mammal Program.

Although the Marine Mammal Program has used a wide range of animals at different times—including various seals, species of dolphins, and small whales—the two animals that are primarily trained are California sea lions and bottlenose dolphins.

The animals are primarily used for identifying and marking underwater naval mines, but they’ve also been trained for use in recovery operations and as underwater harbor sentries. These missions could also be done by robots—robots who need only an occasional battery refill.

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