The U.S. Marines Are Bringing Back World War II Crab Tanks
China already has them. Why does the U.S. need them? Simple: Take out the mines.
At dawn on June 6, 1944, the German troops defending the Normandy beaches glimpsed a terrifying sight.
Landing craft were disgorging M-4 Sherman tanks on the beaches. But these were no ordinary tanks: on their hulls were fitted rotating drums to which chains were attached. The chains flailed the beach, detonating any mines buried in the sand.
These were the legendary British “Crab” tanks of the 79th Armored Division, whose job it was to clear minefields. And now the U.S. Marine Corps is bringing back the Crabs, but with a twenty-first century twist.
The Crawling Remotely Operated Amphibious Breacher, or CRAB, will be a robot vehicle that will clear naval mines that threaten Marine amphibious assault troops. The Marines are developing CRAB as a “submersible, remote-autonomous system with front-end equipment—including a mine flail, tiller and rake—capable of breaching or proofing amphibious assault lanes for landing forces,” according to a Marine Corps news release.
“The robotic crawlers will splash into the water from a littoral utility craft and travel along the seafloor to remove explosive and nonexplosive obstacles from the assault lane. Each CRAB is intended to be expendable.”
The surf zone, where waves break onto shore, is a challenge for amphibious landings because turbulent water makes mine detection difficult. The Marines currently rely on the Assault Breacher Vehicle—an M1A1 tank chassis with a mine plow, and Mine Clearing Line Charges, which are rocket-fired lines festooned with explosives. Neither system is designed to operate in the surf zone.
“The CRAB system is important because currently, the Naval Force can only breach in the surf zone with significant risk to mission or personnel,” said Capt. Anthony Molnar, a project officer for Marine Corps Systems Command. “This would alleviate that by having an inexpensive and expendable piece of equipment going through there.”
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