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slc web Stolen 49 Ton Caterpillar D9 Located With VideoRay Pro 3 GTO ROV

On Friday September 3, 2010 the St. Louis County Minnesota Volunteer Rescue Squad was called in to assist the City of Virginia, Minnesota Police Department in locating a stolen Caterpillar D9 track-type bulldozer tractor.

The City of Virginia Police Department observed an oil slick on the water surface of a mine pit along with disturbed brush leading down to the water some 300 feet below ground level. Concerned that the driver may have been trapped in the equipment, they requested assistance from the St. Louis County Sheriff Volunteer Rescue Squad to investigate slick with their underwater experience and technology. This could have been done by divers except it would have been next to impossible to transport heavy dive gear down the steep cliff.

After arriving at the mine pit and evaluating the scene, SLC Volunteer Rescue Squad Captain Tom Crossmon called in his High Level Team to transport the ROV and its tether down the steep rocky face to the water surface. Because the ROV only weighs 10 pounds, team members were able to rig the VideoRay submersible and tether to their bodies while belaying down the face. Simply lowering the ROV by its tether would not have been possible due to the thick brush that was necessary to negotiate, and transporting larger “Mini ROVs” down the face would have made the trip down extremely dangerous for team members due to the vehicle’s size and weight.

Crossmon operated the VideoRay Pro 3 GTO ROV from the squad’s mobile command vehicle with 630 feet of neutrally buoyant modular VideoRay tether, located the oil slick on the surface, submerged and then positively identified the Caterpillar D9 within minutes at a depth of 20 feet. The rescue squad performed a pattern search around the machine for any sign of the driver and did not find anything.

“Having such a portable and lightweight ROV like the VideoRay was essential to getting down the 300 foot cliff to the water surface and then identifying the D9 so quickly underwater” said Crossmon.

The St. Louis County Volunteer Rescue Squad have been operating VideoRay ROVs for 8 years in northern Minnesota – often under ice – and have located several snowmobiles, vehicles, and drowning victims.

Read About More St. Louis County Volunteer Rescue Squad ROV Operations Here

SLC Rescue Squad


SLC Rescue Squad member prepares their VideoRay Pro 3 GTO ROV for the 300 foot decent to the water surface. Photo: Tom Crossmon

SLC Rescue Squad


Negotiating the steep brush covered face with the ROV strapped to a SLC Rescue Squad Team Member . Photo: Tom Crossmon

SLC Rescue Squad


The water filled mine pit from 300 feet above where the CAT D9 was located and identified. Photo: Tom Crossmon

VideoRay Still Image


Still image from the VideoRay video depicting the “ERP” in “CATERPILLAR”. Video Still: Tom Crossmon

CAT D9


The missing Caterpillar D9 when it was above water. Photo: Tom Crossmon

About VideoRay:

VideoRay introduced its first ROV in 2000 and has since become the world’s largest volume producer of underwater ROVs. VideoRay underwater robots help prevent terrorism, find and retrieve objects, inspect infrastructure both inland and offshore, and keep divers safe from hazardous conditions. As VideoRay innovates with new designs and functions, our ROVs assist in increasingly challenging situations and environments, and owners have learned to trust them to perform in more demanding missions. The hallmark of VideoRay systems are ruggedness, reliability, portability, and easy customization with the widest range of sensors and tools available for observation class vehicles.