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The Deep Trekker submersible drone camera, shown here in a water tower, can “fly” through water via remote-controlled thrusters and dive as deep as 500 feet.
About four years ago, the operator of a cogeneration plant in a medical center in Houston wanted to inspect the epoxy paint inside a massive 9 million-gallon, chilled-water storage tank. Only one problem: The logistics of moving the required equipment to the top of the tower,...
