The Marlin Class underwater pump mining dredge manufactured by DSC Dredge is designed to meet the needs of deep mining and aggregate deposits by providing a more efficient tool for material excavation. Deep digging capability is made possible by the use of an underwater pump system with a high-torque cutter drive assembly. Digging depths range from 35 feet to more than 200 feet. Dredges are available in either a diesel- or electric-powered model. Drive systems include a Caterpillar ACERT diesel engine with inline direct marine-style transmission, or TEFC electric motor, variable-frequency AC dredge pump motor drive and double-helical gear reducer. All models feature a PLC operating system, magnetic flowmeter, electro-proportional hydraulic circuits, high-capacity service water system, suction dilution valves and a three-wire mooring system. 985/479-1355; www.dscdredge.com.