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Research Vessel Lake Explorer
The Research Vessel Lake Explorer provides state-of-the-art research capabilities to monitor and assess the health of the Great Lakes and determine the effects of pollution and natural and human-caused disturbances. The vessel is an integral part of EPA's research operations in Duluth and is operated by a three-person crew and can accommodate a scientific staff of seven.
 Research Vessel Lake Explorer
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This 82-ft-long, 18-ft-wide vessel is powered by twin 900-hp diesel engines, two five-blade propellers, and twin 50-kW generators. With a maximum cruising speed of 18 knots and an range of 925 nautical miles, the ship has an economic cruising speed of 12.5 knots.
The Lake Explorer's research capabilities include: Global Positioning System navigation; deck crane and stern A-frame with hydrographic tow winch to collect samples; suite of electronic sensors for water quality and biological profiling; sonar equipment to characterize lake bottoms; other sampling and collection gear; and an on-deck laboratory. An Optical Plankton Counter is used to measure the real-time distribution and nature of small animal and plant communities as it is towed behind the vessel and oscillated up and down through the water.