Scientist Dr. Jeremy Wilkinson, Scottish Association for Marine Science, left, and ERDC-CRREL's Bill Burch prepare the submersible trolley for testing within CRREL's Geophysical Research Facility. Attached to the trolley's structure are a suite of sensors that includes cameras, lasers and sonars, in an attempt to detect and map an oil spill from under the ice.

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Photo by: U.S. Army Corps of Engineers |  VIRIN: 120229-A-FW529-001.JPG