BALTIMORE - A barge that is part of the Vessel of Opportunity Skimming System is connected to the Coast Guard Cutter James Rankin as it conducts an annual training exercise in the Chesepeake Bay, April 14, 2010. The VOSS is used to skim the ocean surface to remove heavy oil in order to minimize environmental impact from an oil spill. U.S. Coast Guard photo by Petty Officer 3rd Class Walter Shinn.