A three-day exercise testing the U.S. Coast Guard's ability to contain oil spills on large freshwater waterways is scheduled to wrap up today near St. Ignace.
The weather has been ideal, with a wintry blast creating the icy, unpleasant conditions Coast Guard officials wanted.
"It's very necessary to make sure that we're ready to respond in case something does happen," George Degener, a Coast Guard spokesman said.
Search efforts continue for two swimmers who were caught up Tuesday in rip currents off the coast of Saugatuck. Lake Michigan’s eastern shore has seen strong rip currents this week.
U.S. Coast Guard petty officer Lauren Jorgenson says people swimming in the Great Lakes should be aware of the danger of currents that can pull swimmers away from the beach.