Crew members aboard the Coast Guard Cutter Joshua Appleby, home-ported in Sector St. Petersburg, Fla., conduct a "heat and beat" during an aids to navigation mission in the Tampa Bay on Jan. 6, 2014. A "heat and beat" is conducted when chain from a buoy needs to be replaced due to wear and tear from the ocean floor. (U.S. Coast Guard Photo by Petty Officer 3rd Class Ashley J. Johnson)
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