PINE BLUFF, Ark. -- Crewmembers aboard the U.S. Coast Guard Cutter Kanawha, an inland river tender, release a drop board to set a buoy in the Mississippi River here Monday, Dec. 18, 2006. River buoys must be set in the correct position to ensure vessel traffic has the safest river channel to transit. U.S. Coast Guard photograph by Petty Officer 3rd Class Thomas M. Blue