Senior Chief Petty Officer James Holston, officer in charge of Coast Guard Cutter Kanawha, gives an overview of the cutter's mission as the crew of the Kanawha begin their journey down the Arkansas River to service aids to navigation along the Mississippi, White and Arkansas Rivers for the week, Nov. 16, 2015. The Kanawha crew is responsible for more than 150 miles of river, which helps ensures the safe transit of mariners carrying more than $4,000,000,000 of annual commerce along America's waterways. U.S. Coast Guard video by Petty Office 2nd Class Jonathan Lally.