Petty Officer 3rd Class Benjamin Lassen holds a new dayboard in place as Charles Blackburn screws it to a piling on the St. Johns River, Jan. 14, 2015. Coast Guard Aids to Navigation Jacksonville is responsible for inspecting and maintaining approximately 1,100 different aids to navigation between Ossabaw Island, Ga. and Pons De Leon, Fla. (U.S. Coast Guard photo by Petty Officer 1st Class Stephen Lehmann)