U.S. Marines with Battlefield Surveillance Company, 2nd Intelligence Battalion, and U.S. Coast Guardsmen boat through channels and survey the water off the coast of Oak Island, N.C., Aug. 31, 2016. The Marines teamed up with U.S. Coast Guardsmen at USCG Station Oak Island, N.C., to create a topographical layout of waterways that were previously unidentifiable. The new maps will correct navigation discrepancies such as off-station buoys or extinguished lights. (U.S. Marine Corps photo by Cpl. Kaitlyn V. Klein) - U.S. Marines with Battlefield Surveillance Company, 2nd Intelligence Battalion, and U.S. Coast Guardsmen boat through channels and survey the water off the coast of Oak Island, N.C., Aug. 31, 2016. The Marines teamed up with U.S. Coast Guardsmen at USCG Station Oak Island, N.C., to create a topographical layout of waterways that were previously unidentifiable. The new maps will correct navigation discrepancies such as off-station buoys or extinguished lights. (U.S. Marine Corps photo by Cpl. Kaitlyn V. Klein)