SAN DIEGO, Calif. (Dec. 5, 2015) Sailors assigned to Coastal Riverine Squadron One aboard a 34-foot patrol boat perform boat crewman qualifications training in San Diego Bay during a drill weekend. The Coastal Riverine Force is a core Navy capability that provides port and harbor security, high-value asset protection and maritime security operations in coastal and inland waterways. (U.S. Navy photo by Aviation Electronics Technician 3rd Class Natalia Murillo/Released)