United States Marine Corps off-base, except in transit to and from their place of duty and in the event of an emergency. As in any military organization, the official and unofficial traditions of the Marine Corps serve to reinforce camaraderie and set the service apart from others. The Corps' embrace of its rich culture and history is cited as a reason for its high "esprit de corps". The "Marines' Hymn" dates back to the 19th century and is the oldest official song in the United States armed forces. The Marine motto "Semper Fidelis" means "Always Faithful" in Latin, often appearing as "Semper Fi"; also
Organization of the United States Marine Corps of its officers from the United States Naval Academy and Navy Reserve Officer Training Corps (NROTC), which are partially staffed by Marines. Marine Corps drill instructors contribute to training naval officers in Officer Candidate School. Marine aviators are trained in the Naval Aviation training pipeline, and utilize naval-weapons and test-pilot schools. Currently, Navy aircraft carriers deploy with a Marine Hornet squadron alongside Navy squadrons. The Navy's Blue Angels flight team includes at least one Marine pilot and is supported by a Marine C-130 Hercules aircraft and crew. Since the Marines do not train chaplains or medical personnel, officers and enlisted