This is a list of United States Navy aircraft wings. The U.S. Navy first used the term "wing" to describe the level of command above its aircraft squadrons when it established five Patrol Wings in 1937. In 1938 it organized the squadrons flying from the five aircraft carriers in commission at the time into Carrier Air Groups. Those Carrier Air Groups are the forerunners of today's Carrier Air Wings. Today the U.S. Navy operates both Aircraft Carrier based Carrier Air Wings and land based Functional Wings and Type Wings. Carrier Air Wings are operational units made up of squadrons of different types of aircraft that deploy aboard aircraft carriers. The Navy's land based wings are organized either to perform a specific function (Functional Wings) or around a specific aircraft type (Type Wings). Patrol and Reconnaissance Wings, Test Wings and Training Wings are examples of functional wings, these wings may consist of a single type of aircraft or a variety of types needed to perform a wing's specific function. Type Wings consist of squadrons of a single type of aircraft, they are non-deploying "force providers" that provide combat ready squadrons or detachments to deploying Carrier Air Wings or to other Navy or joint forces. All Navy aircraft wings whether they are Carrier Air Wings or Land Based Type or Functional Wings are commanded by a Navy Captain, however; in the case of a Training Air Wing or Naval Test Wing a U.S. Marine Corps Colonel is sometimes assigned as commander as those wings conduct training or test and evaluation for both the U.S. Navy and the U.S. Marine Corps. Commanders of Carrier Air Wings are informally addressed as "CAG" which is a hold over from the previous designation (prior to 20 Dec 1963) of Carrier Air Wings as Carrier Air Groups and commanders of functional or type wings are addressed as "Commodore" which is a traditional Naval title for an officer exercising command over multiple units commanded by Commanding Officers (individual ships or aircraft squadrons)