Question: What does SEAL stand for in the branch of military that operates USS Mahan?

Context paragraphs:
paragraph_text: The Navy needed to determine its role within the special operations arena. In March 1961, Admiral Arleigh Burke, the Chief of Naval Operations, recommended the establishment of guerrilla and counter-guerrilla units. These units would be able to operate from sea, air or land. This was the beginning of the Navy SEALs. All SEALs came from the Navy's Underwater Demolition Teams, who had already gained extensive experience in commando warfare in Korea; however, the Underwater Demolition Teams were still necessary to the Navy's amphibious force.
title: United States Navy SEALs
paragraph_text: After two years, a website was created for Seal Online. It had a post announcing the arrival of Seal Online in English to the United States. The English Seal Online was finally released on 19 November 2007 at 8pm EST by YNK Interactive.
title: Seal Online
paragraph_text: HMS "Seal" was a B-class torpedo boat destroyer of the British Royal Navy. She was completed by Laird, Son & Company, Birkenhead, in 1897.
title: HMS Seal (1897)
paragraph_text: USS "Watts" (DD-567) was a "Fletcher"-class destroyer of the United States Navy. It was named for Captain John Watts ("ca."1778–1823), who fought French privateers during the Quasi-War with France.
title: USS Watts (DD-567)
paragraph_text: Boesch was born and raised in Rochester, New York, and enlisted in the United States Navy at age 17. He became a Underwater Demolition Team (UDT) Frogman in 1951, serving on two UDT Teams. He was chosen as one of the first SEALs, becoming Chief of the Boat of newly created SEAL Team TWO in 1962. Starting in 1968 and 1970, Boesch completed two combat deployments during the Vietnam War, where he earned the Bronze Star for heroic action. During that time and later, Boesch set physical and operational standards at SEAL Team TWO. In 1987, he became Senior Enlisted Advisor for United States Special Operations Command. Designated the "Bullfrog", the longest-serving SEAL still on active duty, Boesch achieved considerable renown within the force for his physical fitness training regimens and his military appearance. After 45 years of continuous service, he retired from the Navy in 1990 as a Master Chief Petty Officer.
title: Rudy Boesch
paragraph_text: The third USS "Macdonough" (DD-351) was a "Farragut"-class destroyer in the United States Navy during World War II. She was named for Thomas Macdonough.
title: USS Macdonough (DD-351)
paragraph_text: USS "Catbird" (AM-68) was the lead ship of her class of two naval trawlers, which were operated as minesweepers by the United States Navy during World War II.
title: USS Catbird (AM-68)
paragraph_text: USS "Goff" (DD-247) was a "Clemson"-class destroyer in the United States Navy during World War II. She was named for Secretary of the Navy Nathan Goff, Jr.
title: USS Goff (DD-247)
paragraph_text: USS "MacLeish" (DD-220/AG-87) was a "Clemson"-class destroyer in the United States Navy during World War II. She was named for Lieutenant Kenneth MacLeish.
title: USS MacLeish (DD-220)
paragraph_text: USS "Pegasus" (PHM-1) was the lead ship of her class of hydrofoils operated by the United States Navy. "Pegasus" class vessels were designed for high speed and mobility, and carried a powerful armament for their size.
title: USS Pegasus (PHM-1)
paragraph_text: USS "Kane" (DD-235/APD-18) was a "Clemson"-class destroyer in the United States Navy during World War II. She was the first ship named for Elisha Kent Kane.
title: USS Kane (DD-235)
paragraph_text: USS "Mahan" (DLG-11/DDG-42), was a guided missile destroyer in the United States Navy. She was named for Rear Admiral Alfred Thayer Mahan USN (1840–1914). The ship was Laid down as DLG-11 by the San Francisco Naval Shipyard on 31 July 1957 and launched on 7 October 1959. "Mahan" was sponsored by Mrs. H. P. Smith, wife of Vice Adm. Harold Page Smith, and commissioned on 25 December 1960. "Mahan" was reclassified as a guided missile destroyer on 30 June 1975 and designated DDG-42. USS "Mahan" was decommissioned on 15 June 1993 and stricken from the Naval Vessel Register on the same day.
title: USS Mahan (DDG-42)
paragraph_text: The California Golden Seals were a team in the National Hockey League (NHL) from 1967 to 1976. Initially named California Seals, the team was renamed Oakland Seals partway through the 1967 -- 68 season (on December 8, 1967), and then to California Golden Seals in 1970. The Seals were one of six teams added to the league as part of the 1967 NHL expansion. Based in Oakland, California, they played their home games at the Oakland -- Alameda County Coliseum Arena. However, the Seals were never successful at the gate, and eventually moved to Cleveland to become the Cleveland Barons in 1976.
title: California Golden Seals
paragraph_text: USS "Kilty" (DD–137) was a "Wickes"-class destroyer in the United States Navy. She was the first ship named for Admiral Augustus Kilty.
title: USS Kilty (DD-137)
paragraph_text: USS "Brownson" (DD-868), a "Gearing"-class destroyer, was the second ship of the United States Navy to be named for Rear Admiral Willard H. Brownson, USN (1845–1935).
title: USS Brownson (DD-868)
paragraph_text: The first major warship produced by the U.S. Navy after World War II (and in the Cold War) were "frigates"—the ships were originally designated destroyer leaders but reclassified in 1975 as guided missile cruisers (except the became guided missile destroyers). These grew out of the last all-gun destroyers of the 1950s. In the middle 1970s the s entered service, optimized for anti-submarine warfare. A special class of guided missile destroyers was produced for the Shah of Iran, but due to the Iranian Revolution these ships could not be delivered and were added to the U.S. Navy.
title: List of destroyer classes of the United States Navy
paragraph_text: John Walfrid Nyquist (born February 11, 1933) is a retired a vice admiral in the United States Navy. He was born in San Diego, California, the son of rear admiral Nels Walfrid Nyquist and Irma Beske. He attended the University of Minnesota and United States Naval Academy, graduating from the latter in 1955. He is a former commander of Destroyer Squadron 26, Destroyer Squadron 20, USS "Semmes" (DDG-18) and Cruiser-Destroyer Group Five. He also worked in the Office of the Chief of Naval Operations as Assistant Deputy Chief of Naval Operations, Surface Warfare, and Assistant Chief of Naval Operations, Surface Warfare. He retired in 1991. His awards include the Distinguished Service Medal, the Legion of Merit, the Bronze Star, the Meritorious Service Medal, the Navy Commendation Medal two Meritorious Unit Commendations. In retirement he worked for Trex Enterprises Corporation, and is currently a defense consultant. He resides in Coronado, California, with his wife Penelope Ann Lyon.
title: John W. Nyquist
paragraph_text: USS "Rhodes" (DE-384) was an "Edsall"-class destroyer escort built for the United States Navy during World War II. She served in the Atlantic Ocean and the Pacific Ocean and provided destroyer escort protection against submarine and air attack for Navy vessels and convoys. Post-war she served the Navy as a radar picket ship.
title: USS Rhodes (DE-384)
paragraph_text: The United States Navy's ``Sea, Air, and Land ''Teams, commonly abbreviated as the Navy SEALs, are the U.S. Navy's primary special operations force and a component of the Naval Special Warfare Command. Among the SEALs' main functions are conducting small - unit maritime military operations that originate from, and return to, a river, ocean, swamp, delta, or coastline. The SEALs are trained to operate in all environments (Sea, Air, and Land) for which they are named.
title: United States Navy SEALs
paragraph_text: USS "Daly" (DD-519), a "Fletcher"-class destroyer, was a ship of the United States Navy named for Marine Sergeant Major Daniel Daly, (1873–1937), one of the very few people to be twice awarded the Medal of Honor.
title: USS Daly (DD-519)

Reasoning steps:
USS Mahan >> operator >>>> United States Navy
list of destroyer classes of United States Navy >> operator >>>> U.S. Navy
what does seal stand for in U.S. Navy seals >>>> Sea, Air, and Land

Answer: spans: Sea, Air, and Land