paragraph_text: The SCDA O-1 was an Italian semi-rigid airship, the only true semi-rigid airship to serve with the United States Navy.

paragraph_text: HMS "Kent" was a batch-1 destroyer of the Royal Navy. She and her sisters were equipped with the Sea Slug Mk-1 medium-range surface-to-air missile SAM system, along with the short-range Sea Cat SAM, two twin 4.5-inch gun turrets, two single 20mm cannon, ASW torpedo tubes, and a platform and hangar that allowed her to operate one Wessex helicopter. The County class were large ships, with good seakeeping abilities and long range, and were ideal blue-water ships for their time.

paragraph_text: The two spark plugs in each cylinder can fire either sequentially or simultaneously, enabling more efficient burning during lean - burn mode and more often lean - burn operation. The engine can operate at a lean 22: 1 air - to - fuel ratio more than 60 percent of the time on a flat road. The VTEC cylinder idling system of the engine closes the valves in three of the four cylinders when the car is decelerating, reduces the power lost to the engine by 50 percent, and allows the IMA to extract more electrical energy during braking. The rocker arms operating the intake and exhaust valves have two modes: valve - lift mode or idle mode. They are engaged via a synchronizing piston. During deceleration, the synchro piston disengages the lift - mode rocker arm so that the valves remain at rest, effectively sealing off the cylinder.

paragraph_text: The Opening of the Fifth Seal (or The Fifth Seal of the Apocalypse or The Vision of Saint John) was painted in the last years of El Greco's life for a side-altar of the church of Saint John the Baptist outside the walls of Toledo. Before 1908 El Greco's painting was referred to as Profane Love. Cossio had doubts about the title and suggested the "Opening of the Fifth Seal". The Metropolitan Museum, where the painting is kept, comments: "the picture is unfinished and much damaged and abraded."

paragraph_text: "Looking Out for Number One" is a song co-written and recorded by American country music artist Travis Tritt. It was released in July 1993 as the fourth single from the album "T-R-O-U-B-L-E". The song reached number 11 on the "Billboard" Hot Country Singles & Tracks chart. The song was written by Tritt and Troy Seals.

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.

paragraph_text: This is a list of destroyer classes of the Royal Navy of the United Kingdom, organised chronologically by entry into service.

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.

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.

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.

paragraph_text: The Seal River is a river in the Northern Region of Manitoba, Canada. It travels from Shethanei Lake to the Hudson Bay. The river was nominated for the Canadian Heritage Rivers System in 1987 and was officially listed in 1992.

paragraph_text: Lost Seal Stream () is a glacial meltwater stream, long, draining from the west margin of Commonwealth Glacier into the northeast end of Lake Fryxell, in Taylor Valley, Victoria Land, Antarctica. The name was suggested by Diane McKnight, leader of a United States Geological Survey team that studied the hydrology of streams flowing into Lake Fryxell in several seasons, 1987–94, and commemorates the encounter with a living Weddell seal. The seal wandered into the area north of Lake Fryxell during November 1990 and was evacuated by helicopter to New Harbour after it entered the camp area. A mummified seal is prominent at the mouth of the stream.

paragraph_text: Holluschickie Bay () is a bay on the west coast of James Ross Island, Antarctica, entered between Matkah Point and Kotick Point. It was probably first seen by Otto Nordenskiöld in 1903. The bay was surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1945; the name arose during a subsequent visit by a FIDS party in 1952, when a large number of young seals was observed near the mouth of the bay, after the word used for the young seals in Rudyard Kipling's story "The White Seal" in "The Jungle Book".

paragraph_text: The California Golden Seals were a professional ice hockey club that competed in the National Hockey League (NHL) from 1967 to 1976. Initially named the California Seals, the team was renamed the Oakland Seals partway through the 1967–68 season (on December 8, 1967) and then to the California Golden Seals in 1970, after two games as the Bay Area Seals. 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. The Seals were never successful at the gate, qualifying for the postseason in only two of their nine seasons and failing to obtain a winning record in each, and eventually moved to Cleveland to become the Cleveland Barons in 1976. They are the only franchise from the 1967 expansion to not reach the Stanley Cup Finals.

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.

paragraph_text: P&O European Ferries (formerly Townsend Thoresen), a division of P&O Ferries, was a ferry company which operated in the English Channel from 1987 after the "Herald of Free Enterprise" disaster, when "Townsend Thoresen" was renamed "P&O European Ferries", until 1999 when the Portsmouth Operations became P&O Portsmouth and the Dover Operations were merged with Stena Line AB to make P&O Stena Line.

paragraph_text: United States v. Seale is a federal criminal case in the United States, in which Ku Klux Klan member James Ford Seale was prosecuted and convicted for his role in the racially motivated murders in 1964 of two black teens.

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.

paragraph_text: HMAS "Vendetta" was one of three "Daring" class destroyers built for and operated by the Royal Australian Navy (RAN). The destroyer was built by Williamstown Naval Dockyard and entered service in 1958. During her early career, "Vendetta" was deployed to the Far East Strategic Reserve on multiple occasions. In 1965 and 1966, the destroyer undertook deterrence patrols during the Indonesia-Malaysia Confrontation. Along with several runs escorting the troop transport to Vietnam, from late 1969 to early 1970 "Vendetta" was assigned to combat operations, and became the only Australian-built warship to serve in a shore bombardment role during the Vietnam War.

paragraph_text: P&O Portsmouth was the name for P&O European Ferries' Portsmouth operations from 1999 to 2002 when it was merged with the Dover Operations to become P&O Ferries.

Question: What does seal stand for in the branch of the U.S. military that operates a list of destroyer classes, as well as containing the rank O-1?
Answer: Sea, Air, and Land