Question: What does SEAL stand for in the military group that is part of the military branch that operates USS Dour?

<P0-S0> john walfrid nyquist (born february 11, 1933) is a retired a vice admiral in the united states navy. <P0-S1> he was born in san diego, california, the son of rear admiral nels walfrid nyquist and irma beske. <P0-S2> 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. <P0-S3> 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. <P0-S4> 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. <P0-S5> in retirement he worked for trex enterprises corporation, and is currently a defense consultant. <P0-S6> he resides in coronado, california, with his wife penelope ann lyon. <SEP> <P1-S0> These grew out of the last all-gun destroyers of the 1950s. <P1-S1> 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). <P1-S2> In the middle 1970s the s entered service, optimized for anti-submarine warfare. <P1-S3> 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. <SEP> <P2-S0> 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. <P2-S1> 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. <P2-S2> during that time and later, boesch set physical and operational standards at seal team two. <P2-S3> in 1987, he became senior enlisted advisor for united states special operations command. <P2-S4> 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. <P2-S5> after 45 years of continuous service, he retired from the navy in 1990 as a master chief petty officer. <SEP> <P3-S0> USS "Dour" (AM-223) was an built for the United States Navy during World War II. <P3-S1> She was awarded three battle stars for service in the Pacific during World War II. <P3-S2> She was decommissioned in March 1947 and placed in reserve. <P3-S3> While she remained in reserve, "Dour" was reclassified as MSF-223 in February 1955 but never reactivated. <P3-S4> In October 1962, she was sold to the Mexican Navy and renamed ARM "DM-16". <P3-S5> She was stricken from Mexican Navy service in 1986, but her ultimate fate is not reported in secondary sources. <SEP> <P4-S0> 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. <P4-S1> 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. <P4-S2> The SEALs are trained to operate in all environments (Sea, Air, and Land) for which they are named.