Question: What does seal stand for in the U.S. military branch that operates a list of destroyer classes and the USS Stag?

Knowledge 1: List of destroyer classes of the United States Navy
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. [SEP] Knowledge 2: USS Stag (AW-1)
USS "Stag" (AW-1) was one of four water distilling ships built for the United States Navy during World War II. The lead ship of two in her class, she was named for a ruminant mammal belonging to the family Cervidae. [SEP] Knowledge 3: Seal Online
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.
Knowledge 1: List of destroyer classes of the United States Navy
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. [SEP] Knowledge 2: USS Stag (AW-1)
USS "Stag" (AW-1) was one of four water distilling ships built for the United States Navy during World War II. The lead ship of two in her class, she was named for a ruminant mammal belonging to the family Cervidae. [SEP] Knowledge 3: HMS Seal (1897)
HMS "Seal" was a B-class torpedo boat destroyer of the British Royal Navy. She was completed by Laird, Son & Company, Birkenhead, in 1897.
Knowledge 1: List of destroyer classes of the United States Navy
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. [SEP] Knowledge 2: Rudy Boesch
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. [SEP] Knowledge 3: United States Navy SEALs
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.

Answer: Sea, Air, and Land