Question: What does seal stand for in the seals of the service operating list of destroyer classes of the operator of USS Peril?

Knowledge 1: HMAS Vendetta (D08)
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. [SEP] Knowledge 2: List of destroyer classes of the Royal Navy
This is a list of destroyer classes of the Royal Navy of the United Kingdom, organised chronologically by entry into service. [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: USS Peril (AM-272)
USS "Peril" (AM-272) was an built for the United States Navy during World War II and in commission from 1944 to 1945. In 1945, she was transferred to the Soviet Union and after that served in the Soviet Navy as T-281. [SEP] Knowledge 2: 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 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: USS Peril (AM-272)
USS "Peril" (AM-272) was an built for the United States Navy during World War II and in commission from 1944 to 1945. In 1945, she was transferred to the Soviet Union and after that served in the Soviet Navy as T-281. [SEP] Knowledge 2: 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. [SEP] Knowledge 3: HMAS Vendetta (D08)
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.

Answer: Sea, Air, and Land