USS "Hopping" (DE-155/APD-51), a "Buckley"-class destroyer escort of the United States Navy, was named in honor of Lieutenant Commander Hallsted L. Hopping, commanding officer of Scouting Six, embarked on the USS Enterprise, killed in action during the February 1, 1942 Marshall Islands Raid.
 LCDR Hopping was the first U.S. Navy aircraft squadron commander to lose his life in World War II.
USS "Enterprise" (CV-6), was the seventh U.S. Navy vessel to bear the name.
 Colloquially called "the Big E", she was the sixth aircraft carrier of the United States Navy.
 A "Yorktown"-class carrier, she was launched in 1936 and was one of only three American carriers commissioned before World War II to survive the war (the others being "Saratoga" and "Ranger" ).
 She participated in more major actions of the war against Japan than any other United States ship.
 These actions included the Attack on Pearl Harbor (18 dive bombers of VS-6 were over the harbor, 6 were shot down with a loss of eleven men, making her the only American Aircraft carrier with men at Pearl Harbor during the Attack and the first to receive casualties during the Pacific War), the Battle of Midway, the Battle of the Eastern Solomons, the Battle of the Santa Cruz Islands, various other air-sea engagements during the Guadalcanal Campaign, the Battle of the Philippine Sea, and the Battle of Leyte Gulf.
 "Enterprise" earned 20 battle stars, the most for any U.S. warship in World War II, and was the most decorated U.S. ship of World War II, She is also the first American ship to sink an enemy vessel during the Pacific War, the sole surviving pilot of the six planes shot down over Pearl Harbor sank Japanese submarine I-70 on 10 December 1941.
 On three occasions during the Pacific War, the Japanese announced that she had been sunk in battle, resulting in her being named "The Grey Ghost".
Jude Lakmal Wijethunge (Sinhalese: ජූඩ් ලක්මාල් විජේතුංග , died 30 March 1996), was a Lieutenant Commander in the Sri Lanka Navy.
 As a Lieutenant, he commanded the Dvora-class fast patrol boat P458 of the 4th Fast Attack Flotilla.
 He was posthumously awarded the Parama Weera Vibhushanaya, Sri Lanka's highest military award for gallantry, for his actions on 30 March 1996 in defending a Navy transport from a Sea Tiger attack.
 As part of an escort to the transport vessel, Wijethunge fought off repeated attacks until his craft had suffered severe damage including to its engines, and all his crew were incapacitated.
 Noticing a Sea Tiger suicide boat, Wijethunge maneuvered the P458 to intercept it causing the suicide boat to ram into his vessel.
 The resulting explosion destroyed both vessels, thereby saving the transport vessel which was the target of the suicide boat.
 Two members of his crew were later rescued from the waters.
 He was posthumously promoted to the rank of Lieutenant Commander in addition to receiving the Parama Weera Vibhushanaya, and is the first naval officer to receive the award.
USS "Ferret" was a two masted schooner, the third U.S. Navy vessel to bear this name, and was purchased 20 December 1822 at Baltimore, Maryland and commissioned early in 1823, with Lieutenant R. Henley in command.
 It was the first U.S. naval ship commanded by the famous naval hero David Farragut.
 "Ferret" served transporting U.S. sailors, marines and supplies to the pirate infested waters of the Caribbean and was used to search out and attack pirate ships and pirate strongholds for a little more than two years when her career was cut short when the vessel capsized in a gale force storm off the coast of Cuba.
Senior Officer Present Afloat, usually referred to as SOPA, is a U.S. Navy term to indicate the U.S. Navy officer, with the highest ranking by rank, or number in rank, present in a harbor occupied by more than one U.S. Navy vessel.
 That officer is essentially commander of all U.S. Navy operations afloat in the harbor and is responsible to civilian authorities for the action of the ships and the behavior of crews under his or her command.
USS "Pontoosuc " was a Union Navy vessel in the American Civil War.
 A side wheel gunboat, "Pontoosuc" was built under contract with G. W. Lawrence and the Portland Company, Portland, Maine, and was named for Pontoosuc, Illinois, on the Mississippi River.
 She was commissioned at Portland on 10 May 1864 with Lieutenant Commander George A. Stevens in command.
USS "Aylwin" (Destroyer No. 47/DD-47) was the lead ship of "Aylwin"-class destroyer s built for the United States Navy prior to the American entry into World War I.
 The ship was the second U.S. Navy vessel named in honor of John Cushing Aylwin, a U.S. Navy officer killed in action aboard "Constitution" during the War of 1812.
USS "Wainwright" (Destroyer No. 62/DD-62) was a "Tucker"-class destroyer built for the United States Navy prior to the American entry into World War I.
 The ship was the first U.S. Navy vessel named in honor of U.S. Navy officers Jonathan Wainwright, his cousin, Commander Richard Wainwright, and his son, Jonathan Wainwright, Jr..
USS "Hayter" (DE-212/APD-80), a "Buckley"-class destroyer escort of the United States Navy, was named in honor of Lieutenant Commander Hubert M. Hayter (1901–1942), who was killed in action, while serving aboard the cruiser USS "New Orleans" during the Battle of Tassafaronga on 30 November 1942.
 Lieutenant Commander Hayter was serving as damage control officer when "New Orleans" received a torpedo hit, and as Central Station, his battle post, filled with asphyxiating gas he ordered all men without masks to leave the compartment giving his own to a partially stricken seaman.
 After clearing the compartment of all personnel, Lt. Cmdr. Hayter was finally overcome by the fumes.
 For this extraordinary act of heroism he was posthumously awarded the Navy Cross.
USS "Concord" was a wooden-hulled, three-masted sloop-of-war of the United States Navy and was launched on 24 September 1828 from the Portsmouth Naval Shipyard in Kittery, Maine.
 She was the first US Navy vessel to bear the name 'Concord' and was so named after the town of Concord for its role at the beginning of the American Revolution.
 When empty, the vessel displaced a total of 700 tons.
 The "Concord" had a complement of 190 officers and seamen with an armament of 20 guns and saw service protecting American merchant ships and other interests in several places around the world.
 The ship and her crew, who also functioned as Marines, fought in the Seminole Wars in Florida.
 "Concord" ran aground while on a patrolling mission along the African coast.
 Despite determined efforts from the crew, with three losing their lives in the process, the "Concord" was unable to be refloated.
 It was the first ship christened by a woman.
 Sloop-of-war "Concord", launched in 1827, was "christened by a young lady of Portsmouth."
 This is the first known instance of a woman sponsoring a United States Navy vessel.
 Unfortunately, the contemporary account does not name this pioneer female sponsor (Ceremonial ship launching).

Question: What number of U.S. Navy Vessel held the USS Hopping after Lieutenant Commander Hallsted L. Hopping was killed in action? 
Answer: seventh