Question: The USS "Phelps" along with the cruiser "Chester", escorted a vessel that served as the flagship for the commander of what?

<P0-S0> Holly Ann Graf is a retired Captain in the United States Navy. <P0-S1>  Until January 2010 she was commanding officer of the "Ticonderoga"-class guided missile cruiser USS "Cowpens" (CG-63), a major surface combatant vessel of the fleet. <P0-S2>  She was the first woman to command a cruiser in the history of the U.S. Navy. <P0-S3>  Earlier, she had been the first woman in the U.S. Navy to command a destroyer when she served as skipper of the guided missile destroyer USS "Winston S. Churchill" (DDG-81). <P0-S4>  Her personal decorations include the Legion of Merit and the Bronze Star, among others. <P0-S5>  Graf was relieved of command for abusive behavior unbecoming of an officer and was featured in Time magazine that characterized her as a modern-day female "Captain Bligh." <P0-S6>  The US Navy forced Graf into early retirement in 2012, but allowed her to do so at her current rank of Captain and under "honorable circumstances." <SEP> <P1-S0>  She was named for Thomas Stowell Phelps, who was a Rear Admiral in the US Navy in 1884. <P1-S1>  "Phelps" was laid down 2 January 1934 by Bethlehem Shipbuilding Corporation's Fore River Shipyard, Quincy, Massachusetts; launched 18 July 1935; sponsored by Mrs. Richard A. Kearny; and commissioned 26 February 1936, Commander Albert H. Rooks in command. <P1-S2> USS "Phelps" (DD-360) was a World War II-era "Porter"-class destroyer in the service of the United States Navy. <P1-S3>  In November 1936 "Phelps", along with the cruiser "Chester", escorted the heavy cruiser "Indianapolis" carrying President Franklin D. Roosevelt to Buenos Aires, Argentina for the opening of the Inter-American Peace Conference of 1936. <P1-S4>  The cruise included good-will visits to Montevideo, Uruguay and Rio de Janeiro, Brazil. <SEP> <P2-S0>  The vessel served as the flagship for the commander of Scouting Force 1 for eight pre-war years, then as flagship for Admiral Raymond Spruance, in 1943 and 1944, while he commanded the Fifth Fleet in battles across the Central Pacific in World War II. <P2-S1> USS "Indianapolis" (CL/CA-35) was a "Portland"-class heavy cruiser of the United States Navy, named for the city of Indianapolis, Indiana. <SEP> <P3-S0> USS "Nokomis" (YT-142/YTB-142/YTM-142) was a Woban-class harbor tug built in Bremerton, Wash, and assigned to Pearl Harbor, Hawaii, in 1940. <P3-S1>  "Nokomis" was present during the Japanese attack on Pearl Harbor, December 7, 1941. <P3-S2>  She was the first vessel on scene at the USS "Arizona", and was called off by the officers on deck because of the imminent explosion of the battery below deck. <P3-S3>  It then left and helped beach the USS "Nevada", with  , and YT-153. <P3-S4>  The beaching of the Nevada saved Pearl Harbor's mouth from being blocked. <P3-S5>  After that the USS "Nokomis" fought fires and dewatered the battleship USS "California", for 3 days. <P3-S6>  This effort made the "California" salvageable, to be recommissioned again later in the war. <P3-S7>  "Nokomis" was also the last vessel to move the surviving YC-699 barge prior to the Japanese attack on Pearl Harbor. <P3-S8>  Post-war she continued serving Pearl Harbor ships until she was decommissioned in May 1973, and eventually sold for "scrap" to Crowley, in San Francisco. <P3-S9>  She was renamed "Sea Serpent" and served many years in the San Francisco Bay as a tug and fire boat. <P3-S10>  In 1989, after the Loma Prieta earthquake in the SF Bay area, "Nokomis" and "Hoga" (which had been serving the City of Oakland as a fireboat) fought fires alongside each other again.