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

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.  "Nokomis" was present during the Japanese attack on Pearl Harbor, December 7, 1941.  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.  It then left and helped beach the USS "Nevada", with  , and YT-153.  The beaching of the Nevada saved Pearl Harbor's mouth from being blocked.  After that the USS "Nokomis" fought fires and dewatered the battleship USS "California", for 3 days.  This effort made the "California" salvageable, to be recommissioned again later in the war.  "Nokomis" was also the last vessel to move the surviving YC-699 barge prior to the Japanese attack on Pearl Harbor.  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.  She was renamed "Sea Serpent" and served many years in the San Francisco Bay as a tug and fire boat.  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. <SEP>  She was named for Thomas Stowell Phelps, who was a Rear Admiral in the US Navy in 1884.  "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.  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. USS "Phelps" (DD-360) was a World War II-era "Porter"-class destroyer in the service of the United States Navy.  The cruise included good-will visits to Montevideo, Uruguay and Rio de Janeiro, Brazil. <SEP>  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. USS "Indianapolis" (CL/CA-35) was a "Portland"-class heavy cruiser of the United States Navy, named for the city of Indianapolis, Indiana. <SEP> Holly Ann Graf is a retired Captain in the United States Navy.  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.  She was the first woman to command a cruiser in the history of the U.S. Navy.  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).  Her personal decorations include the Legion of Merit and the Bronze Star, among others.  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."  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."