What carrier did the ship whose mast is in The Eastern Promenade support during the initial phase of the Guadalcanal Campaign?
Eastern Promenade:  The Promenade is home to many historical sites, including a mass grave and the mast of the "USS Portland" USS Portland (CA-33):  She then supported the carrier "Enterprise" during the initial phase of the Guadalcanal Campaign later that year, and was torpedoed during the Naval Battle of Guadalcanal.
Enterprise