After shakedown along the west coast, Mindoro sailed for the east coast late in January 1946 and arrived Norfolk, Va., 15 February. Assigned to Carrier Division 14, she began carrier air training operations along the east coast, and in May she joined ships of the 8th Fleet for exercises in waters of the West Indies. During the remainder of the year she ranged the Atlantic from New England to Cuba, training naval aviators and taking part in ASW hunter-killer exercises.