After a period of intensive training and preparation, she departed Majuro on 6 June for the invasion of the Marianas, a spectacular amphibious operation to be carried out nearly 1,000 miles (1,800 km) from the nearest advance base, Eniwetok. Again acting as screening ship for the carriers, "Healy" supported softening-up raids 11–15 June and protected them during the period of direct support as Admiral Richmond Kelly Turner's Marines went ashore on Saipan on 15 June.