Four-Minute Float Marine Corps recruits prepare to execute the four-minute float during basic swim qualification at Marine Corps Recruit Depot Parris Island, S.C. Jan. 13, 2021. SHARE IMAGE: Download Image: Full Size (0.34 MB) Tags: Marine Corps, Training Photo By: Marine Corps Lance Cpl. Samuel Fletcher VIRIN: 210113-M-LS844-1041C.JPG Photo Gallery