Sailor Signals Two sailors guide a Navy landing craft air cushion onshore for simulated disaster relief training during UNITAS LX at Ilha da Marambia, Brazil, Aug. 27, 2019. UNITAS is the world's longest running annual exercise, bringing together military forces from 11 nations. SHARE: Download: Full Size (3.04 MB) Tags: Navy, Partnerships, UNITAS LX Credit: Marine Corps Cpl. Amy Phan VIRIN: 190827-M-OP674-105.JPG Photo Gallery