A suction hose moves water pulled from the ocean to the tactical water purification system where the salt will be removed and it will pass through a series of filters making it safe to drink. U.S. Marines from 3rd Marine Logistics Group purified saltwater Feb. 10 to provide clean water to multinational participants at various locations throughout Thailand during exercise Cobra Gold 2013. Cobra Gold, in its 32nd iteration, is a multinational exercise that promotes regional prosperity, security and cooperation among partner militaries. 3rd MLG is part of III Marine Expeditionary Force.