Engineman Fireman Diego Mendez examines a Lubo purifier head tank during hourly checks of the main one engine room aboard amphibious dock landing ship USS Tortuga (LSD 46). Tortuga, commanded by Cmdr. John Barnett, is part of the only forward-deployed amphibious ready group and is currently operating in the 7th Fleet Area of Operations. (Photo by Mass Communication Specialist Seaman Chelsea Mandello)