150204-N-ZE250-074 GUANTANAMO BAY, Cuba - Senior Chief Sonar Technician Tom Chavez inspects a surface vessel torpedo tube on the aft missile deck of Arleigh-Burke Class Guided Missile Destroyer USS Jason Dunham while in port in Guantanamo Bay Feb. 4. USS Jason Dunham is currently underway in support of Operation Martillo, a joint operation with the U.S. Coast Guard and partner nations, within the 4th Fleet area of responsibility.