The Naval Update Map shows the approximate current locations of U.S. Carrier Strike Groups (CSGs) and Amphibious Ready Groups (ARGs), based on available open-source information. No classified or operationally sensitive information is included in this weekly update. CSGs and ARGs are the keys to U.S. dominance over the world's oceans. A CSG is centered on an aircraft carrier and includes significant offensive strike capability. An ARG is centered on three amphibious warfare ships, with a Marine Expeditionary Unit embarked. Carrier Strike Groups CVN 68: The USS Nimitz is underway in the Pacific Ocean. CVN 72: The USS Abraham Lincoln is moored in Yokosuka, Japan. CVN 75: The USS Harry S. Truman is underway in the Mediterranean Sea. CVN 76: The USS Ronald Reagan is underway in the Pacific Ocean. Amphibious Ready Groups/Marine Expedition Units LHA 7: The USS Tripoli is underway in the Pacific Ocean.