Marines launch their Assault Amphibious Vehicle from the hull of the USS Germantown (LSD 42) Nov. 2 during exercise Blue Chromite 15. Blue Chromite demonstrates the Navy and Marine Corps’ amphibious and expeditionary capabilities from the sea. The Marines are with Combat Assault Battalion, 3rd Marine Division, III Marine Expeditionary Force. - Marines launch their Assault Amphibious Vehicle from the hull of the USS Germantown (LSD 42) Nov. 2 during exercise Blue Chromite 15. Blue Chromite demonstrates the Navy and Marine Corps’ amphibious and expeditionary capabilities from the sea. The Marines are with Combat Assault Battalion, 3rd Marine Division, III Marine Expeditionary Force.