An amphibious assault vehicle backs up a ramp. An amphibious assault vehicle backs up a ramp as U.S. Navy sailors guide it into the vehicle stowage area in the well deck of the USS San Antonio (LPD 17) while underway in the Atlantic Ocean on March 9, 2008. Elements of the 26th Marine Expeditionary Unit are aboard the San Antonio to assist in the ship's operational evaluation, which will determine whether it is fully ready to carry Marines into future expeditionary missions. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 492563-D-MQC15-501.jpg Photo Gallery