190103-N-VT388-0004 SAN DIEGO (Jan. 3, 2019) Hospital Corpsman 2nd Class Eldredge Jones, right, uses an augmented reality-capable helmet while simulating treatment on Hospital Corpsman 3rd Class Dante Ferri to demonstrate how the Tele-Critical Care Unit (TCCU) at Naval Medical Center San Diego can provide real-time guidance to the medic in the field. The TCCU is the only functional unit of its type in the world. (U.S. Navy photo by Mass Communication Specialist 1st Class R. David Valdez/Released)