NAVAIR Commander Vice Adm. Carl Chebi (left) gets a firsthand look at the Mask on Breathing Device (MOBD) trainer July 7 at the Patuxent River Aviation Survival Training Center (ASTC). Flight Physiologist Lt. Tyler Grubic (right) demonstrated the effect of the different breathing distress profiles on subject Electronic Warfare Systems Specialist 1 Shawn Bell (center). The MOBD trainer will be available at all eight ASTC locations later this year. (U.S. Navy photo).