05 May 2017 "ABOARD THE USS GEORGE H. W. BUSH, Persian Gulf -- The U.S.S. George H. W. Bush in January became the first East Coast-based carrier to deploy with a specialized piece of medical equipment aboard: a hyperbaric chamber, or "transportable recompression system," designed to treat pilots who experience hypoxia-like symptoms in the cockpit. Fewer than four months into the deployment, it has already been used twice for that purpose....
...In both incidents, the pilots involved were fortunate in that the episodes occurred near the carrier, allowing them to land quickly and seek treatment. If an episode had begun above an urban ground fight over Iraq or Syria, the available options might have been more limited, and certainly more complex. Having the recompression chamber aboard to treat pilots' symptoms was a measure that emerged from aviators' feedback, McCall said....
...McCall said the decision to deploy the system -- an egg-shaped pod six to seven feet long -- aboard the Bush was made just weeks before the carrier departed port. "That would not have happened without a dialogue from aviators in squadrons right to the three-star level," he said. "I'll be honest, we've moved that dialogue fairly quickly."
Other mitigation and detection measures also represent firsts for the carrier. McCall said the carrier was the first to deploy its fighters equipped with "slam sticks," small devices that measure cockpit air pressure and other factors, and can provide diagnostics following a mission....
...Another measure, designed to help pilots detect cockpit problems before they can physically feel them, is a true improvisation: the wearing of commercially available Garmin watches, equipped with altimeters and barometric sensors, that can be set to sound alarms when certain thresholds are reached...."
Cockpit Oxygen Episodes Sideline Navy Pilots Fighting ISIS | Military.com