 Often, a senior NFO is paired with a junior pilot (and vice versa).NFO astronauts have also flown aboard the Space Shuttle and the International Space Station as mission specialists and wear NFO-astronaut wings.Like their naval aviator counterparts, NFOs in both the Navy and Marine Corps have commanded aviation squadrons, carrier air wings, shore-based functional air wings and air groups, marine aircraft groups, air facilities, air stations, aircraft carriers, amphibious assault ships, carrier strike groups, expeditionary strike groups, Marine aircraft wings, Marine expeditionary forces, numbered fleets, and component commands of unified combatant commands.