Presently, personnel must obtain an equivalent formal course of another service and volunteer to fly as enlisted aircrew.
Marine Aerial Navigators were eliminated with the introduction of the KC-130J aircraft.
While training of Marine Aerial Navigators has ceased, they continue to fly on the 'legacy' KC-130T aircraft until their eventual replacement with KC-130J airframes.
After designation, Marine Aerial Navigators serve in the Military Occupational Specialty (MOS) 7371 (Aerial Navigator-Trainee) while undergoing aircraft model-specific training and move into MOS 7372 (First Navigator) upon completion of their aircraft type training.
There is no separate insignia worn by warrant officer navigators.