You would be surprised at the number of Navy guys on Individual Augmentation (IA) doing some odd stuff. From on of my yeoman (E-4 admin guy) manning a turret on a Humvee on patrol to a pilot in charge of (supervising only) an IED jamming and defusing unit. After asking around about this kind of involvement the response I received (Flag level) was "we (the USN) need to show involvment in this conflict to keep the money flowing (i.e. budget intact)."