I've never heard of a land oil rig radio operator. I know there's offshore radio operators. I guess you could possibly mean operating the entrance and radio on some of the lease or ice roads. If so then that job is mostly making sure everyone coming on to site has the proper tickets, the vehicle is outfitted properly, the job their doing, what site they're going to, and the duration of time they'll be on site. It pretty much entails sitting in a little shack watching a bunch of vehicles passing by and recording license plates.