RF is Radio frequency, and it's used to automatically read your lift pass as you go through the gate. My home mountain (Okemo) doesn't have it in place. They still use the old eye-ball technique -- which is far less annoying (and probably less effective) than the scanners they use at some areas, where they use hand held gun scanners to read your pass every blasted time you go for the lift (I hate that). Still, RF seems more common in the west than it is in the east.
Does your mountain use RF?
Does your mountain use RF?

We are, however, this season, going back to manual scanning at all Boyne-owned resorts, which wasn't used last season -- and apparently that fact was abused. Unless the pass scanners and queue leaders get truly organized, it's going to be a mess....again...not to mention that the manual scanners don't read through clear pass pocket protectors....the availability of which was one of the main benefits of the 3 jackets I own....