Choose the odd one out.

FAA
OFF
ATT
IFF E. EPP

The odd one out is OFF. The other options are all acronyms for aviation-related terms:

  • FAA: Federal Aviation Administration
  • ATT: Automatic Dependent Surveillance-Broadcast
  • IFF: Identification Friend or Foe
  • EPP: Electrical Power Panel

OFF is not an aviation-related term. It is a common word that means “to turn off” or “to cease to function.”