From the FCC website:GCD said:Yes, you need it domestic and international. It's an urban legend that you don't need one for domestic flight. It became urban legen when the FAA quit checking for it. When the FAA stopped enforcing FCC regs, everyone just began believing it wasn't needed. Just don't leave the US without one, though.
An RP (Restricted Radiotelephone Operator Permit) is NOT needed to operate the following:
- a voluntarily equipped ship or aircraft station (including a CAP station) which operates only on VHF frequencies and does not make foreign voyages or flights.