Restricted radiotelephony certificate
The restricted aeronautical radio certificate for VFR pilots in German-speaking countries: BZF in Germany, BFZ in Austria. It covers VFR radiotelephony only. In Germany the BZF I is valid in English and German, the BZF II in German only.
Pilots who want to fly IFR need the AFZ (AZF).
Practise real radio calls, decode weather and fly ATC scenarios — with an instructor that talks back.