Not here in the UK.
Yes it is and has been since 1999. Ex 18C. That's not to say that its taught very well.
AMC-FCL 1.125 Exercise 18C Radio navigation
Use of VHF Omni Range
– availability, AIP, frequencies
– selection and identification
– omni bearing selector (OBS)
- to/from indications, orientation
– course deviation indicator (CDI)
– determination of radial
– intercepting and maintaining a radial
– VOR passage
– obtaining a fix from two VORs
Use of automatic direction finding equipment (ADF) – non-directional beacons (NDBs)
– availability, AIP, frequencies
– selection and identification
– orientation relative to the beacon
– homing
Use of VHF direction finding (VHF/DF)
– availability, AIP, frequencies
– R/T procedures and ATC liaison
– obtaining a QDM and homing
Use of en-route/terminal radar
– availability, AIP
– procedures and ATC liaison
– pilot’s responsibilities
– secondary surveillance radar
– transponders
– code selection
– interrogation and reply
Use of distance measuring equipment (DME)
– station selection and identification
– modes of operation
– distance, groundspeed, time to run