One of the FAA's first actions has been removing the requirement for demonstrating an ADF approach to acquire an instrument rating. Recent CFIT accidents at Dubrovnik and Cali attest to the fact that proficiency in the use of the ADF is a necessary skill in international operations. Although the NDB is giving way to VORs in some faraway places, there are still plenty of them around in South America, Eastern European countries, Russia, the CIS states and China. Also, all the STAR and SID procedures are based on NDBs only. Both airports are in mountain valleys.
China still has many NDBs remaining over the entire country.
These and many other procedures are still in effect worldwide. Two good ADFs seem like a good idea for international operations. . About Us Best experienced with Click here to start.