The second NDB on my QSL from Sakaernavigatsia, the Air Traffic Safety provider in Georgia was NDB DF on 520 kHz from Mukhrani. According to some sources there used to be an airport in Mukhrani, but if that was the case, it is now closed. The beacon is used for enroute navigation.

QSL email for NDB LU Batumi and DF Mukhrani in Georgia

The distance to Mukhrani is 3167 kms from my QTH: