621 TWR was informed that their broadcast will be 1 h later, from 18.30 h UTC (not as in A21, A20 etc when was from 17.30 h).
Rumen Pankov to MWlist iog (2022-04-09)
621 TWR was informed that their broadcast will be 1 h later, from 18.30 h UTC (not as in A21, A20 etc when was from 17.30 h).
Rumen Pankov to MWlist iog (2022-04-09)