The rapid development of differential GNSS transmissions via low-frequency maritime radiobeacons has further increased the occupancy of an already over-crowded frequency band. This has resulted in interference between stations, with consequent reductions of coverage. The paper suggests a re-allocation of channels within this band in Europe to be carried out, taking careful account of the known groundwave and skywave propagation of both wanted and interfering signals and the distribution of atmospheric noise. A novel algorithm is proposed for re-allocating frequencies. The resulting band plan is shown to offer substantially increased coverage for DGNSS radiobeacons while preserving the performance of marine and aeronautical direction-finding beacons, the latter remaining on their original channels.