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In Assignment Plan a frequency is authorized for use by specified stations. Stations using the same frequency are separated by distances large enough to provide interference-free operation. Distributing frequency to stations is called “assignment” resulting in term “assignment Plan”.In Allotment Plan a frequency is authorized for use in specified geographical areas or countries. These areas are separated by the distances allowing re-use of the same frequency. Later, administrations responsible for such areas assign frequencies to any station located in these areas. Distributing frequency to areas is called “allotment” resulting in term “allotment Plan”.
Frequency assignment plan for stations of the maritime mobile and aeronautical radionavigation service in the MF bands in Region 1 annexed to the Regional Agreement concerning the MF maritime mobile and aeronautical radionavigation services in Region 1, Geneva, 1985 (GE85- MM-R1); Frequency assignment plan for stations of the maritime radionavigation service (radiobeacons) for the European Maritime Area in the band 283.5 – 315 kHz annexed to the Regional Agreement concerning the planning of the maritime radionavigation service (radiobeacons) in the European Maritime Area, Geneva, 1985 (GE85-EMA); The details of relevant Plan are shown in the ITU web page (http://www.itu.int/en/ITU-R/terrestrial/fmd/Pages/frequency-plans.aspx ).
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