APPENDIX A
GENERAL FREQUENCY ALLOCATIONS

Listed below is the radio spectrum allocation for North America which was in force in the early 1940's. It's intended to give the reader a general idea of where merchant or naval ships operated within the radio spectrum. Note that the practical upper limit of the radio spectrum in 1942 was around 400 MHz. This figure changed to 22 GHz in 1959 and revised to 300 GHz in 1992.
FREQ in kc ALLOCATION
10 - 103 Fixed, government
103 - 141 Coastal telegraph; government.
143 - 193 Maritime calling; ship telegraph; fixed and coastal telegraph (190kc 
exclusive for police).
194 - 391 Government; fixed; airport; aircraft (375 kc for direction finding).
392 - 548 Coastal telegraph; government; ship telegraph; intership phone 
(500kc for marine calling and distress).
550 - 1600 Commercial broadcasting.
1600 - 1712 Geophysical; relay; police; government; marine; experimental; fire;
aviation; motion pictures. 
1750 - 2050 Amateur radio.
2004 - 2500 Experimental visual and relay broadcast; police; government; ship harbour;fixed; misc.
2504 - 3497 Coastal harbour; government; aviation; fixed.
3500 - 4000 Amateur radio.
4005 - 6000 Government; aviation; fixed.
6020 - 6190 International broadcasting; government.
6200 - 6990 Coastal telegraph and phone; government; fixed and miscellaneous.
7000 - 7300 Amateur radio.
7305 - 9490 Government; fixed; aviation; ship telegraph; coastal telegraph;
miscellaneous.
9510 - 9690 International broadcast.
9710 - 11000 Government; fixed aviation.
11010 - 11685 Ship telegraph; maritime calling; government; coastal telegraph
11710 - 11890 International broadcast; government.
11910 - 13990 Aviation; fixed; government; ship telegraph; coastal telegraph; misc.
14000 - 14400 Amateur radio.
14410 - 15085 Fixed.
15110 - 15330 International broadcast; government.
15355 - 17740  Fixed; government; aviation; ship and coastal telegraph.
17660 - 17840 International broadcast.
17860 - 21440 Fixed, government; aviation.
21460 - 21650 International broadcast; government.
21650 - 23175 Coastal telegraph; government; ship telegraph.
23200 - 25000 Aviation; government; miscellaneous.
25025 - 26975 Broadcast; government.
27000 - 27975 Government; general communication.
28000 - 30000 Amateur radio.
30000 - 42000 Police; government; relay broadcast; coastal and ship harbour.
42000 - 50000 Broadcast and educational - FM.
50000 - 56000 Television.
56000 - 60000 Amateur radio.
60000 - 112000 Television; government.
112000 - 116000 Amateur radio.
116110 - 139960 Broadcast; government; aviation; police; misc.
140100 - 143880 Aviation.
144000 - 400000 Government; television ; amateur radio; fixed.
Above 400000 Experimental 
     Source: 1942 Amateur Radio Handbook


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