Allocations

 
U.S. Non-Federal-Government Allocations
22 - 22.855 MHz
MARITIME MOBILE 5.132 US82

FCC Rule Parts:
Maritime (80)

U.S. Federal Government Allocations
22 - 22.855 MHz
MARITIME MOBILE 5.132 US82


ITU Region 1 Allocations
22 - 22.855 MHz
MARITIME MOBILE 5.132


ITU Region 2 Allocations
22 - 22.855 MHz
MARITIME MOBILE 5.132


ITU Region 3 Allocations
22 - 22.855 MHz
MARITIME MOBILE 5.132


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Footnotes

Could not find RR5.132

5.156   Additional allocation: in Nigeria, the band 22 720-23 200 kHz is also allocated to the meteorological aids service (radiosondes) on a primary basis.

US82   In the bands 4146-4152 kHz, 6224-6233 kHz, 8294-8300 kHz, 12 353-12 368 kHz, 16 528-16 549 kHz, 18 825-18 846 kHz, 22 159-22 180 kHz, and 25 100-25 121 kHz, the assignable frequencies may be authorized on a shared non-priority basis to Federal and non-Federal ship and coast stations (SSB telephony, with peak envelope power not to exceed 1 kW).

US296   In the bands designated for ship wide-band telegraphy, facsimile and special transmission systems, the following assignable frequencies are available to non-Federal stations on a shared basis with Federal stations: 2070.5 kHz, 2072.5 kHz, 2074.5 kHz, 2076.5 kHz, 4154 kHz, 4170 kHz, 6235 kHz, 6259 kHz, 8302 kHz, 8338 kHz, 12 370 kHz, 12 418 kHz, 16 551 kHz, 16 615 kHz, 18 848 kHz, 18 868 kHz, 22 182 kHz, 22 238 kHz, 25 123 kHz, and 25 159 kHz.

US340   The band 2-30 MHz is available on a non-interference basis to Federal and non-Federal maritime and aeronautical stations for the purposes of measuring the quality of reception on radio channels. See 47 CFR 87.149 for the list of protected frequencies and bands within this frequency range. Actual communications shall be limited to those frequencies specifically allocated to the maritime mobile and aeronautical mobile services.


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Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 22000 kHz 22427.5 kHz 22855 kHz
Wavelength 13.6 m 13.4 m 13.1 m
Band designator(s) HF HF HF
Isotropic collecting area 14.8 m2 14.2 m2 13.7 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 59.3 dB 59.5 dB 59.6 dB
Free space loss (10 km) 79.3 dB 79.5 dB 79.6 dB
Free space loss (100 km) 99.3 dB 99.5 dB 99.6 dB
Free space loss (1000 km) 119.3 dB 119.5 dB 119.6 dB
Free space loss
(35,786 km = GEO orbit)
150.4 dB 150.5 dB 150.7 dB
Free space loss (378,370 km = Moon) 170.9 dB 171.0 dB 171.2 dB
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