Allocations

 
U.S. Non-Federal-Government Allocations
505 - 510 kHz
MARITIME MOBILE US79A

FCC Rule Parts:
Maritime (80)

U.S. Federal Government Allocations
505 - 510 kHz
MARITIME MOBILE US79A


ITU Region 1 Allocations
505 - 526.5 kHz
MARITIME MOBILE 5.79 5.79A 5.84
AERONAUTICAL RADIONAVIGATION


ITU Region 2 Allocations
505 - 510 kHz
MARITIME MOBILE 5.79


ITU Region 3 Allocations
505 - 526.5 kHz
MARITIME MOBILE 5.79 5.79A 5.84
AERONAUTICAL RADIONAVIGATION
Aeronautical mobile
Land mobile


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Footnotes

5.79   In the maritime mobile service, the frequency bands 415-495 kHz and 505-526.5 kHz are limited to radiotelegraphy and may also be used for the NAVDAT system in accordance with the most recent version of Recommendation ITU R M.2010, subject to agreement between interested and affected administrations. NAVDAT transmitting stations are limited to coast stations. (WRC 19)

5.79A   When establishing coast stations in the NAVTEX service on the frequencies 490 kHz, 518 kHz and 4 209.5 kHz, administrations are strongly recommended to coordinate the operating characteristics in accordance with the procedures of the International Maritime Organization (IMO) (see Resolution 339 (Rev.WRC 07)). (WRC 07)

5.84   The conditions for the use of the frequency 518 kHz by the maritime mobile service are prescribed in Articles 31 and 52. (WRC 07)

US79A   The use of the bands 415-472 kHz, 479-495 kHz, and 505-510 kHz by the maritime mobile service is limited to radiotelegraphy.


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Aeronautical Nondirectional Radiobeacons (NDBs)




Related Documents, Links, and Multimedia:
FCC Proceeding (1)




Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 505 kHz 515.75 kHz 526.5 kHz
Wavelength 593.6 m 581.3 m 569.4 m
Band designator(s) MF MF MF
Isotropic collecting area 28,044.6 m2 26,887.7 m2 25,800.9 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 26.5 dB 26.7 dB 26.9 dB
Free space loss (10 km) 46.5 dB 46.7 dB 46.9 dB
Free space loss (100 km) 66.5 dB 66.7 dB 66.9 dB
Free space loss (1000 km) 86.5 dB 86.7 dB 86.9 dB
Free space loss
(35,786 km = GEO orbit)
117.6 dB 117.8 dB 118.0 dB
Free space loss (378,370 km = Moon) 138.1 dB 138.3 dB 138.4 dB
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