Allocations

 
U.S. Non-Federal-Government Allocations
525 - 535 kHz
MARITIME MOBILE US221
AERONAUTICAL RADIONAVIGATION (radiobeacons) US221


U.S. Federal Government Allocations
525 - 535 kHz
MARITIME MOBILE US221
AERONAUTICAL RADIONAVIGATION (radiobeacons) US221


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


ITU Region 2 Allocations
525 - 535 kHz
BROADCASTING
AERONAUTICAL RADIONAVIGATION


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


SpectrumWiki

Band Uses (505 - 535 kHz)

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)



5.86   In Region 2, in the band 525-535 kHz the carrier power of broadcasting stations shall not exceed 1 kW during the day and 250 W at night.



US18   In the bands 9-14 kHz, 90-110 kHz, 190-415 kHz, 510-535 kHz, and 2700-2900 MHz, navigation aids in the U.S. and its insular areas are normally operated by the Federal Government. However, authorizations may be made by the FCC for non-Federal operations in these bands subject to the conclusion of appropriate arrangements between the FCC and the Federal agencies concerned and upon special showing of need for service which the Federal Government is not yet prepared to render.

US221   Use of the mobile service in the bands 525-535 kHz and 1605-1615 kHz is limited to distribution of public service information from Travelers Information stations operating on 530 kHz and 1610 kHz.

US239   Aeronautical radionavigation stations (radiobeacons) may be authorized, primarily for off-shore use, in the band 525-535 kHz on a non-interference basis to travelers information stations.

SpectrumWiki

 
AM Broadcast Band
AM Broadcast Band
Aeronautical Nondirectional Radiobeacons (NDBs)


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 505 kHz 520 kHz 535 kHz
Wavelength 593.6 m 576.5 m 560.4 m
Band designator(s) MF MF MF
Isotropic collecting area 28,044.6 m2 26,449.9 m2 24,987.6 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 26.8 dB 26.9 dB
Free space loss (10 km) 46.5 dB 46.8 dB 46.9 dB
Free space loss (100 km) 66.5 dB 66.8 dB 66.9 dB
Free space loss (1000 km) 86.5 dB 86.8 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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