Allocations

 
U.S. Non-Federal-Government Allocations
495 - 505 kHz
MOBILE (distress and calling)


U.S. Federal Government Allocations
495 - 505 kHz
MOBILE (distress and calling)


ITU Region 1 Allocations
495 - 505 kHz
MARITIME MOBILE


ITU Region 2 Allocations
495 - 505 kHz
MARITIME MOBILE


ITU Region 3 Allocations
495 - 505 kHz
MARITIME MOBILE


SpectrumWiki


Footnotes


SpectrumWiki

None found.


Related Documents, Links, and Multimedia:
FCC Proceeding (8)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 495 kHz 500 kHz 505 kHz
Wavelength 605.6 m 599.6 m 593.6 m
Band designator(s) MF MF MF
Isotropic collecting area 29,189.1 m2 28,608.3 m2 28,044.6 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 26.3 dB 26.4 dB 26.5 dB
Free space loss (10 km) 46.3 dB 46.4 dB 46.5 dB
Free space loss (100 km) 66.3 dB 66.4 dB 66.5 dB
Free space loss (1000 km) 86.3 dB 86.4 dB 86.5 dB
Free space loss
(35,786 km = GEO orbit)
117.4 dB 117.5 dB 117.6 dB
Free space loss (378,370 km = Moon) 137.9 dB 138.0 dB 138.1 dB