For a better understanding of 0SS operation, a description of the
OMEGA/VLF network operation and antenna background information is given
in the following paragraphs:
2. J. (1) Omega Navigation Stations
The Omega navigation stations provide a worldwide radio aid to
navigation by transmitting very low frequency radio waves from eight
stations scattered around the world. Refer to Table 1.2 for letter
and number designation and location of each of the eight stations. A
~ilot with an Omega receiver can take advantage of the stable
properties, long-~;
waves as a navigat”
frequencies 10.2, I
frequency assigned
tracked by the 0SS
To prevent signal “
format allows only
a time.
nge, and synchronized format of the Omega radio
on aid. Each station transmits four basic
3.6, 11 1/3 and 11.05 kHz as well as a unique
to each station. (This unique frequency can be
with the tunable 13.6 kHz VLF receiver channel).
nterference among stations, the transmission
one station to transmit a particular frequency at
(2) VLF Communication Stations
The U.S. Navy operates a worldwide VLF radio communication network.
Although not specifically intended as radio-navigation aids, the VLF
signals transmitted by these stations are used by the 0SS to
supplement the Omega station signals. Each VLF station transmits at
a different frequency.
Table 1.3 lists the locations, frequencies,
and transmission strengths of these stations and a similar one in
Great Britain (the term VLF is usually understood to exclude Omega,
although the Omega signals are strictly speaking within the VLF
band).
22-14-00
Page 18.1
Apr 15/93
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