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mobile service. The ITU Radio Regulations specih in
Appendix S13, Part A2 that the frequency 2 182 kHz is the
international distress frequency for radiotelephony to be used
for that purpose by ship, aircraft and survival craft stations
using frequencies in the authorized bands between 1 605 kHz
and 4 000 kHz when requesting assistance from the maritime
service.
With respect to emergency locator transmitters (ELTs)
designed to be detected and located by satellite, the Radio
Regulations authorize the use of these devices, which are
referenced in ITU as satellite emergency position indicating
radio beacons (EPIRBs). Radio Regulations Appendix S13,
Part A2 specpes that the band 406 - 406.1 MHz is used
exclusively by satellite emergency position indicating radio
beacons in the earth-to-space direction.
service for distress and safety purposes. The aeronautical
mobile (R) service frequencies 3 023 kHz and 5 680 kHz may
be employed for coordinated search and rescue operations
with the maritime mobile service under RR S5.115.
Similarly, the frequency 500 kHz (RR S5.83) is the international
distress frequency for Morse radiotelegraphy to be
used for that purpose by ship, aircraft and survival craft
stations using frequencies in the bands between 415 kHz and
535 kHz when requesting assistance from the maritime service
(RR Appendix S13, Part A2).
With respect to survival craft stations, the Radio
Regulations provide for the use of the frequency(ies)
500 kHz, 8 364 kHz, 2 182 kHz, 121.5 MHz and 243 MHz,
if the survival craft is capable of operating in the bands
415 - 535 kHz, 4 000 - 27 500 kHz, 1 605 - 2 850 kHz,
117.975 - 137 MHz and 235 - 328.6 MHz respectively
(RR Appendix S13, Part A2).
2.1 Frequencies for emergency locator
transmitters (ELTs) for search and rescue
2.1.1 Until 1 January 2005 emergency locator transmitters
camed in compliance with Standards of Annex 6, Parts I, I1
and I11 shall operate either on both 406 MHz and 121.5 MHz
or on 121.5 MHz.
2.1.2 All emergency locator transmitters installed on or
after 1 January 2002 and carried in compliance with Standards
of Annex 6, Parts I, I1 and I11 shall operate on both 406 MHz
and 121.5 MHz.
2.1.3 From 1 January 2005, emergency locator transmitters
camed in compliance with Standards of Annex 6, Parts I, I1 and
III shall operate on both 406 MHz and 121.5 MHz.
Note 1.- ITU Radio Regulations (S5.256 and
Appendix S13) provide for the use of 243 MHz in addition to
the above frequencies.
Note 2.- Specifications for ELTs are found in Annex 10,
Volume 111, Part 11, Chapter 5.
The frequency 4 125 kHz is also authorized by the 1TU to
enable communications between stations in the maritime
mobile service and aircmfr stations in distress. The current 2.2 Search and rescue frequencies
ITU Radio Regulations (RR S5.130 and Appendix S13) state
that the carrier frequency 4 125 kHz may be used by aircraft 2.2.1 Where there is a requirement for the use of high
stations to communicate with stations of the maritime mobile frequencies for search and rescue scene of action coordination
ANNEX 10 - VOLUME V 2-1 111 1/01
Annex 10 - Aeronautical Telecommunications
purposes, the frequencies 3 023 kHz and 5 680 kHz shall be
employed.
2.2.2 Recommendation.- Where specific frequencies
are required for communication between rescue coordination
centres and aircraft engaged in search and rescue operations,
they should be selected regionally from the appropriate
aeronautical mobile frequency bands in light of the nature of
Volume V
the provisions made for the establishment of search and rescue
aircraft.
Note.- Where civil commercial aircraft take part in search
and rescue operations, they will normally communicate on the
appropriate en-route channels with the flight information
centre associated with the rescue coordination centre
concerned.
CHAPTER 3. UTILIZATION OF FREQUENCIES BELOW 30 MHz
Introduction
High frequency bands allocated to the
aeronautical mobile (R) service
The frequency bands between 2.8 MHz and 22 MHz allocated
to the aeronautical mobile (R) service are given in Article S5
of the ITU Radio Regulations. The utilization of these bands
must be in accordance with the relevant provisions of the
Radio Regulations. Prior to 1 September 1979, the provisions
are contained in the Final Acts of the ITU Extraordinary
Administrative Radio Conference (Geneva 1966). On
I September 1979, revised provisions came into force, details
of which are contained in the Final Acts of the World Administrative
Radio Conference for the Aeronautical Mobile (R)
　
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