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the appropriate communication channel and establish
two-way communication, as necessary, with the air
traffic services unit providing flight information service,
Note.- See Notes following 3.6.5.1.
shall report position as specified in 3.6.3 for controlled flights.
5.3.3 Position reports
An IFR flight operating outside controlled airspace and
required by the appropriate ATS authority to:
- submit a flight plan,
Note.- Aircraft electing to use the air traflc advisory
service whilst operating IFR within specified advisory airspace
are expected to comply with the provisions of3.6, except that
thejlight plan and changes thereto are not subjected 10 clearances
and that two-way communication will be maintained with
the unit providing the air traflc advisoiy service.
APPENDIX 1. SIGNALS
(Note.- See Chapter 3, 3.4 of the Annex)
1. DISTRESS AND URGENCY SIGNALS
Note 1.- None of the provisions in this section shall
prevent the use, by an aircraft in distress, of any means at its
disposal to attract attention, make known its position and
obtain help.
Note 2.- For fill details of telecommunication transmission
procedures for the distress and urgency signals, see
Annex 10, Volume II, Chapter 5.
Note 3.- For details of the search and rescue visual signals,
see Annex 12.
1.1 Distress signals
The following signals, used either together or separately, mean
that grave and imminent danger threatens, and immediate
assistance is requested:
transmitted by hand but its transmission by means of an
automatic instrument is recommended.
3270 The radiotelephone alarm signal consists of two
substantially sinusoidal audio frequency tones transmitted
alternately. One tone shall have a frequency of 2 200 Hz
and the other a frequency of 1 300 Hz, the duration of each
tone being 250 milliseconds.
3271 The radiotelephone alarm signal, when generated
by automatic means, shall be sent continuously for a period
of at least thirty seconds but not exceeding one minute;
when generated by other means, the signal shall be sent as
continuously as practicable over a period of approximately
one minute.
1.2 Urgency signals
a) a signal made by radiotelegraphy or by any other 1.2.1 The following signals, used either together or
signalling method consisting of the group SOS separately, mean that an aircraft wishes to give notice of dif-
(. . .--- . . . in the Morse Code); ficulties which compel it to land without requiring immediate
assistance:
b) a radiotelephony distress signal consisting of the spoken
word MAYDAY; a) the repeated switching on and off of the landing lights;
or
c) a distress message sent via data link which transmits the
intent of the word MAYDAY;
d) rockets or shells throwing red lights, fired one at a time
at short intervals;
e) a parachute flare showing a red light.
Note.- Article 41 ofthe ITU Radio Regulations (Nos. 3268,
3270 and 3271 refer) provides information on the alarm signals
for actuating radiotelegraph and radiotelephone auto-alarm
systems:
3268 The radiotelegraph alarm signal consists of a
series of twelve dashes sent in one minute, the duration of
each dash being four seconds and the duration of the
interval between consecutive dashes one second. It may be
b) the repeated switching on and off of the navigation
lights in such manner as to be distinct from flashing
navigation lights.
1.2.2 The following signals, used either together or
separately, mean that an aircraft has a very urgent message to
transmit concerning the safety of a ship, aircraft or other
vehicle, or of some person on board or within sight:
a) a signal made by radiotelegraphy or by any other
signalling method consisting of the group XXX;
b) a radiotelephony urgency signal consisting of the spoken
words PAN, PAN;
c) an urgency message sent via data link which transmits
the intent of the words PAN, PAN.
ANNEX 2 APP 1-1
Annex 2 - Rules of the Air Appendix 1
2. SIGNALS FOR USE IN THE EVENT OF INTERCEPTION
2.1 Signals initiated by intercepting aircraft and responses by intercepted aircraft
Series
1
2
. 3
1 INTERCEPTING Aircraft Signals
DAY or NIGHT - Rocking aircraft and
flashing navigational lights at irregular
intervals (and landing lights in the case of a
helicopter) from a position slightly above and
ahead of, and normally to the left of, the
intercepted aircraft (or to the right if the
intercepted aircraft is a helicopter) and, after
acknowledgement, a slow level turn, normally
to the left (or to the right in the case of a
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