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- crossing the wake of the surface craft close astern at a
low altitude and:
1) rocking the wings; or
2) opening and closing the throttle; or
3) changing the propeller pitch.
Note.- The following replies may be made by surface craft
to the signal in I. I:
-for acknowledging receipt of signals:
-for indicating inability to comply:
I) the hoisting of the internationalflag "N" (a blue and
white checkered square);
2) the flashing of a succession of "Nk" in the Morse
code.
Note.- See Note following 1.1 b), 3).
2. Ground-air visual
signal code
2.1 Ground-air visual signal code
for use by survivors
ANNEX 12
Annex I2 - Search and Rescue Appendix
2.2 Ground-air visual signal code 2.3 Symbols shall be at least 2.5 metres (8 feet) long and
for use by rescue units shall be made as conspicuous as possible.
Note 1.- Symbols may be formed by any means such as:
strips of fabric, parnchute material, pieces of wood, stones or
such like material; marking the surface by tramping, or
staining with oil.
Note 2.- Attention to the above signals may be attructed by
other means such as rndio, flares, smoke and reflected light.
Code
symbol
LLL
-LL
xx
e
No.
1
2
3
3. Air-to-ground signals
1 Nothing found. Will continue to search ;,
Message
Operation completed
We have found all personnel
We have found only some personnel
We are not able to continue. Returning
to base
. Have divided into two groups. Each
proceeding in direction indicated
Information received that aircraft is in this
direction
3.1 The following signals by aircraft mean that the
ground signals have been understood:
a) during the hours of daylight:
-by rocking the aircraft's wings;
b) during the hours of darkness:
- flashing on and off twice the aircraft's landing lights
or, if not so equipped, by switching on and off twice
its navigation lights.
3.2 Lack of the above signal indicates that the ground
signal is not understood.
- END -
ICAO TECHNICAL PUBLICATIONS
The following summary gives the status, and also
describes in general terms the contents of the various
series of technical publications issued by the
International Civil Aviation Organization. It does not
include specialized publications that do not fall
spec@cally within one of the series, such as the
Aeronautical Chart Catalogue or the Meteorological
Tables for International Air Navigation.
International Standards and Recommended
Practices are adopted by the Council in accordance with
Articles 54, 37 and 90 of the Convention on
International Civil Aviation and are designated, for
convenience, as Annexes to the Convention. The
uniform application by Contracting States of the
specifications contained in the International Standards is
recognized as necessary for the safety or regularity of
international air navigation while the unifonn
application of the specifications in the Recommended
Practices is regarded as desirable in the interest of
safety, regularity or efficiency of international air
navigation. Knowledge of any differences between the
national regulations or practices of a State and those
established by an International Standard is essential to
the safety or regularity of international air navigation. In
the event of non-compliance with an International
Standard, a State has, in fact, an obligation, under
Article 38 of the Convention, to notify the Council of
any differences. Knowledge of differences from
Recommended Practices may also be important for the
safety of air navigation and, although the Convention
does not impose any obligation with regard thereto, the
Council has invited Contracting States to notify such
differences in addition to those relating to International
Standards.
Procedures for Air Navigation Services (PANS)
are approved by the Council for worldwide application.
They contain, for the most part, operating procedures
regarded as not yet having attained a sufficient degree of
maturity for adoption as International Standards and
Recommended Practices, as well as material of a more
permanent character which is considered too detailed for
incorporation in an Annex, or is susceptible to frequent
amendment, for which the processes of the Convention
would be too cumbersome.
Regional Supplementary Procedures (SUPPS)
have a status similar to that of PANS in that they are
approved by the Council, but only for application in the
respective regions. They are prepared in consolidated
　
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