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Vertical Separation Minimum Between FL 290 and FL 410 Inclusive (Doc 9574).
APP 3-2
APPENDIX 4. UNMANNED FREE BALLOONS
(Note.- See Chapter 3, 3.1.9 of the Annex)
1. Classification of unmanned free balloons
Unmanned ftee balloons shall be classified as:
a) light: an unmanned free balloon which carries a payload
of one or more packages with a combined mass of less
than 4 kg, unless qualifying as a heavy balloon in
accordance with c) 2), 3) or 4) below; or
b) medium: an unmanned ftee balloon which carries a payload
of two or more packages with a combined mass of
4 kg or more, but less than 6 kg, unless qualifying as a
heavy balloon in accordance with c) 2), 3) or 4) below;
or
c) heavy: an unmanned free balloon which carries a payload
which:
1) has a combined mass of 6 kg or more; or
2) includes a.package of 3 kg or more; or
3) includes a package of 2 kg or more with an area
density of more than 13 g per square centimetre; or
4) uses a rope or other device for suspension of the
payload that requires an impact force of 230 N or
more to separate the suspended payload from the
balloon.
Note 1.- The area density referred to in c) 3) is determined
by dividing the total mass in grams of the payload package by
the area in square centimetres of its smallest surface.
Note 2.- See Figure A4-1
2. General operating rules
2.1 An unmanned kee balloon shall not be operated
without appropriate authorization from the State ftom which
the launch is made.
2.2 An unmanned free balloon, other than a light balloon
used exclusively for meteorological purposes and operated in
the manner prescribed by the appropriate authority, shall not
be operated across the territory of another State without
appropriate authorization ftom the other State concerned.
2.3 he authorization referred to in 2.2 shall be obtained
prior to the launching of the balloon if there is reasonable
expectation, when planning the operation, that the balloon may
drift into airspace over the territory of another State. Such
authorization may be obtained for a series of balloon flights or
for a particular type of recurring flight, e.g. atmospheric
research balloon flights.
2.4 An unmanned f?ee balloon shall be operated in
accordance with condtions specified by the State of Registry
and the State(s) expected to be overflown.
2.5 An unmanned ftee balloon shall not be operated in
such a manner that impact of the balloon, or any part thereof,
including its payload, with the surface of the earth, creates a
hazard to persons or property not associated with the operation.
2.6 A heavy unmanned free balloon shall not be operated
over the high seas without prior coordination with the
appropriate' ATS authority.
3. Operating limitations and
equipment requirements
3.1 A heavy unmanned free balloon shall not be operated
without authorization ftom the appropriate ATS authohty at or
through any level below 18 000 m (60 000 ft) pressure-altitude
at which:
a) there are clouds or obscuring phenomena of more than
four oktas coverage; or
b) the horizontal visibility is less than 8 km.
3.2 A heavy or medium unmanned free balloon shall not
be released in a manner that will cause it to fly lower than
300 m (1 000 ft) over the congested areas of cities, towns or
settlements or an open-air assembly of persons not associated
with the operation.
3.3 A heavy unmanned free balloon shall not be operated
unless:
a) it is equipped with at least two payload flighttermination
devices or systems, whether automatic or
operated by telecomrnand, that operate independently of
each other;
ANNEX 2 APP 4-1 24/11/05
Annex 2 - Rules of the Air Appendix 4
CHARACTERISTICS
ROPE or OTHER
SUSPENSION
230 Newtons
0 r
MORE
PAYLOAD MASS
(kilogrammes)
COMBINED MASS
(if Suspension
OR Area density
OR Mass of individual
package are not
Figure A4- I . Classification of unmanned free balloons
APP 4-2
Appendix 4 Annex 2 - Rules of the Air
b) for polyethylene zero-pressure balloons, at least two
methods, systems, devices, or combinations thereof, that
function independently of each other are employed for
terminating the flight of the balloon envelope;
Note.- Superpressure balloons do not require these
devices as they quickly rise after payload discharge and burst
without the need for a device or system designed to puncture
the balloon envelope. In this context a superpressure balloon
is a simple non-extensible envelope capable of withstanding a
dzfferential ofpressure, higher inside than out. It is inflated so
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