Flight Manual for Gas Balloons of Type NL-STU
Issue 2.0
May 10, 2019
Page 2-7
2.12 Further constraints
•
Area of use
The gas balloon is flown according to VFR (visual flight rules). Flights by day and by night are
only permissible in compliance with the aviation regulations applicable in the countries being
flown over. These regulations also include licensing and equipment.
• In the case of
high-altitude flights
without additional oxygen, the balloon may ascend
to altitudes of up to 10,000 ft
(
3,000 m) (ISA standard atmosphere). It is permissible to exceed
this limit and ascend to an altitude of up to 12,000 ft (3,600 m) for a maximum of 30 minutes. At
altitudes above 12,000 ft (3,600 m) an uninterrupted supply of oxygen to all occupants of the
basket must be assured.
•
Ignition sources
During inflation of the balloon, the safety zones described in Appendix 3 have to be respected.
During flight, all ignition sources in the basket must be avoided.
During deflation of the balloon, all potential ignition sources within a radius of 50 m of the bal-
loon are prohibited.
WARNING:
Non-compliance with the safety instruction or improper handling of the
balloon causes an immediate and serious threat to the balloon system as
well as to all personnel involved.
