Have you, or someone you know, ever suffered from HAPE (high altitude pulmonary oedema)? If so, please visit the
HAPE Database today to find out more, or
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June 2011 Himalayan tragedy
Although there are no mountains at 9000m (29700ft) above sea level, commercial aircraft do fly this high. The pressure on the outside of the cabin of a plane at this altitude would be the same as seven and a third metres of sea water. Thankfully, the aircraft is pressurised to an altitude of around 2500m.
Click for more high altitude facts.
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Last modified 16th November 2010