In order to realize safe and accurate homing of a powered parafoil under the condition of insufficient initial altitude, a multiphase homing path is designed according to the flight characteristics of the vehicle.
"We are issuing this AD [airworthiness directive] to prevent loss of flight-critical information displayed to the flight crew during a critical phase of flight, such as an approach or take-off, which could result in loss of airplane control at an altitude insufficient for recovery, or controlled flight into terrain," it said.
Six days residence at moderate altitude is insufficient to return activity profiles to sea-level norms.
Sofen et al. (2016) indicated that the current monitoring network of surface O3 (including low-altitude stations) is insufficient for measurements in key regions (China, India, Amazon, Africa, tropical oceans, and Southern Ocean) and suggested the establishment of 20 possible sites (10 island and 10 continental).
"[The co-pilot] mistakenly switched off the air-conditioning unit," an official with the Civil Aviation Administration of China told the Morning Post, "resulting in insufficient oxygen in the cabin and an altitude warning".
Six days at moderate altitude was deemed to be insufficient to fully acclimatise and protect against the reduced activity profiles of soccer players, 3 and a 2 week acclimatisation period was recommended.
At the highest altitudes, gunpowder combustion gases are insufficient due to the low ambient pressure, so CO2 expansion actuation is used instead.
In particular, anyone arranging an early or late holiday should choose somewhere at high altitude, then even if there's insufficient natural stuff, the sub-zero temperatures – at least at night – should ensure that artificial snowmaking can take place.
A number of confounding situations have been identified which may blunt an erythropoietic response to altitude exposure namely iron deficiency, illness, inflammation or insufficient energy availability.
