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Patients selected for transportation by air must be cleared for the proposed flight by an aeromedically trained medical officer either at the originating facility, a casualty staging unit, or an in-transit evacuation facility, or, in his absence, by
During a climb, middle ear air pressure may exceed the pressure of the air in the external ear canal, causing the eardrum to bulge outward. Pilots become aware of this pressure change when they experience alternate sensations of “fullness” and “clearing.”. During descent, the reverse happens.
In order to separate air traffic and prevent collisions, aircraft in cruise flight fly at common pressure levels known as flight levels (abbreviated to FL). The flight levels correspond to the altitude in 100-ft increments (hectofeet) above the pressure surface of 1,013.25 hPa calculated according to the standard atmosphere.
Aviation Physiology deals with the physical and mental effects of flight on air crew personnel and passengers. Study of this booklet will familiarize you with some of the physiological problems of flight, and will instruct you in the use of some of the devices that aviation physiologists and others have developed to assist in human compensation ...
The Federal Aviation Regulations require that the minimum flight crew be provided with and use supplemental oxygen after 30 minutes of exposure to cabin pressure altitudes between 12,500 and 14,000 feet, and immediately on exposure to cabin pressure altitudes above 14,000.
assigning flight levels to airplanes operating at above 18,000 feet. The pressure altitude can be determined by either of two methods: 1. by setting the barometric scale of the altimeter to 29.92 and reading the indicated altitude, or 2. by applying a correction factor to the indicated alti-tude according to the reported “altimeter setting.”
A hypobaric chamber, or altitude chamber, is a chamber used during aerospace or high terrestrial altitude research or training to simulate the effects of high altitude on the human body, especially hypoxia (low oxygen) and hypobaria (low ambient air pressure).
