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Three different concepts of "night" are referred to in the Federal Aviation Regulations in the US. These include the periods from sunset to sunrise - used for nav lights,; the end of evening civil twilight to the beginning of morning civil twilight (this is the "standard definition of night", given in FAR Section 1.1) - used for logging night flight,
When flying an airplane under Special VFR at night (helicopters are excepted from the regulation). When a commercial pilot is flying an airplane carrying passengers for hire on flights in excess of 50 nautical miles (90 km) or at night. In Class A airspace, since all Class A operations must be conducted IFR.
The night rating is a prerequisite for the issue of a Commercial Pilot Licence. [4] In Australia, the qualification is known as a "Night VFR rating", and requires 10 hours of flight time at night in an aircraft or simulator, including at least 5 hours of cross-country flight at night in an aircraft. [5] A night rating does not expire. [3] [5]
Claudication is most common in the calves but it can also affect the feet, thighs, hips, buttocks, or arms. [2] The word claudication comes from Latin claudicare 'to limp'. Claudication that appears after a short amount of walking may sometimes be described by US medical professionals by the number of typical city street blocks that the patient ...
The symptoms of jet lag can be quite varied, depending on the amount of time zone alteration, time of day, and individual differences. Sleep disturbance occurs, with poor sleep upon arrival or sleep disruptions such as trouble falling asleep (when flying east), early awakening (when flying west), and trouble remaining asleep.
Night flying restrictions are common at airports in Europe. [clarification needed] Most airports in Germany have restrictions and curfews during the night. [citation needed] Several night flying restrictions including full night flight bans have been introduced in order to ensure that residents living near airports can sleep at night.
People with sleep apnea start and stop breathing while they sleep, and snoring is a common side effect. "Sleep apnea is one of the most under-recognized cardiac risk factors in cardiology," says ...
A pilot's view of the runway just before landing in thick fog at night. In aviation, instrument meteorological conditions (IMC) are weather conditions that require pilots to fly primarily by reference to flight instruments, and therefore under instrument flight rules (IFR), as opposed to flying by outside visual references under visual flight rules (VFR).