Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes. Efficiency is reduced due to the increased force of the propeller in the thinner air. Efficiency is increased due to less friction ...
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An air mass moving inland from the coast in winter. A warm, moist air mass on the windward side of mountains. A light breeze blowing colder air out to sea.
Combed Magenta line. Combed Blue line. Shaded blue line.
Turbulence and showery precipitation. Haze and smoke. Poor visibility and smooth air.
It increases performance. It has no effect on performance. It decreases performance.
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High volume of pilot training or an unusual type of aerial activity. Military training activities that necessitate acrobatic or abrupt flight maneuvers. Unusual, often invisible, hazards to aircraft such as artillery firing, aerial gunnery, or guided missiles.
Warm, moist air over low, flatland areas on clear, calm nights. Moist, tropical air moving over cold, offshore water. The movement of cold air over much warmer water.
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MOA and Restricted Areas. Alert and Restricted Areas. MOA and Alert Areas.
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Good visibility and steady precipitation. Poor visibility and intermittent precipitation. Poor visibility and steady precipitation.
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High temperature, high relative humidity, and high density altitude. Low temperature, low relative humidity, and low density altitude. High temperature, low relative humidity, and low density altitude.