时间：2011-08-28 11:47来源：蓝天飞行翻译 作者：航空 点击：次
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Signal-to-noise ratio. An indication of signal strength received compared to background noise, which is a measure of how adequate the received signal is. Simplex. Transmission and reception on the same frequency. Simplified directional facility (SDF). A NAVAID used for nonprecision instrument approaches. The . nal approach course is similar to that of an ILS localizer; however, the SDF course may be offset from the runway, generally not more than 3°, and the course may be wider than the localizer, resulting in a lower degree of accuracy. Single-pilot resource management (SRM). The ability for crew or pilot to manage all resources effectively to ensure the outcome of the flight is successful. Situational awareness. Pilot knowledge of where the aircraft is in regard to location, air traf. c control, weather, regulations, aircraft status, and other factors that may affect . ight. Skidding turn. An uncoordinated turn in which the rate of turn is too great for the angle of bank, pulling the aircraft to the outside of the turn. Skin friction drag. Drag generated between air molecules and the solid surface of the aircraft. Slant range. The horizontal distance from the aircraft antenna to the ground station, due to line-of-sight transmission of the DME signal. Slaved compass. A system whereby the heading gyro is “slaved to,” or continuously corrected to bring its direction readings into agreement with a remotely located magnetic direction sensing device (usually this is a .ux valve or . ux gate compass). Slipping turn. An uncoordinated turn in which the aircraft is banked too much for the rate of turn, so the horizontal lift component is greater than the centrifugal force, pulling the aircraft toward the inside of the turn. Small airplane. An airplane of 12,500 pounds or less maximum certi.cated takeoff weight. Somatogravic illusion. The misperception of being in a nose-up or nose-down attitude, caused by a rapid acceleration or deceleration while in .ight situations that lack visual reference. Spatial disorientation. The state of confusion due to misleading information being sent to the brain from various sensory organs, resulting in a lack of awareness of the aircraft position in relation to a speci.c reference point. Special use airspace. Airspace in which .ight activities are subject to restrictions that can create limitations on the mixed use of airspace. Consists of prohibited, restricted, warning, military operations, and alert areas. SRM. See single-pilot resource management. SSR. See secondary surveillance radar. SSV. See standard service volume. Standard holding pattern. A holding pattern in which all turns are made to the right. Standard instrument departure procedures (SIDS). |
