时间：2011-04-18 00:52来源：蓝天飞行翻译 作者：航空 点击：次
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e.INVALID NON.ALERT. A situation in which the safety logic software did not issue an alert when an alert was required, based upon the design specifications. SAIL BACK. A maneuver during high wind conditions (usually with power off) where float plane movement is controlled by water rudders/opening and closing cabin doors. SAME DIRECTION AIRCRAFT. Aircraft are operating in the same direction when: a.They are following the same track in the same direction; or b.Their tracks are parallel and the aircraft are flying in the same direction; or c.Their tracks intersect at an angle of less than 45 degrees. PCG S.1 SAR. (See SEARCH AND RESCUE.)SAY AGAIN. Used to request a repeat of the last transmission. Usually specifies transmission or portion thereof not understood or received; e.g., “Say again all after ABRAM VOR.” SAY ALTITUDE. Used by ATC to ascertain an aircraft’s specific altitude/flight level. When the aircraft is climbing or descending, the pilot should state the indicated altitude rounded to the nearest 100 feet. SAY HEADING. Used by ATC to request an aircraft heading. The pilot should state the actual heading of the aircraft. SCHEDULED TIME OF ARRIVAL (STA). A STA is the desired time that an aircraft should cross a certain point (landing or metering fix). It takes other traffic and airspace configuration into account. A STA time shows the results of the TMA scheduler that has calculated an arrival time according to parameters such as optimized spacing, aircraft performance, and weather. SDF. (See SIMPLIFIED DIRECTIONAL FACILITY.)SEA LANE. A designated portion of water outlined by visual surface markers for and intended to be used by aircraft designed to operate on water. SEARCH AND RESCUE. A service which seeks missing aircraft and assists those found to be in need of assistance. It is a cooperative effort using the facilities and services of available Federal, state and local agencies. The U.S. Coast Guard is responsible for coordination of search and rescue for the Maritime Region, and the U.S. Air Force is responsible for search and rescue for the Inland Region. Information pertinent to search and rescue should be passed through any air traffic facility or be transmitted directly to the Rescue Coordination Center by telephone. (See FLIGHT SERVICE STATION.)(See RESCUE COORDINATION CENTER.)(Refer to AIM.)SEARCH AND RESCUE FACILITY. A facility responsible for maintaining and operating a search and rescue (SAR) service to render aid to persons and property in distress. It is any SAR unit, station, NET, or other operational activity which can be usefully employed during an SAR Mission; e.g., a Civil Air Patrol Wing, or a Coast Guard Station. (See SEARCH AND RESCUE.)SECONDARY RADAR TARGET. A target derived from a transponder return presented on a radar display. SECTIONAL AERONAUTICAL CHARTS. (See AERONAUTICAL CHART.)SECTOR LIST DROP INTERVAL. A parameter number of minutes after the meter fix time when arrival aircraft will be deleted from the arrival sector list. SECURITY SERVICES AIRSPACE . Areas established through the regulatory process or by NOTAM, issued by the Administrator under title 14, CFR, sections 99.7, 91.141, and 91.139, which specify that ATC security services are required; i.e., ADIZ or temporary flight rules areas. SEE AND AVOID. When weather conditions permit, pilots operating IFR or VFR are required to observe and maneuver to avoid other aircraft. Right-of-way rules are contained in 14 CFR Part 91. SEGMENTED CIRCLE. A system of visual indicators designed to provide traffic pattern information at airports without operating control towers. (Refer to AIM.)SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE. An instrument approach procedure may have as many as four separate segments depending on how the approach procedure is structured. a. Initial Approach. The segment between the initial approach fix and the intermediate fix or the point where the aircraft is established on the intermediate course or final approach course. (See ICAO term INITIAL APPROACH SEGMENT.)b. Intermediate Approach. The segment between the intermediate fix or point and the final approach fix. (See ICAO term INTERMEDIATE APPROACH SEGMENT.)c. Final Approach. The segment between the final approach fix or point and the runway, airport, or missed approach point. (See ICAO term FINAL APPROACH SEGMENT.)d. Missed Approach. The segment between the missed approach point or the point of arrival at PCG S.2 decision height and the missed approach fix at the prescribed altitude. (Refer to 14 CFR Part 97.)(See ICAO term MISSED APPROACH PROCEDURE.)SEPARATION. In air traffic control, the spacing of aircraft to achieve their safe and orderly movement in flight and while landing and taking off. (See SEPARATION MINIMA.)(See ICAO term SEPARATION.)SEPARATION [ICAO]. Spacing between aircraft, levels or tracks. SEPARATION MINIMA. The minimum longitudi-nal, lateral, or vertical distances by which aircraft are spaced through the application of air traffic control procedures. (See SEPARATION.)SERVICE. A generic term that designates functions or assistance available from or rendered by air traffic control. For example, Class C service would denote the ATC services provided within a Class C airspace area. SEVERE WEATHER AVOIDANCE PLAN. An approved plan to minimize the affect of severe weather on traffic flows in impacted terminal and/or ARTCC areas. SWAP is normally implemented to provide the least disruption to the ATC system when flight through portions of airspace is difficult or impossible due to severe weather. SEVERE WEATHER FORECAST ALERTS. Preliminary messages issued in order to alert users that a Severe Weather Watch Bulletin (WW) is being issued. These messages define areas of possible severe thunderstorms or tornado activity. The messages are unscheduled and issued as required by the Storm Prediction Center (SPC) at Norman, Oklahoma. |
