時間：2011-04-18 00:47來源：藍(lán)天飛行翻譯 作者：航空 點擊：次
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g.Geographic Position Markings. These mark-ings are located at points along low visibility taxi routes designated in the airport’s Surface Movement Guidance Control System (SMGCS) plan. They are used to identify the location of taxiing aircraft during low visibility operations. Low visibility operations are those that occur when the runway visible range (RVR) is below 1200 feet(360m). They are positioned to the left of the taxiway centerline in the direction of taxiing. (See FIG 2.3.12.) The geographic position marking is a circle comprised of an outer black ring contiguous to a white ring with a pink circle in the middle. When installed on asphalt or other dark-colored pavements, the white ring and the black ring are reversed, i.e., the white ring becomes the outer ring and the black ring becomes the inner ring. It is designated with either a number or a number and letter. The number corresponds to the consecutive position of the marking on the route. Airport Marking Aids and Signs 2.3.10 FIG 2.3.11 Surface Painted Signs Airport Marking Aids and Signs 2.3.11 2.3.5. Holding Position Markings a. Runway Holding Position Markings. For runways, these markings indicate where an aircraft is supposed to stop when approaching a runway. They consist of four yellow lines, two solid and two dashed, spaced six or twelve inches apart, and extending across the width of the taxiway or runway. The solid lines are always on the side where the aircraft is to hold. There are three locations where runway holding position markings are encountered. 1. Runway Holding Position Markings on Taxiways. These markings identify the locations on a taxiway where an aircraft is supposed to stop when it does not have clearance to proceed onto the runway. Generally, runway holding position markings also identify the boundary of the runway safety area for aircraft exiting the runway. The runway holding position markings are shown in FIG 2.3.13 and FIG 2.3.16. When instructed by ATC to, “Hold short of (runway “xx”),” the pilot must stop so that no part of the aircraft extends beyond the runway holding position marking. When approaching the runway, a pilot should not cross the runway holding position marking without ATC clearance at a controlled airport, or without making sure of adequate separation from other aircraft at uncontrolled airports. An aircraft exiting a runway is not clear of the runway until all parts of the aircraft have crossed the applicable holding position marking. REFERENCE. AIM, Exiting the Runway After Landing,. Paragraph 4.3.20. 2. Runway Holding Position Markings on Runways. These markings are installed on runways only if the runway is normally used by air traffic control for “land, hold short” operations or taxiing operations and have operational significance only for those two types of operations. A sign with a white inscription on a red background is installed adjacent to these holding position markings. (See FIG 2.3.14.) The holding position markings are placed on runways prior to the intersection with another runway, or some designated point. Pilots receiving instructions “cleared to land, runway “xx”” from air traffic control are authorized to use the entire landing length of the runway and should disregard any holding position markings located on the runway. Pilots receiving and accepting instructions “cleared to land runway “xx,” hold short of runway “yy”” from air traffic control must either exit runway “xx,” or stop at the holding position prior to runway “yy.” 3. Taxiways Located in Runway Approach Areas. These markings are used at some airports where it is necessary to hold an aircraft on a taxiway located in the approach or departure area of a runway so that the aircraft does not interfere with the operations on that runway. This marking is collocated with the runway approach area holding position sign. When specifically instructed by ATC “Hold short of (runway xx approach area)” the pilot should stop so no part of the aircraft extends beyond the holding position marking. (See subparagraph 2.3.8b2, Runway Approach Area Holding Position Sign, and FIG 2.3.15.)b. Holding Position Markings for Instrument Landing System (ILS). Holding position markings for ILS/MLS critical areas consist of two yellow solid lines spaced two feet apart connected by pairs of solid lines spaced ten feet apart extending across the width of the taxiway as shown. (See FIG 2.3.16.) A sign with an inscription in white on a red background is installed adjacent to these hold position markings. When the ILS critical area is being protected, the pilot should stop so no part of the aircraft extends beyond the holding position marking. When approaching the holding position marking, a pilot should not cross the marking without ATC clearance. ILS critical area is not clear until all parts of the aircraft have crossed the applicable holding position marking. REFERENCE. AIM, Instrument Landing System (ILS), Paragraph 1.1.9. c. Holding Position Markings for Taxiway/ Taxiway Intersections. Holding position markings for taxiway/taxiway intersections consist of a single dashed line extending across the width of the taxiway as shown. (See FIG 2.3.17.) They are installed on taxiways where air traffic control normally holds aircraft short of a taxiway intersection. When instructed by ATC “hold short of (taxiway)” the pilot should stop so no part of the aircraft extends beyond the holding position marking. When the marking is not present the pilot should stop the aircraft at a point which provides adequate clearance from an aircraft on the intersecting taxiway. d. Surface Painted Holding Position Signs. Surface painted holding position signs have a red background with a white inscription and supplement the signs located at the holding position. This type of marking is normally used where the width of the holding position on the taxiway is greater than 200 feet(60m). It is located to the left side of the taxiway centerline on the holding side and prior to the holding position marking. (See FIG 2.3.11.)2.3.12 Airport Marking Aids and Signs FIG 2.3.12 Geographic Position Markings FIG 2.3.13 Runway Holding Position Markings on Taxiway RUNWAY TAXIWAY/RUNWAY HOLDING POSITION MARKINGS HOLDING BAY TAXIWAY EXAMPLE OF HOLDING POSITION MARKINGS EXTENDED ACROSS HOLDING BAY Airport Marking Aids and Signs 2.3.13 FIG 2.3.14 Runway Holding Position Markings on Runways |
