Markings/Signs 139.311 Flashcards
3 Runway Classifications by Approach
Visual: can only occur visually with 1,000ft ceilings and 3SM vis
Non-Precision: only horizontal guidance. has an MDA an DP that are specified by the FAA to have runway in sight to continue
Precision: has both vertical and horizontal approach guidance, these are ILS PAR WAAS GBAS, lower DH
What are the two proven techniques that help airport operators enhance surface markings?
Outlining and placing glass beads
How thick are black boarders typically?
6 inches
What types of glass beads are used, and when?
Type III: shall not be applied to red or pink paint
Type IV: when used they should be applied in higher-built materials due to their larger diameters
What are Striated Markings and when can they be used?
they are used in areas subject to frost heave. they consist of painted stripes 4 to 8 inches in width that re separated by unpainted stripes. They have reduced visibility and can never be used on Category II or III runways. the mixing of striated and non-striated markings ins not permitted in a surface marking scheme
Runway Centerline Marking dimensions
120ft in length, with 80ft gaps. 36in inches wide for precision approaches, 18in for non-precision runways, 12 inches for visual runways
Runway Threshold markings
identifies the beginning point used for landings. consists of white longitudinal stripes, starts 20ft from the actual starting pint of the runway threshold
runway width….. 60ft wide= 4 stripes, 75ft wide= 6 stripes, 100ft=8 stripes, 150ft= 12 stripes, 200ft= 16 stripes
for standard runway widths, the stripes are 150 feet long and 5.75 feet wide, the outer edges of the near most par are 11.5ft apart
Runway Aiming Point marking
generally begins 1020ft from the runway threshold. each marking is 150ft in length for runway at least 4,200ft long, and 100ft for shorter runways
check notebook for widths that correspond to runway size
Touchdown Zone Marking
identifies the touchdown zone made along a precision runway in 500ft increments. symmetrically arranged pairs of rectangular bars in groups on on, two, and three along the centerline.
check notebook for dimensions and lateral spacing
900ft no marking zone from the midpoint of the runway back to the threshold. The point is to preserve an 1,800ft unmarked area so pilots do not confuse the surface marking during a landing with the surface marking for the other approach procedures
runway threshold bar marking
10ft in width and extends between the runway edges, white in color, the beginning of usable surface for landing
runway demarcation bar
delineates a runway with a displaced threshold from a blast pad, stop way, or an aligned taxiway. it is yellow, 3 ft wide, and extends across th entire width of the blast pad, stop way, or aligned taxiway
chevron markings
identify pave blast pads, stopways, and MAS in relation to the end of the runway. yellow in color and recommended minimum length of 150ft to allow or at least two chevrons
Runway Shoulder Marking
supplemental to further delineate a paved runway shoulder that pilots have mistaken or are likely to mistake as usable runway. yellow, located between the runway side stripe and the outer edge of the paved shoulder. 3ft in width spaced 100ft apart along the edge of the runway, slanted at a 45 degree angle
Hold Position Markings
purpose is to prevent aircraft and vehicles from entering into critical areas associated with runways and navaids. view notebook for cases and patterns
What are the dimensions of taxiway centerlines
6in or 12inches in areas of low visibility. Yellow