Sec. 139.323 - Traffic and wind direction
Each certificate holder shall provide
the following on its airport:
(a) A wind cone that provides surface
wind direction information visually to pilots. For each airport in a Class
B airspace area, supplemental wind cones must be installed at each runway
end or at least at one point visible to the pilot while on final approach
and prior to takeoff. If the airport is open for air carrier operations
during hours of darkness, the wind direction indicators must be lighted.
(b) For airports serving any air carrier
operation when there is no control tower operating, a segmented circle
around one wind cone and a landing strip and traffic pattern indicator for
each runway with a right-hand traffic pattern.
[Doc. No. 24812, 52 FR 44282, Nov. 18, 1987, as
amended by Amdt. 139-18, 56 FR 65664, Dec. 17, 1991]