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and provide the runway information as follows:
(a) For takeoff and landing operations state
the runway most nearly aligned into the wind.
(b) Inform the pilot when the current wind
direction is varying enough that the selection of the
favored runway may be affected, when there is more
than 10 knots between peaks and lulls, or the pilot has
requested the information.
(c) If there is no wind, state the runway
currently in use, the runway favored by a shorter
taxiway, or other local consideration.
(d) When airport management has designated
a runway to be used under certain wind or other
conditions (and has informed the FSS in writing)
issue runway information accordingly.
(e) If the majority of the traffic has been using
a runway other than the favored or designated
runway, advise the pilot.
EXAMPLELanding
airport has runways 27 (longer) and 32 with most
pilots utilizing the shorter runway, “FAVORED RUNWAY
32, WINDS VARYING BETWEEN 280 AND 340, SPEED
15 GUSTING 28.”
(f) When a pilot advises he/she will use a
runway other than the favored or the designated
runway, inform all known concerned traffic.
PHRASEOLOGYATTENTION
ALL AIRCRAFT. (Aircraft type)
DEPARTING/LANDING RUNWAY (number).
(g) If a pilot requests the distance between an
intersection and the runway end, furnish measured
data from the local airport intersection takeoff
diagram or other appropriate sources.
(h) The favored or designated runway is
never provided with RAIS.
3. Traffic. Factual information about observed
or reported traffic, which may constitute a collision
hazard. This may include positions of aircraft inflight
and/or aircraft and vehicles operating on the airport.
PHRASEOLOGYTRAFFIC
(Aircraft type), (position), (minutes) AGO.
4. Altimeter Setting.
(a) LAA/RAA: Apply special procedures
when the altimeter setting is more than
2/14/08 JO 7110.10T
Airport Advisory Services 4-4-3
31.00inchesHg. Stations with the capability of
reading altimeter settings above 31.00 inches Hg.
shall issue altimeter settings.
PHRASEOLOGYALTIMETER
IN EXCESS OF THREE ONE ZERO ZERO.
HIGH PRESSURE ALTIMETER SETTING
PROCEDURES ARE IN EFFECT.
(b) RAIS: Do not provide the altimeter unless
specifically requested. Then, provide the altimeter
from the last official weather report.
5. Weather. When the pilot does not have the
weather conditions, issue the last reported or known
weather information as follows:
(a) LAA/RAIS/RAA:
(1) Wind direction and speed.
(2) Altimeter.
(3) Ceiling and visibility to VFR aircraft
when less than basic VFR conditions exist.
(4) Visibility to VFR aircraft when it is less
than three miles in any quadrant.
(5) Touchdown RVR/RVV for the runway
in use where RVR/RVV readout equipment is located
at the workstation providing the service.
(6) To IFR aircraft executing an instrument
approach or departure and to the appropriate control
facility when visibility is less than 3 miles or when
the ceiling is less than 1,000 feet or below the highest
circling minimum, whichever is greater.
6. Weather advisory alert. Provide in accordance
with subpara 4-3-5a.
PHRASEOLOGY-
(Advisory description) IS CURRENT FOR (condition)
OVER (area).
7. Density Altitude.
(a) Facilities at airports with field elevations
of 2,000 feet MSL or higher, transmit a density
altitude advisory to departing general aviation
aircraft whenever the temperature reaches the criteria
contained in TBL 2-2-1.
PHRASEOLOGYCHECK
DENSITY ALTITUDE
(b) Omit this advisory if pilot states the
computation has been done or if the specialist is
aware that a density altitude computation for that
aircraft was included in the preflight briefing.
8. Wake Turbulence. Issue cautionary information
to any aircraft if in your judgment wake
turbulence may have an adverse effect on it.
PHRASEOLOGYCAUTION
WAKE TURBULENCE (traffic information).
NOTEWake
turbulence may be encountered by aircraft in flight
as well as when operating on the airport movement area.
Because wake turbulence is unpredictable, air traffic
personnel are not responsible for anticipating its
existence or effect.
9. NOTAM. NOTAMs concerning local
NAVAIDs and field conditions pertinent to flight.
EXAMPLE-
“All runways covered by packed snow 6 inches deep.”
10. Braking Action. Furnish braking action
reports as received from pilots or airport management
to all aircraft as follows:
(a) Describe braking action using the terms
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