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similar sounding aircraft identifications. Additionally,
notify each pilot concerned when communicating
with aircraft having similar sounding identifications.
EXAMPLE-
“American Five Twenty-one and American Twenty-one,
transmissions being made to each of you on this
frequency.”
“Advisory to Cessna One Three Two Four, transmissions
to Cessna One Two Three Four also being made on this
frequency.”
4-3-4. ABBREVIATED TRANSMISSION
Transmissions may be abbreviated as follows:
JO 7110.10T 2/14/08
4-3-2 Radio Communications
a. Use the identification prefix and the last three
digits or letters of the aircraft identification after
communications have been established and type of
aircraft is known. Do not abbreviate similar sounding
aircraft identifications or the identification of an air
carrier or other civil aircraft having an FAA
authorized call sign.
b. Omit the facility identification after communication
has been established.
c. Transmit the message immediately after the
callup (without waiting for the aircraft's reply) when
the message is short and receipt is generally assured.
d. Omit the word over, if the message obviously
requires a reply.
4-3-5. ROUTINE RADIO CONTACTS
Record information received from or given to the
pilot. Prior to terminating the contact, provide the
following information:
a. Weather Advisory. When a weather advisory is
in effect, such as a WA, WS, WST, CWA, or AWW,
which pertains to an area within 150 miles of the
aircraft's position, obtain the route and destination if
not already known. Deliver the advisory if it is
pertinent and the pilot indicates that it has not been
received previously.
b. Shifting to Flight Watch. In-flight specialists
shall recommend shifting to the flight watch
frequency for en route advisories when weather
conditions in an area along the pilot's route of flight
so dictate. An example would be a pilot flying into an
area of marginal weather farther along the route. It
would be advantageous for the pilot to contact the
flight watch specialist to pursue an alternate course of
action should the need arise.
PHRASEOLOGYFOR
ADDITIONAL EN ROUTE WEATHER, CONTACT
FLIGHT WATCH (frequency).
NOTEDelete
all references to Flight Watch when not available.
c. NOTAM. When the destination is in your
station's flight plan area, inform the pilot of any
pertinent NOTAM.
d. Altimeter Setting.
1. If the aircraft is operating below 18,000 feet
MSL, issue current altimeter setting obtained from
direct reading instruments or received from weather
reporting stations. Use the setting for the location
nearest the position of the aircraft.
2. If the aircraft is arriving or departing a local
airport served by an operating control tower, issue
altimeter setting on request only.
3. Aircraft arriving or departing from a
nontowered airport which has a commissioned
ASOS/AWOS, with ground-to-air capability, shall
be advised to monitor the ASOS/AWOS frequency
for the altimeter setting.
PHRASEOLOGYMONITOR
(airport) ASOS/AWOS FOR CURRENT
ALTIMETER.
NOTEThis
requirement is deleted if the pilot states, on initial
contact, that he/she has the automated weather.
4. When the barometric pressure is greater than
31.00 inches Hg., Flight Standards will implement
high barometric pressure procedures by NOTAM
defining the geographic area affected. When this
occurs, use the following procedures:
(a) IFR aircraft. Issue the altimeter setting
and advise the pilot that high pressure altimeter
setting procedures are in effect. Control facilities will
issue specific instructions when relaying IFR
clearances and control instructions through AFSS/
FSS facilities when the altimeter is above 31.00
inches Hg.
(b) VFR aircraft. Issue the altimeter setting.
Advise the pilot that high pressure altimeter setting
procedures are in effect and to use an altimeter setting
of 31.00 inches Hg. en route.
PHRASEOLOGYALTIMETER
IN EXCESS OF THREE ONE ZERO ZERO.
HIGH PRESSURE ALTIMETER SETTING
PROCEDURES ARE IN EFFECT.
NOTEAirports
unable to accurately measure barometric
pressures above 31.00 inches Hg. will report the
barometric pressure as missing or in excess of 31.00
inches Hg. Flight operations to or from those airports are
restricted to VFR weather conditions.
REFERENCEAIM,
Chapter 7, Section 2, and FAAO JO 7110.65, Para 2-6-2,
Hazardous Inflight Weather Advisory Service (HIWAS).
e. Incorrect Cruising Altitude. If the aircraft is
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