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4.3.3 When a transponder appears inoperative or malfunctioning, U.S. controllers would instruct
“ . . . reset transponder, squawk” or “ . . . your transponder appears inoperative/malfunctioning,
reset, squawk . . . .”
4.3.6, 4.3.8 U.S. controllers do not say “squawk Charlie.” U.S. controllers may ask a pilot to “ident” or “squawk
standby” or “squawk low/normal” or “squawk MAYDAY on 7700” or “squawk altitude.”
4.3.9 For aircraft above FL 180, U.S. controllers would say, “confirm using two niner niner two as your
altimeter setting, verify altitude” or “stop altitude squawk” “stop altitude squawk; altitude differs by
(number) feet.” U.S. controllers would not say “stop squawk Charlie.”
4.3.10 See 4.3.6, above.
4.3.11, 4.3.12 See 4.3.9, above.
4.3.13 U.S. controllers would say “verify at (altitude)” and/or “verify assigned altitude.”
6.1.1 U.S. controllers would issue MEA/MVA/MOCA/MIA instead of QNH.
Part XIV Procedures Related to Emergenices, Communication Failure and Contingencies
3 The U.S. has organized this material from the perspective of the controller. ICAO has outlined
information the pilot can expect to provide.
4.3 The U.S. uses 2,000 feet above the highest obstacle and for separation from other aircraft, 1,000 feet
above or 2,000 feet below and 5 miles. This includes VFR aircraft.
6.1 The U.S. does not have a section pertaining to emergency separation.
6.3 As previously covered in past differences, the U.S. uses TCAS. U.S. orders speak to controller
actions when advised of an aircraft responding to a resolution alert (RA).
Appendix 1 Instructions for Air−reporting by Voice Communications
AIREP Form of
Air−report
See Part IV, General Provision, 15.1.
31 JULY 08
AIP
United States of America
GEN 1.7−20
15 MAR 07
Nineteenth Edition Federal Aviation Administration
Appendix 2 Flight Plan
See Part IV, General Provision, 8.
2.2 (Item 15) U.S. ATS units do not accept cruising speeds nor filed altitudes/flight levels in metric terms. The
U.S. accepts filed Mach Number expressed as M followed by 3 figures.
2.2 (Item 18) The U.S. requires filed FIR boundary designators and accumulated estimated elapsed times to such
points or FIR boundaries in the sequence and form as prescribed in 2.2, Item 18 of Doc 4444,
Appendix 2.
Appendix 3 ATS Messages
1.1.1 See Part XI, ATS Messages, 1.3.
1.6.2 See Part XII, Phraseologies, 2.8.
1.8.1 (Field
Type 3), (Field
Type 15), and
(Field Type 18).
See Part XI, ATS Messages. 1.3.
See Appendix 2, Flight Plan, 2.2 (Item 15) and 2.2 (Item 18).
2.1, 2.4.5, 2.5 See Part XI, ATS Messages 1.3.
Attachment B This section now appears in the Air Traffic Services Planning Manual (Doc 9426).
3.2 (Item 15) See Appendix 2, Flight Plan, 2.2 (Item 15).
3.2 (Item 18) See Appendix 2, Flight Plan, 2.2 (Item 18).
31 JULY 08
AIP
United States of America
GEN 1.7−21
15 MAR 07
Federal Aviation Administration Nineteenth Edition
ANNEX 3 − METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION
Chapter 3 World Area Forecast System and Meteorological Offices
3.2.1 b), c) The capability to comply continues to be developed.
Chapter 4 Meteorological Observations and Reports
4.3.1 c)* The U.S. does not prepare SPECI for changes in air temperature.
4.3.3 a)* Practices require SPECI for wind shift when wind direction changes by 45 degrees or more in less
than 15 minutes and the wind speed is 10 knots or more throughout the wind shift.
4.3.3 b)* Practices do not require SPECI for increases of mean surface wind speed.
4.3.3 c)* Practices require SPECI for squall, where squall is defined as a strong wind characterized by a
sudden onset in which the wind speed increases at least 16 knots and is sustained at least 22 knots or
more for at least 1 minute.
4.3.3 d)* Practices do not require SPECI for wind direction changes based on local criteria.
4.3.3 f)* SPECI are not prepared for the equivalents in feet of 150, 350, or 600 meters. U.S. military stations
may not report a SPECI based on RVR.
4.3.3 g)* Practices do not require SPECI for the onset, cessation, or change in intensity of:
− freezing fog.
− moderate or heavy precipitation (including showers thereof).
− low drifting dust, sand or snow.
− blowing dust, sand or snow (including snowstorm).
− duststorm.
− sandstorm.
4.3.3 h)*, j)* Practices do not require SPECI when the height of the lowest BKN or OVC cloud layer or vertical
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