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Position Reporting

 
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K.Haroon
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Joined: 11 Dec 2005
Posts: 1307

PostPosted: Sat Mar 30, 2013 11:40 am    Post subject: Position Reporting Reply with quote

Routine Position Reporting

Position reports, formally called AIREPs, are required unless either the AIP or the ATS unit permit the pilot to omit them.

It is normal to omit position reports when under radar control.

Position reports contain the following elements of information, except that the last three may be omitted when prescribed on the basis of regional air

navigation agreements.

Aircraft identification

Position

Time

Level

Next position and time over

Ensuing significant point

Note: when transmitting time, only the minutes of the hour should be required. Each digit should be pronounced separately. The hour is only included when any possibility of confusion is likely to arise.


AIREP Content

The AIREP is divided into three sections, the first always sent, the others only sent when required.

Section 1 - Position Information

Aircraft identification

Position

Time

Flight level or altitude

Next position and ETA


Section 2 - Operational Information

Estimated time of arrival

Endurance


Section 3 - Meteorological Information

Air temperature

Wind

Turbulence

Aircraft icing

Supplementary information


When a special AIREP of pre-eruption volcanic activity, a volcanic eruption or volcanic ash cloud is transmitted, the content and order in the AIREP message is:

Aircraft identification

Position

Time

Flight level or altitude

Volcanic activity observed

Air temperature

Wind

Supplementary information


Routine Met Observations

Routine met observations are made at ATS reporting points roughly an hour apart or when requested.

An aircraft is exempted from making routine observations when:

a) The flight duration is 2 hours or less.

b) The aircraft is within an hour of landing.

c) The aircraft is below 1500 m (5000 ft).

Because position reports are omitted when under radar control and radar control is the norm over land this tends to mean that routine position reports contain met information mostly when operating in oceanic areas.

e.g. Shanwick Airbus123 55 North 15 West 0300 FL330 estimate 57 North 20 West 0400 next 58 North 25 West wind 250 diagonal 50 temperature minus 57 over.

The term "OVER" at the end of the transmission indicates an HF position report.

OVER = My transmission is ended and I expect a response from you.

OUT = This exchange of transmission is ended and no response is expected.

"OVER" and "OUT" are not normally used in VHF communications, these are HF terms.
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