Study Guide:Radio Telephony:DEL

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About this Document

This is a reference document to the Study_Guide:Delivery.

Comments, corrections and additions are welcome!

Contact and Handover are not referenced here any more: Every station handles it the same way - see the section Study_Guide:Radio_Telephony#Contact_-_messages_-_handover for details.

Radio check

Sometimes, pilots come up first with a radio check:

AUA251: Delivery, AUA251, Radio Check
ATC: Austrian 251, Wien Delivery, read you 5 by 5

(where the numbers mean "loud" and "clear": 1 by 5 is very low, but clear; 5 by 1 means very loud, but almost unreadable.)

Clearances

Standard clearance

AUA251: Wien Delivery, Austrian 251 [guten Abend], gate C31, Fokker 100, requesting clearance to Munich, Info A [on board].
Syntax= <called station>, <myself>, <position>, <aircraft>, <request>, <ATIS information received>
ATC: Austrian 251, [Wien] Delivery [servus], cleared München SITNI4C, [climb 5000ft,] squawk 4600, info A [correct].
Syntax= <calling station>, <myself>, <clearance destination>, <SID>, [<init. climb altitude>], <squawk>, [<ATIS confirmation>]

Wien Delivery does not need to say initial climb altitude - it's in the charts. 90% of all aircraft ask or mess it up, so you might as well say it right away. At LOWI for example, the charts say "Initial climb altitude: by ATC", so you have to add it. IN LOWS, there are different climb altitudes per SID - you have to say it.

Pilots must read back the clearance, and ATC must acknowledge correct readback (mostly linked with #Handover/Handoff):

AUA251: cleared München SITNI4C, climb 5000ft, squawk 4600, info A on board, Austrian 251.
ATC: Austrian 251, readback correct, contact Ground 1121,6 bye.
AUA251: contacting ground 121,6, bye.

Express clearances

On very busy events (like Finally Austria), Wien Delivery can put in his/her ATIS line:

Wien Delivery: Report ready for clearance callsign-only

Then it comes down to:

AUA251: Delivery, AUA251
ATC: Austrian 251, Delivery, cleared München SITNI4C, squawk 4600, Info A.

Incomplete/wrong readback

On incomplete or wrong clearance, the wrong part is repeated:

AUA251: Delivery, AUA251
ATC: Austrian 251, Delivery, cleared München SITNI4C, squawk 4600, Info A.
AUA251: cleared München SITNI2C, squawk 4600, Info A received.
ATC: Austrian 251, confirm SITNI4C.
AUA251: SITNI4C, Austrian 251.
ATC: Austrian 251, readback correct, contact Ground 121,6.

Flight plan corrections

ATC: Austrian 251, you need an odd flight level, do you request 210 or 230?
AUA251: Flight level 210, Austrian 251.
ATC: Austrian 251, flight plan amended with flight level 210, cleared Frankfurt SITNI4C, Squawk 4600, info A.
AUA251: Flight plan amended Flight level 210, cleared Frankfurt SITNI4C, Squawk 4600, Info A on board.

Clearance modifications

In some cases, clearances have to be modified due to changing runways or clearance altitudes. Most likely, it is GND or TWR who do this, but still it is a clearance chage:

ATC: Austrian 251, re-cleared SITNI5B runway 34, rest of clearance unchanged.
AUA251: re-cleared SITNI5B, Austrian 251.
ATC: Austrian 251, initial clearance altitude 4000ft
AUA251: cleared 5000ft, Austrian 251.

More Information