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Pugachev Cobra
8th Oct 2009, 15:38
Hello all!

So, in my class my teacher says that an ATZ is a controlled airspace. So, in order for an ATZ to exist, there has to be a TWR.

But I'm pretty sure that's not true. Could someone here direct me to some ICAO/FAA/other documents, and possibly example charts that shows an aerodrome with an ATZ and no TWR, maybe just AFIS.

Thanks in advance!

hetfield
8th Oct 2009, 15:46
What about a little google?

Like this?
Airspaces & Air Traffic Control Services - SKYCOLORS (http://www.skycolors.com/paper_airspaces-services-provided.htm)

Pugachev Cobra
8th Oct 2009, 15:52
Thanks, but I need an aviation authority source, like ICAO.

9.G
8th Oct 2009, 16:16
Definitions in this listing are extracted from the following ICAO documents:
ICAO RULES OF THE AIR, ANNEX 2
PROCEDURES FOR AIR NAVIGATION SERVICES AIR TRAFFIC MANAGEMENT, PANS-ATM (Doc 4444)
PROCEDURES FOR AIR NAVIGATION SERVICES AIRCRAFT OPERATIONS, PANS-OPS (Doc 8168)
DEFINITIONS

AERODROME TRAFFIC ZONE
An airspace of defined dimensions established around an aerodrome for the protection of aerodrome traffic.

It's worth to have Jepp text book handy. :ok:

bookworm
8th Oct 2009, 17:52
An ATZ, although defined in ICAO docs, has no classification as controlled or uncontrolled therein. Thus the answer depends on the state in which the ATZ is established.

In the UK, an ATZ takes on the class of the airspace within which it is established, and hence it may be controlled or uncontrolled airspace.

UK AIP ENR 1.4 2.7.2 (http://www.nats-uk.ead-it.com/aip/current/enr/EG_ENR_1_4_en.pdf)

The presence of a tower (ATC) does not, in itself, establish controlled airspace. In the UK, an ATZ may be in

* controlled airspace with ATC (e.g. Stansted EGSS)
* uncontrolled airspace with ATC (e.g. Cambridge EGSC)
* uncontrolled airspace without ATC (FIS or A/G) (e.g. Duxford EGSU)

Controlled airspace is defined as airspace in which an ATC service is provided to, and mandatory for, all IFR flights. Control of air traffic can be exercised in airspace that is not, by that definition, controlled.

172_driver
8th Oct 2009, 18:16
In Sweden we have two ATZ, both located within or partly within the CTR (class C) of a major aerodrome. Both ATZ are class G airspace and their purpose is to protect the aerodrome traffic. No clearance is required to enter the ATZ but flight within is only permitted in connection with take-off and landing. No TWR or AFIS control, just a common advisory frequency.

52 North
8th Oct 2009, 19:04
This AIC might be of use:

http://www.nats-uk.ead-it.com/aip/current/aic/yellow/EG_Circ_2009_Y_069_en.pdf

52N

ron83
8th Oct 2009, 19:53
don't know how in UK,but in Norhtern Europe with have ATZ class G, so they are located in uncontrolled airspace,and doesn't have any tower,or particular frequencies,however we have common traffic advisory frequency for pilots...