Study Guide

Diese Seite dient der Entwicklung der Trainingsdokumente der FIR Wien.

Geplante Dokumente

• Study Guide: Tower
• Study Guide: Radar
• Study Guide: Airport Details

Study Guide: Tower

Introduction

This Study Guide has been designed to give you all the information needed to start controlling as a Tower controller on the VATSIM network.

Radio Communication - Basics

Because Communication is crucially important for Air Traffic Control a fixed format and syntax us used, in order to minimize the risk of misunderstandings and to keep messages short. Worldwide English is the primary language in use, however in most countries you are also allowed to use the local language. In Austria VFR flights can choose their language whereas IFR flights are mostly conducted in English. Link: Buchstabiertabelle

Basic Rules

In order to achieve the goals set above the following rules important:

1. Listen before you talk

   It's impossible for two radio stations to transmit on the same frequency at the same time. If this is done, the radio signal will be blocked and this will result in a nasty noise on the frequency. Therefore it's important that every station monitors the frequency for about 5 seconds before transmitting, to make sure there’s no ongoing radio traffic. If you hear an ongoing conversation, wait until the conversation is over before you begin to transmit. Don’t start your communication if there is a read-back expected on the last transmission even if there is a short pause.

2. Think before you talk

   The radio traffic flow should be as smooth as possible. To achieve this it's vital to "think first" before transmitting so that a clear, concise and uninterrupted message can be sent.

3. As far as possible use standard phraseology and syntax

   To prevent misunderstandings and to maintain the radio traffic as effective as possible, stick to standardized phraseology and skip slang and of course private messages.

Callsigns and Initial Contact

Every participant on the network has his own Callsign. Controller Positions are identified by their location and their Function (e.g. Wien Radar, Graz Tower), Aircraft either by their Registration (e.g. OE-ALB) or an Airline Callsign followed by a combination of numbers and letters (e.g. AUA25LM, SWR387). To pronounce these letters and digits the ICAO-Alphabet is used. To initiate the contact between two stations an initial call has to be made. This call has the following structure:

Station 1: Station 2, Station 1, Message 
Station 2: Station 1, Station 2, Message

Example - Austrian 251 is calling Wien Tower:

AUA251: Wien Tower, Austrian 251, with you. 
LOWW_TWR: Austrian 251, Wien Tower, Servus!

In Subsequent calls the calling station part can be ommited.
When a controller (or aircraft) transmits a message to a station it is very important that the receiving station acknowledge the message and reads back any required parts.. If the receiving station does not acknowledge, the transmitted message is considered as a lost transmission and the sender should resend the message or check if the receiving station got the message. Items that must always be read back in full are all clearances (including altitudes, heaings, speeds, radials etc), runway in use, altimeter setting (QNH or QFE) and transition level, and all frequencies. For a controller, this is extremely important to remember, since if a pilot's readback is incorrect, the controller has to ask for confirmation, i.e a new readback. There are also items that should not be read back to reduce unnesessary radio transmissions. In short, this includes everything not mentioned above, but a few examples are: wind, temperature and other weather information (except altimeter settings) and traffic information in detail. When giving an instruction the Callsign is stated at the beginning, when reading back you usually add it at the end of your transmission (although you are allowed to do it at the beginning too).

Examples:

LOWW_APP: AUA251, turn left heading 290, descend to Altitude 5000 feet, QNH 1019.
AUA251: Turn left heading 290, descending to altitude 5000 feet QNH 1019, AUA251 

LOWW_GND: OE-DLT, taxi to Holding Point Runway 29 via Exit 12, M and A1, give way to Speedbird Airbus A320 crossing you right to left on M.
OE-DLT: Taxiing to H/P Rwy 29 via Exit 12, M and A1, giving way to Speedbird Airbus A320 on M, OE-DLT.

LOWW_TWR: NLY2678, wind 330 degrees at 6 knots, Rwy 29, cleared for takeoff.
NLY2678: Rwy 29, cleared for takeoff, NLY2678.

METAR and TAF

References for detailed information: METAR, TAF

How is an Aerodrome Organized?

Der TWR (Flugplatzkontrollstelle) ist zuständig für den :

Flugplatzverkehr
Personen und Fahrzeugverkehr auf Manövrierflächen

Nachdem Follow-Me Fahrzeuge nicht mehr eingesetzt werden dürfen entfällt hier der zweite Punkt.
Die Flugplatzkontrollstelle kann nun auch weiter untergliedert werden in die Positionen Delivery (DEL), Ground/Rollkontrolle (GND) sowie Tower/Turm (TWR).

Die nächst höher gelegene "Instanz" ist die APP (Anflugkontrollstelle)

Kontrollierte An- und Abflüge

Die Anflugkontrollstelle in Wien ist für An- und Abflüge zuständig und kann bei Bedarf sektorisiert werden. So kann man den LOWW_APP in jeweils einen Nord-Süd Sektor teilen, oder aber in einen Upper-Lower Sektor aufteilen. Zu Spitzenzeiten werden die Sektoren nach beiden Verfahren geteilt, noch dazu wird eine Director-Position eingerichtet, die LFZ vom Lower Approach auf das ILS führen.

Darüber befindet sich die ACC (CTR) Bezirkskontrollstelle

Für alle übrigen kontrollierten Flüge

Bei VATSIM bearbeitet der LOVV_CTR das gesamte Bundesgebiet und übernimmt auch die Tätigkeit des TWR & APP auf allen österreichischen Flughäfen, sollten diese nicht online sein. Das Gebiet Tirol & Vorarlberg über FL165 wird nicht von LOVV kontrolliert, sondern im Auftrag der ACG von der deutschen Flugsicherung mitbetreut (EDMM).
>br> Alle drei Kontrollstellen üben den Kontrolldienst gemäß §68 Abs.1 LVR aus und erfüllen folgende Aufgaben:

Sicherheit gewährleisten durch
 Vermeidung von Zusammenstößen zwischen Luftfahrzeugen
 Vermeidung von Zusammenstößen zwischen Luftfahrzeugen und Hindernissen auf den Manövrierflächen
Wirtschaftlichkeit gewährleisten durch raschen, flüssigen und geordneten Ablauf des Verkehrs

Diese Aufgaben gelten auch für den Controller in VATSIM, wenn auch aus anderen Beweggründen. In dem Wunsch so nahe an die Realität wie möglich zu kommen, sind diese Leitfäden unerlässlich.

Working Delivery Positions

Clearence Delivery is responsible for checking and correcting flightplans of departing aircraft.

Flightplan Structure

Flight plans are documents filed by pilots with the local Civil Aviation Authority prior to departure. They generally include basic information such as departure and arrival points, estimated time en route, alternate airports in case of bad weather, type of flight (whether instrument flight rules or visual flight rules), pilot's name and number of people on board.
For IFR flights, flight plans are used by air traffic control to initiate tracking and routing services. For VFR flights, their only purpose is to provide needed information should search and rescue operations be required.

Routing Types
Aircraft routing types used in flight planning are: Airway, Navaid and Direct. A route may be composed of segments of different routing types.

Airway
Airway routing occurs along pre-defined pathways called Airways. Mostly aircraft are required to fly airways between the departure and destination airports. The rules cover altitude, airspeed, and requirements for entering and leaving the airway (SIDs and STARs).
Navaid
Navaid routing occurs between Navaids (short for Navigational Aids) which are not always connected by airways. Navaid routing is typically only allowed in the continental U.S. If a flight plan specifies Navaid routing between two Navaids which are connected via an airway, the rules for that particular airway must be followed as if the aircraft was flying Airway routing between those two Navaids. Allowable altitudes are covered in Flight Levels.

Direct
Direct routing occurs when one or both of the route segment endpoints are at a latitude/longitude which is not located at a Navaid.

Issuing IFR Routing Clearances

DEL gives routing clearances to all departing aircraft with the following information:

Destination of aircraft
SID (= Standard instrument departure) Normally the filed SID is given
Initial climb altitude after departure (5000ft)
Squawk (Squawk assignments for LOWW are 4600 to 4620)
QNH (Local QNH of airport according to latest METAR)
CTOT (= Calculated take-off time) Slot time (Normally not used on the VATSIM network)

The bold marked points are mandatory, all other points are optional.

Normal construction of a routing clearence:

Callsign, cleared to XXXX via XXXXX XX departure, (climb initially 5000ft), Squawk 46XX, QNH XXXX

Example:

Austrian 125, cleared to Frankfurt via LUGIM 1C departure, climb initially 5000ft, Squawk 4601, QNH 1020.

After a correct read-back of the pilot hand-off him to next higher position (i.e. GND)

Special Situations (High Traffic, Slots, ...)

Um zügigen Verkehrsfluß bei starkem Verkehr aufrecht zu erhalten, gilt es dem ankommenden Verkehr höhere Priorität als dem abfliegenden Verkehr zu gewährleisten. Hier sollte vor allem die Vergabe von Slots oder die Errichtung von Abflugintervallen eine große Rolle spielen. Ein Slot ist ein gewisser Zeitraum in dem ein Pilot seinen Start-Up, Taxi und Abflug durchführen sollte. Ein Slot folgt also dem anderen. Abflugintervalle dienen dazu, eine relativ große Anzahl von Abflügen in einem gewissen Zeitraum zwischen zwei Wellen vieler ankommender Flüge abzufertigen. Um genug Freiraum für Abflüge zu haben, ist die Koordination mit den Approach Positionen unumgämglich.

Phraseologie in Situationen mit erhöhtem Verkehrsaufkommen

Piloten am Boden kann man mit Hinweisen auf die zu erwartende Verzögerung das Leben leicher machen:

Austrian 125, readback correct, expect startup in 10 minutes

Austrian 125, startup approved, expect departure in 10 minutes

Working Ground Positions

Ground is responsible for all movements of aircraft on ground, except the movements on the runway. Ground takes over responsibility for Delivery if he is not online.

Start-up clearence
Start-up clearence can be given if no other aircraft is taxiing behind the starting-up aircraft and if the take-off is expected in 20 minutes or less.

Austrian 125, start-up approved, (Temperature Minus 3)

Push-back clearence
Push-back clearence can be given if no other aircraft is passing behind and the parking position requires push-back (i.e. position at the gate, … [refer to charts])

Austrian 125, push-back approved”

Combination of both phrases
During low traffic you can use these two phrases together

Austrian 125, start(-up) and push(-back) approved

Taxi Instructions

The easiest way giving taxi instructions to aircraft is to:

Taxi outgoing aircraft on taxiway MIKE (former OSCAR) ASAP.
Taxi incoming aircraft on taxiway LIMA (former INDIA) ASAP.

In this way, collision of aircraft should be avoided. Incoming aircraft on runway 16/34 vacating via B3 to B10 should use taxiway DELTA and LIMA (former INDIA).

Ground Traffic Management

In case of a landing on runway 29 no aircraft is allowed to be in the extended runway centreline of runway 29 while landing aircraft is passing above. In this case aircraft should hold at ROMEO, FOXTROTT, SIERRA and GOLF and wait until the incoming aircraft touched down.
You can also advise aircraft to follow behind another aircraft or give way to other taxiing aircraft.

Austrian 125, follow Airbus 320 to holding-point runway 29
Austrian 125, give way to taxiing Airbus 320 passing from left to right

When an aircraft is approaching its assigned holding-point (and clear of possible traffic-conflict) a hand-off to next higher position (i.e. TWR) shall be initiated as soon as possible.

Austrian 125, contact Tower on 119.40

Intersection take-off
Intersection takeoffs can be granted by GND in coordination with TWR and in accordance or on pilot’s request.

Special Situations (High Traffic, Slots, ...)

Um zügigen Verkehrsfluß bei starkem Verkehr aufrecht zu erhalten, gilt es dem ankommenden Verkehr höhere Priorität als dem abfliegenden Verkehr zu gewährleisten. Hier sollte vor allem die Vergabe von Slots oder die Errichtung von Abflugintervallen eine große Rolle spielen. Ein Slot ist ein gewisser Zeitraum in dem ein Pilot seinen Start-Up, Taxi und Abflug durchführen sollte. Ein Slot folgt also dem anderen. Abflugintervalle dienen dazu, eine relativ große Anzahl von Abflügen in einem gewissen Zeitraum zwischen zwei Wellen vieler ankommender Flüge abzufertigen. Um genug Freiraum für Abflüge zu haben, ist die Koordination mit den Approach Positionen unumgämglich.

Phrasenzusätze in Situationen mit erhöhtem Verkehrsaufkommen

Um den Piloten eine Anweisung mit Nachdruck bekannt zu machen sollen folgende Phrasen angehängt werden. Dies ist vor allem bei der Runway Separation anzuwenden.

Austrian 125, are you ready for immediate departure?
Austrian 125, wind xxx/xx - runway 29 cleared for takeoff, expedite!

Traffic im Anflug kann man auch bitten die Runway rasch zu verlassen:

Austrian 125, wind is xxx/xx runway 34 cleared to land, vacate as soon as practicable

Abfliegenden VFR Verkehr kann man darauf hinweisen den Abflugsektor rasch frei zu machen:

OE-ABC, wind is xxx/xx runway 29 cleared for takeoff, after departure right turn as soon as practicable

Working Tower Positions

Tower is responsible for all movements on the runways as well as for all movements within the control zone (CTR), (10NM radius, GND to 2500ft MSL). Tower is also responsible for ground and delivery if they are not online. He also decides which runways are in use.

ATIS

Bei der ATIS (Automatic Terminal Information Service) handelt es sich um eine automatisch generierte Informationsdurchsage für den Flugverkehr an größeren Flughäfen. Sie wird auf einer eigenen Frequenz in einer Endlosschleife gesendet und soll die aktiven Funkstationen am Flughafen entlasten. Piloten, die unter IFR an- oder abfliegen, sind verpflichtet, vor dem Erstkontakt mit der zuständigen Flugverkehrskontrollstelle zunächst das ATIS abzuhören. Beim Erstkontakt nennt der Pilot den ATIS-Kennbuchbuchstaben, um dem Controller zu bestätigen, dass er die aktuelle Version abgehört hat.

Bestandteile einer ATIS Meldung:

• Name des Flughafens
• Laufender ATIS-Kennbuchstabe
• Zeit der Beobachtung des Flugplatzwetters
• Aktive Landebahn
• Übergangshöhe
• Windrichtung und -geschwindigkeit
• Flugsichten
• besondere Wetterlagen (z.B. Regen)
• Hauptwolkenuntergrenze
• Temperatur und Taupunkt
• QNH
• Änderungstrend

Die ATIS wird alle 30 Minuten oder bei signifikanten Wetteränderungen erneuert.

Determination of active Runways

Pilots normally prefer to takeoff and land the aircraft with the nose into the wind because it shortens the Rwy length required to safely operate the aircraft. The wind direction given in the METAR is the direction the wind is coming from, so it is easy to compare this wind to your given runways.

Example
You are the Tower controller at Salzburg Airport. The only runway at Salzburg is runway 16-34 so you have two directions available (roughly 160° and 340°.) The wind is coming from 180° at 5 knots. So the usual Runway in use would be rwy 16 for takeoff and landing.

However, at most airports a preferred runway configuration is defined (Find them here: Study Guide:Airport Details) which should be used if traffic situation and weather permits. Aircraft have certain limitations they can operate in, so normally the tailwind component should not exceed 5-10 knots (again depending on airport). Also the allowed crosswind is limited (This depends very much on the aircraft).
Be aware that it is the pilots responsibility to accept a certain wind component and that this decision is often based on performance issues, so one pilot might accept the next one refuses to take a certain runway.

So back to our example above:
At Salzburg, due to the terrain in the vicinity and city of Salzburg around the airport, runway 34 is preferred for departures and rwy 16 for landing. So the indicated configuration would be DEP 34, ARR 16.

Transition Altitude/Transition Level

Die Transition Altitude (TA) beträgt in Wien immer 5000 ft. Der Transition Level (TL) ergibt sich in Abhängigkeit zum aktuellen Luftdruck (QNH):

QNH      < 0977: TA + 3000 ft.
QNH 0978 - 1013: TA + 2000 ft.
QNH 1014 - 1050: TA + 1000 ft.
QNH 1051 >     : TA = TL

Zwischen der TA und dem TL befindet sich der Transition Layer, der einen Sicherheitsabstand von mindestens 1000 ft. zwischen dem "unteren Bereich" (Airport Elevation bis A5000 ft.) und dem "oberen Bereich" (Standard Luftdruck 1013 hPa bis Untergrenze TL) gewährleistet. Dadurch werden gefährliche Überschneidungen zwischen dem an- und abfliegenden Verkehr vermieden.

Runway Separation

The runways are one of the most dangerous spots on an airport because aircraft are travelling at high speed with little room to maneuver and most of the time no ability to stop at a reasonable distance. Because of this the general rule is that only one aircaft may be cleared to use a runway at the same time. What this means practically and exceptions from this rule are explained in the following chapters.

Departing Traffic

So now we are at the point where the pilot reaches the Holding Point of his departure runway and reports ready for departure. What are the things you should check before issuing the takeoff clearance?

• Have a look at the flightplan. Take note of the type of aircraft and the Departure Route.
• Check the traffic approaching the runway.

To give him the takeoff clearance the following phrase should be used:

 e.g.: TWR: AUA2CM, wind 320 degerees at 7 knots, runway 29, cleared for takeoff.
 AUA2CM: cleared for takeoff runway 29, AUA2CM

The pilot lines up on the runway, advances the throttle and takes off. When he is well established in climb check he is squawking Mode C and the right Code. Afterwards he is handed off to the next Controller, in this case a radar position:

 TWR: AUA2CM, contact Wien Radar on frequency 128.20, bye bye!
 AUA2CM: Contacting Wien Radar on frequency 128.20, servus, AUA2CM.

The next aircraft reports ready for departure. Again check the points above, but this time we cannot give the takeoff clearance straight away because the preceeding aircraft is still occupying the runway. Now you get to know the first exception to the Runway Seperation rule above. To speed things up you can instruct the next aircraft to line up behind the first one while this one is still in the takeoff roll occupying the runway:

 TWR: AZA639, behind departing Austrian Airbus A319, line-up rwy 29 behind and wait.
 AZA639: behind departing Airbus lining up runway 29 and waiting behind, AZA639.
 Note: The two times behind in this instruction is not a typing error but was implemented to emphasize that part of the clearance.

This type of clearance is called a conditional clearance.

The earliest possible point where you can issue the next takeoff clearance is, when the preceeding aircraft has overflown the opposite runway end or has clearly turned onto either side of it.
However in some cases this could be very close which leads us to the next chapter.

Departure Seperation - Based on Type of Aircraft and departure route

One of the main tasks of air traffic control is to keep aircraft at a safe distance to each other. So imagine the following situation:

Two aircraft are departing right after each other. The first aircraft is a relatively slow Cessna 208 (~around 70 knots in climb), the second one a fast Boeing 767 (140-180 knots on the initial climb). Both follow the same departure route.

Obviously it would not take long until the B767 catches up with the Cessna, a potentially very dangerous situation! You can see, that it is very important to check the flightplan of the aircraft you are about to clear for takeoff.
The minimum radar seperation in the area around an airport is 3 nm or 1000 feet. These are the limits radar stations have to obey. Tower Controllers should aim to achieve the following seperation for departing aircraft following departure routes which share a common part:

Fast followed by slow	3 nm
Matching Types	5 nm
Slow followed by fast	10 nm

In extreme examples like the one above it is often more advisable to coordinate with APP to find another solution. Often this involves clearing the aircraft to a non standard altitude or departure route:

 TWR: DLH2441, after departure maintain runway heading, climb initially to 3000 ft
 DLH2441: After departure maintaining runway heading, climbing to 3000 ft, DLH2441 
 TWR: DLH2441, wind 320 degrees at 9 knots, runway 29, cleared for takeoff
 DLH2441: Cleared for takeoff runway 29, DLH2441

The other main task of ATC is to expedite the flow of traffic. Situation:

You have numerous aircraft departing from the same runway, following different departure routes. Some of them involve immediate right turns other SIDs immediate left turns. There are two holdingpoints available.

It would benificial to use the gaps that arise between the aircraft using similar Departure Routes, so in close coordination with ground you should try to distribute aircraft over the holding points in a way to be able to fill those gaps.

Departure Seperation - Based on Wake Turbulence Category

There are two ways aircraft influence the air around them when passing through it:

Jetwash produced by the engines Turbulence created at the wings and especially at the wingtips

This turbulence can cause severe problems or even loss of control for following aircraft. The wake turbulence categories are based on the Maximum Takeoff weight (MTOW) of the aircraft:

Light Aircraft (L)	< 7 000 kg
Medium Aircraft (M)	7 000 – 136 000 kg
Heavy Aircraft (H)	>136 000 kg

Use of the word takeoff

The word take-off shall only be used in combination with the take-off clearence (cleared for take-off). For other phrases use the word departure (ready for departure – NOT ready for take-off!).

Merging Departing and Arriving Traffic

• Wake Turbulence Separation
• Conditional Clearances

VFR Traffic - Differences

VFR traffic can enter/leave the control zone (CTR) via sector SIERRA (to the south), sector ECHO (to the east) and along the Danube river on the route Klosterneuburg – Freudenau. Maximum altitude in these sectors is 1500ft or according to the VFR charts published online at vacc-sag.org.
VFR flights should be guided into downwind, base and final for landing.

Used phrases:

OE-AGA, enter control zone via VFR route Klosterneuburg – Freudenau, 1500ft or below,
QNH 1020, Squawk 4604, report XXXX (i.e. Freudenau)
OE-AGA hold (orbit) overhead XXXX (i.e. Freudenau) in XXXX (i.e. 2500ft)

OE-AGA, enter downwind for runway 29, report on downwind
OE-AGA, enter base for runway 29, report on base

VFR Flights get their Clearence from Delivery as well. After startup, they will contact Tower for taxi. A possible VFR Clearence could be:

OE-AGA, verlassen Sie die Kontrollzone über Sichtflugstrecke Klosterneuburg, 1500 Fuß oder darunter,
QNH 1014, Squawk 4607, Rechtskurve nach dem Abheben so bald als möglich.
OE-AGA, leave controlzone via VFR-route Klosterneuburg, 1500 feet or below, QNH 1014, Squawk 4607,
right turn after departure as soon as possible.

OE-AGA, steigen sie auf 3500 Fuß, melden Sie Donauturm.
OE-AGA, climb 3500 feet, report Donauturm.

Note that Wien Tower/Turm can also be contacted in German.

Special Situations (High Traffic, Slots, ...)

Um zügigen Verkehrsfluß bei starkem Verkehr aufrecht zu erhalten, gilt es dem ankommenden Verkehr höhere Priorität als dem abfliegenden Verkehr zu gewährleisten. Hier sollte vor allem die Vergabe von Slots oder die Errichtung von Abflugintervallen eine große Rolle spielen. Ein Slot ist ein gewisser Zeitraum in dem ein Pilot seinen Start-Up, Taxi und Abflug durchführen sollte. Ein Slot folgt also dem anderen. Abflugintervalle dienen dazu, eine relativ große Anzahl von Abflügen in einem gewissen Zeitraum zwischen zwei Wellen vieler ankommender Flüge abzufertigen. Um genug Freiraum für Abflüge zu haben, ist die Koordination mit den Approach Positionen unumgämglich

You should assign top priority to inbound traffic not to outbound traffic to keep fluent traffic in rush-hour situations. In case of high traffic the use of slots and departure intervals are recommended. A slot is a period of time in which a pilot should be airborne. One slot is followed by another, continuously. Departure intervals are a certain period of time between two high traffic inbound waves. These departure intervals are used to get rid of outbound traffic. Coordination with approach positions to ensure more spacing between inbounds is necessary.

Phrasenzusätze in Situationen mit erhöhtem Verkehrsaufkommen/phraseology during high traffic

Um den Piloten eine Anweisung mit Nachdruck bekannt zu machen sollen folgende Phrasen angehängt werden. Dies ist vor allem bei der Runway Sseparation anzuwenden.

Austrian 125, are you ready for immediate departure?

Austrian 125, wind is xxx/xx runway 29 cleared for takeoff, expedite

Für Traffic im Anflug, eine Möglichkeit die Runway schneller frei zu bekommen:

Austrian 125, wind is xxx/xx runway 34 cleared to land, vacate runway as soon as practicable

Um VFR Traffic rasch aus dem Abflugsektor zu bekommen gibt es folgende Möglichkeit:

OE-ABC, wind xxx/xx, runway 29 cleared for takeoff, after departure right turn as soon as practicable

Study Guide: Radar

Airspace Structure

LOWW is located very close to the Austrian state boundaries with Hungary, Slovakia and the Czech Republik and space within the TMA (Terminal Maneuvering Area) is very limited.
Arrivals are being transferred to LOWW_APP by five independently working ACC sectors (LKAA/ACC Praha, LZBB/ACC Bratislava, LHCC/ACC Budapest, ACC Wien South, ACC Wien North). Therefore final decisions on the arrival sequence are normally made at a distance of approximately 40 NM from touchdown.

LOWW_APP itself operates up to four different sectors, depending on the amount of traffic. Two Upper Radar sectors specify the arrival sequence for the Lower Sectors. Upper Sectors are operated between FL240 and FL110.

The Lower Radar (FL100 and below) will then make final decisions on the arrival sequence by transferring arriving aircraft to the Director, who issues vectors onto the final approach track and sets up a safe flow of landing traffic. Unless otherwise instructed, initial contact on Director frequency (normally 119.800) shall be made by stating the callsign only in order to reduce frequency load.

When the appropriate spacing is assured until touchdown, Director will transfer the arriving aircraft to Tower.

Seperation and Sequencing Techniques

Planning

LOWW_APP is aiming at a maximum of 15 minutes flight extension for sequencing of arrivals to LOWW within the TMA (Terminal Maneuvering Area). Arriving aircraft will normally get radar vectors to one common downwind.

Speed Control

For efficient sequencing and spacing of arriving aircraft LOWW_APP will instruct specific indicated airspeeds to be maintained (speed control). Aircrews are expected to maintain instructed speeds as accurately as possible. In case of unability to maintain instructed speed (weather reasons, operating limitations etc.) ATC has to be informed immediately.

Abnormal Situations - Emergencies, Radio Failures

All Weather Operations (AWO)
With Low Visibility Procedures in operation, standard approach runway will be runway 16.
Arrivals will be vectored out of the holdings into the left hand circuit for runway 16. Approximate track distance from the holdings to touchdown shall be calculated with 40 to 70 nautical miles.

Study Guide: Airport Details

LOWW (Wien Schwechat)

Pisten

• 11/29: Beton, 3500x45 Meter, ILS
• 16/34: Beton, 3600x45 Meter, ILS

Visual Approches

Approaches using "Own Separation". Visual Approaches will be issued whenever the traffic situation permits. Due to several noise sensitive areas in the vicinity of Vienna Airport, LOWW_APP has to impose certain restrictions on visual approaches:

• NO visual or short approaches will be issued in the right-hand circuit for runway 16 and in the left-hand circuit for runway 11 (City of Vienna).
• Aircraft instructed to "maintain own separation" during final approach are expected to maintain a safe and efficient separation (normally less than 2,5 NM) to the preceding landing aircraft.

Possible Runway Configurations

The runway utilization concept for LOWW is based on the fact that the airport layout with it's crossing runways normally does not allow simultaneous approaches to both runways. So, whenever possible, runways 11/29 and 16/34 will be used independently to allow departures on one runway (normally 16 or 29) while using the other runway for landing aircraft.

Possible runway configurations are:

• ARR RWY 11 / DEP RWY 16 >>> SE winds, if no simultaneous approach possible
• ARR RWY 34 / DEP RWY 29 >>> calm/NW winds
• ARR RWY 16 / DEP RWY 29 >>> calm/SW winds
• ARR RWY 11/16sim. / DEP RWY 16 >>> calm/SE winds, simultaneous approach possible

Simultaneous approaches to runways 11 and 16 are conducted only at tower's discretion during certain weather conditions (visual reduction of separation). Aircrews are advised to show landing lights as soon as possible.
In case of technical uncertainties during final approach - that might be possible lead to a missed approach - aircrews are asked to inform ATC immediately.

LOWL (Blue Danube Airport)

Pisten

• 09/27: Beton mit 3 Kilometer Länge und 60 Meter Breite
• 09/27 (Gras): Graspiste mit 660 Meter Länge und 45 Meter Breite.

Anflugverfahren

Folgende Anflugverfahren beziehen sich nur auf die Piste 09/27. Die parallele Graspiste ist nur per Sicht anzufliegen.

• ILS:
  • Richtung 27 bis CAT IIIb (109.30, Finalapproachtrack: 266°)
  • Richtung 09 nur CAT I (110.55, Finalapproachtrack: 086°)
• VOR (LNZ, 116.600):
  • Primär Richtung 09 (Radial 086)
  • Mit Platzrundenanflug Richtung 27 (Radial 086, Wegbrechen nach Süden)
• NDB (LNZ 327):
  • Primär Richtung 27 (Radial 266)
  • Mit Platzrundenanflug Richtung 09 (Radial 266, Wegbrechen nach Süden)

ATC-Stationen in Linz

In Linz gibt es folgende zwei Stationen:

• LOWL_TWR (Linz Turm) auf 118.800
• LOWL_APP (Linz Radar) auf 129.620

Besonderheiten in Linz

• In Linz dürfen Platzrundenanflüge (Visualcirclings) nur in südliche Richtung gemacht werden!
• Der Bereich, welcher südlich der Piste 27-09 ist, ist militärisches Gelände!
• Für größere Flugzeugtypen stehen in Linz folgende Parkpositionen zur Verfügung:
  • Position 13 bis zur Boeing 747-400
  • Position 11 auch bis Boeing 747-400 (Wenn auf 11 und 13 B744 sind, kein Platz auf 12)

LOWS (Salzburg Maxglan)

Pisten

• 16/34: Beton mit 2.75 Kilometer Länge und 45 Meter Breite

Anflugverfahren

• ILS: Richtung 16 bis Special CATIII (109.90 OES, Finalapproachtrack: 156°)
• NDB:(SBG 382.0), primär Richtung 16 (Radial 156)
• Visual Circling:, Richtung 16 bis SI 410.0 (Radial 336, wegbrechen nach links)

ATC Stationen in Salzburg

In Salzburg gibt es folgende Stationen:

• LOWS_DEL (Salzburg Delivery) auf 121.750
• LOWS_TWR (Salzburg Tower) auf 118.100
• LOWS_APP (Salzburg Radar) auf 123.720

Auf VATSIM nicht genehmigt:

• LOWS_F_APP (Salzburg Director) auf 134.970

LOWI

INNSBRUCK KRANEBITTEN

LOWK

KLAGENFURT ALPE ADRIA AIRPORT

LOWG

GRAZ THALERHOF

Ressourcen

• VATEUD-TD: Radio Communication
• Wikipedia: Buchstabentafel