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

Tower is responsible for all movements on the runways as well as for all movements within the Control Zone (CTR): e.g. LOWW_TWR: 10NM radius, GND to 2500ft MSL).
Tower is also responsible for Ground and Delivery operations if they are not online. Tower also decides which runways are in use.

METAR and TAF

METAR
The word METAR comes from the French phrase "message d’observation météorologique régulière pour l’aviation". It is thought to be a contraction of the French words MÉTéorologique ("Weather") Aviation Régulière ("Routine").
A METAR is a codified observation message indicating airfield weather conditions observed at a given time. Such a message is established every hour, even sometimes every 30 minutes or shorter due to fast and heavy weather changes which affects the traffic flow.

Sample:
LOWW 011220Z 33007KT 280V020 3000 R34/1500 +RASH FEW040 BKN058TCU 16/07 Q1014 RETS WS RWY34 34231091 BECMG -SHRA SCT030CB

Detailed Explaination:

1.) Location Identifier: LOWW
The four-letter ICAO code of the observing location.

2.) Day of Month/Zulu Time: 011220Z

3.) Wind: 33007KT
Wind direction (true heading), rounded to the nearest ten degrees and always expressed as three digits. Direction can be given as VRB if wind direction is variable and wind speed is at most 3 knots.
plus
average wind speed of last 10 minutes in knots.
or
maximum gust wind speed in knots.
If it is calm, the wind is given as 00000KT.

4.) Variable Wind Direction: 280V020
This field is used if the total variation of wind direction during the last 10 minutes is 60 degrees or more and wind speed is more than 3 knots. The direction extrema are given in clockwise order

5.) Horizontal Visibility: 3000
Usually, only the minimum visibility is reported. If the minimum is less than 1500m and the maximum is over 5000m, the maximum visibility and its direction are indicated by a second visibility group following the minimum visibility.

6.) RVR Runway Visual Range: R34/1500
Runway designator and runway visibility in meters.

7.) Significant Weather: +RASH
Intensity is expressed by: + = heavy, - = light, nothing = moderate
Proximity is described by: VC = ViCinity (within 8km)

  BC = Banc - fog bench
  BL = Blowing
  DR = Drifting
  FZ = Freezing
  MI = Mince - thin fog layer
  SH = Shower
  TS = Thunderstorm
  DZ = Drizzle
  GR = Grêle - hail (diameter > 5mm)
  GS = Grêsil - hail (diameter < 5mm)
  IC = Ice Crystal
  PE = Ice Pellets
  RA = Rain
  SG = Snow Grains
  SN = Snow
  BR = Brume - mist (vis 1000 to 3000m)
  DU = Dust
  FG = Fog (vis < 1000m)
  FU = Fumée - smoke (vis < 3000m)
  HZ = Haze
  SA = Sand
  VA = Vulcanic Ashes
  DS = Dust Storm
  FC = Funnel Clouds
  PO = Dust Spins
  SQ = Squall
  SS = Sand Storm

8.) Clouds and Ceiling: FEW040 BKN058TCU

Cloud coverage:

  FEW = few - 1 to 2 octas
  SCT = scattered - 3 to 4 octas
  BKN = broken - 5 to 7 octas
  OVC = overcast - 8 octas

Cloud types:

  CB = cumulunimbus
  TCU = towering cumuli or cumulus congestus

Also common:

  SKC = Sky Clear (no clouds)
  OVC/// = clouds covering the sky and which base is below aerodrome level
  VV/// = sky not visible
  VV002 = vertical visibility is 200ft
  CAVOK = ceiling and visibility is OK (vis > 10km and SKC)

9.) Temperature and Dew Point: 16/07
The difference between temperature and dew pont is called "spread", the smaller the spread the higher the risk of precipitation.

10.) Pressure, QNH (altimeter setting): Q1014
QNH = 1014 hPa (hectopascals - 1hPa = 1mb - millibar)

11.) Recent Weather: RETS
Recent Thunderstorm
Also:

  RERA = recent rain
  RESN = recent snow
  NOSIG = no significant change

12.) Wind Shear: WS RWY34
Also:

  WS TKOF RWY 16 = windshear when taking of runway 16
  WS LDG RWY 34 = windshear when landing at runway 34
  WS ALL RWYS = windshear all runways

13.) Runway Status: 34231091
34 = runway 34
2 = wet
3 = covering 26 to 50% of runway surface
10 = 10mm thick
91 = braking action poor

Explaination:
1st and 2nd figure = runway designator
3rd figure = type of deposit on the runway

  0 = runway clean and dry
  1 = damp
  2 = wet
  3 = frost
  4 = snow
  5 = wet snow
  6 = slush
  7 = ice
  8 = compacted snow
  9 = snow drift
  / = unknown, removal in progress

4th figure = percentage of runway contamination

  1 = less than 10%
  2 = 11 to 25%
  3 = 26 to 50%
  4 = 51 to 100%
  / = unknown, removal in progress

5th and 6th figure = deposit thickness

  01 to 90 = millimeters
  92 = 10cm
  93 = 15cm
  94 = 20cm
  95 = 25cm
  96 = 30cm
  97 = 35cm
  98 = 40cm
  99 = unknown
  // = unable to measure

7th and 8th figure = braking action

  01 to 90 = coefficient 0.01 to 0.90
  or
  91 = poor
  92 = medium to poor
  93 = medium
  94 = medium to good
  95 = good
  99 = uncertain
  // = unknown

14.) Trend: BECMG -SHRA SCT030CB
Consists of following keywords and other METAR components:

  BECMG: becoming
  TEMPO: temporarily
  NOSIG: no significant change expected within 2 hours
  AT: at
  FM: from
  TL: until

15.) Remarks:
RMK followed by METAR components and miscellaneous abbreviations.


TAF Terminal Aerodrome Forecast
METAR describes the current weather conditions, a TAF message contains forecast information. Many of the elements are similar to those used in METARs. An example of a TAF message:

  LOWW 011400Z 011524 31008KT 9999 FEW040 BKN060 TX16/15Z TN10/24Z 
    TEMPO 1521 32013KT -SHRA BKN045 
    PROB30 
    TEMPO 1520 31015G25KT 6000 SHRA BKN040 FEW045TCU 
    BECMG 2324 CAVOK

The first two groups (LOWW 01140Z) are identical to METAR groups: location identifier and issuing day and time. The third group (011524) tells the period for which the forecast is given. The first two numbers denote day of month. The next four numbers give the validity hours. In this example, the forecast is valid from 15:00 to 24:00. After these code groups, a description of the forecast weather phenomena follows.

Working Tower Positions

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.

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 runway utilization concept for LOWW is based on the fact that the airport layout with its crossing runways normally does *not allow simultaneous approaches* to both runways. 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 (independent runway configuration).

Possible runway configurations are: ARR 11, DEP 16: SE winds, if no sim. apps possible* ARR 34, DEP 34: calm/NW winds ARR 16, DEP 29: calm/SW winds ARR 11/16 sim, DEP 16: calm/SE winds, if sim apps possible* * Simultaneous approaches to runways 11 and 16 are possible 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 possibly lead to a missed approach, aircrews are asked to inform ATC immediately.

Merging Departing and Arriving Traffic

• Wake Turbulence Separation
• Conditional Clearances

Study Guide: Airport Details

LOWW

WIEN SCHWECHAT

LOWL

LINZ HOERSCHING

Pisten in Linz

09-27

Beton mit 3 Kilometer Länge und 60 Meter Breite

Anflugverfahren

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)

09-27 Gras

Graspiste mit 660 Meter Länge und 45 Meter Breite. Gegenwärtig geschlossen (NOTAM B0257/08)

Anflugverfahren

Nur Sichtanflug!

LOWS

SALZBURG MAXGLAN

LOWI

INNSBRUCK KRANEBITTEN

LOWK

KLAGENFURT ALPE ADRIA AIRPORT

LOWG

GRAZ THALERHOF