VACC Austria DokuWiki - User contributions [en]

MediaWiki:Common.css

2022-06-08T22:28:09Z

Clemens Moritz:

/**
<pre> */
/***** BACKGROUND COLORS FOR NAMESPACES *****/

/* Colour of pseudo NS Special (light grey) */

.ns--2 #content, .ns--2 #p-cactions li, .ns--2 #p-cactions li a { background: #f4f4f4; }
.ns--2 div.thumb { border-color: #f4f4f4; }

/* Colour of NS Project + Project_talk (light sky blue) */

.ns-4 #content, .ns-4 #p-cactions li, .ns-4 #p-cactions li a { background: #f8fcff; }
.ns-4 div.thumb { border-color: #f8fcff; }

.ns-5 #content, .ns-5 #p-cactions li, .ns-5 #p-cactions li a { background: #f8fcff; }
.ns-5 div.thumb { border-color: #f8fcff; }

/* Colour of NS MediaWiki + MediaWiki_talk (light grey) */

.ns-8 #content, .ns-8 #p-cactions li, .ns-8 #p-cactions li a { background: #f4f4f4; }
.ns-8 div.thumb { border-color: #f4f4f4; }

.ns-9 #content, .ns-9 #p-cactions li, .ns-9 #p-cactions li a { background: #f4f4f4; }
.ns-9 div.thumb { border-color: #f4f4f4; }

/* Blue border for Public Domain namespaces. This is currently NS Help (but NOT Help_talk) */

.ns-12 #content {
border: 2px solid #0000CC; border-right: none;

background-image: url(http://upload.wikimedia.org/wikipedia/mediawiki/b/b8/PD-banner.png);
background-repeat: no-repeat;
background-position: right top;
}

.ns-12 #bodyContent {
background-image: url(http://upload.wikimedia.org/wikipedia/mediawiki/6/67/PD-icon-faded.png);
background-repeat: no-repeat;
background-position: right 5em;
}

/* Colour of NS Manual + Manual_talk (light bluish violet) */

.ns-100 #content, .ns-100 #p-cactions li, .ns-100 #p-cactions li a { background: #f3f3ff; }
.ns-100 div.thumb { border-color: #f3f3ff; }

.ns-101 #content, .ns-101 #p-cactions li, .ns-101 #p-cactions li a { background: #f3f3ff; }
.ns-101 div.thumb { border-color: #f3f3ff; }

/***** BACKGROUND AND BORDER COLORS FOR CONTENT *****/

/* Border colors */

.borderc1 { border-color: #e9e9e9; border-width:thin; } /* light grey */

.borderc2 { border-color: #aaaaaa; border-width:thin; } /* grey (as toc) */

.borderc3 { border-color: #777777; border-width:thin; } /* dark grey */

.borderc4 { border-color: #000000; border-width:thin; } /* black */

.borderc5 { border-color: #c00000; border-width:thin; } /* red */

.borderc6 { border-color: #025e9d; border-width:thin; } /* blue */

.borderc7 { border-color: #008040; border-width:thin; } /* green */

.borderc8 { border-color: #ffcc00; border-width:thin; } /* yellow */

/* Background colors */

.backgroundc1 { background-color: #ffffff; } /* white */

.backgroundc2 { background-color: #f9f9f9; } /* light grey (as toc) */

.backgroundc3 { background-color: #eeeeee; } /* light grey (headers) */

.backgroundc4 { background-color: #e0e0e0; } /* more grey */

.backgroundc5 { background-color: #d2d2d2; } /* more grey */

.backgroundc6 { background-color: #b7b7b7; } /* more grey */

.backgroundc7 { background-color: #a3a3a3; } /* darker grey */

/***** SOME OTHER SMALL THINGS *****/

/* Give a bit of space to the TOC */

#toc { margin: 1em 0; }

/* Marking redirects in Special:Allpages */

.allpagesredirect { font-style: italic; }

.watchlistredir { font-style: italic; }

/* Bug 1583 Printing of thumbnails */

div.tright { clear: right; }

/* SideBoxes ([[:de:Wikipedia:TownBox|TB]]) */

div.sideBox {
position: relative;
float: right;
background: white;
margin-left: 1em;
border: 1px solid gray;
padding: 0.3em;
width: 200px;
overflow: hidden;
clear: right;
}
div.sideBox dl {
padding: 0;
margin: 0 0 0.3em 0;
font-size: 96%;
}
div.sideBox dl dt {
background: none;
margin: 0.4em 0 0 0;
}
div.sideBox dl dd {
margin: 0.1em 0 0 1.1em;
background-color: #f3f3f3;
}

/* Major warning - used on the main page template to warn against editing carelessly, but can be used elsewhere as well */
.majorwarning {
background: yellow;
padding: 0.3em;
text-align: center;
font-size: 125%;
border: 2px solid red;
}

/******* MAIN PAGE STYLING **********/

#mainpage_topbox {
background: #f9f9f9;
padding: 0px;
border: 1px solid #aaaaaa;
margin: 0.2em 10px 10px;
}

.mainpage_boxtitle, .mainpage_hubtitle, #mainpage_pagetitle {
font-size: 105%;
padding: 0.4em;
background-color: #eeeeee;
border-bottom: 1px solid #aaaaaa;

}

.mainpage_boxtitle {
line-height: 120%;
}

#mainpage_pagetitle {
color: #cf7606;
font-size: 200% !important;
}

#mainpage_sitelinks {
padding: 0.2em;
text-align: center;
background-color: white;
}
.mainpage_hubtitle {
text-align: center;
}

.mainpage_boxcontents, .mainpage_boxcontents_small {
background: #ffffff;
padding:0.2em 0.4em;
}

.mainpage_boxcontents_small {
font-size: 95%;
}

.mainpage_hubbox, #mainpage_newscell, #mainpage_downloadcell {
padding: 0;
border: 1px solid #aaaaaa;
}

.mainpage_hubbox {
margin-bottom: 0;
}

#mainpage_newscell {
margin-bottom: 15px;
margin-top: 0 !important;
}

#mainpage_newscell .mainpage_boxtitle {
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Exquisite-khelpcenter.png/20px-Exquisite-khelpcenter.png);
background-repeat: no-repeat;
background-position: 99% 0.3em;
padding-right: 25px;
}

#mainpage_downloadcell {
width: 17em;
margin-bottom: 5px;
}

#mainpage_downloadcell .mainpage_boxtitle {
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Crystal_Clear_action_build.png/18px-Crystal_Clear_action_build.png);
background-repeat: no-repeat;
background-position: 96% 0.33em;
padding-right: 25px;
}

/* The words 'MediaWiki.org' in the title.*/
#mainpage_mwtitle {
color: #005288;
}

/********* Extension Infobox Styling ***********/

.ext-infobox {
border: 2px solid #aaaaaa;
width: 272px;
float: right;
margin: 0 0 0.5em 0.5em;
border-collapse: collapse;
background-color: white;
}

.ext-infobox td {
border: 2px none #aaaaaa;
padding: 0.2em 0.5em;
border-bottom: 1px solid #f0f0f0 !important;
}

.ext-header {
background-color: #aaaaaa;
color: white;
text-align: left;
}
.ext-header td {
padding-top: 0.5em;
}

.ext-header img {
padding: 0 0.2em 0 0.5em;
}

.ext-status-unstable, .ext-status-unstable td {
border-color: #990000;
}
.ext-status-unstable .ext-header {
background-color: #990000;
color: #ffff00;
}

.ext-status-experimental, .ext-status-experimental td {
border-color: #CC6600;
}
.ext-status-experimental .ext-header {
background-color: #CC6600;
}

.ext-status-beta, .ext-status-beta td {
border-color: #000099;
}
.ext-status-beta .ext-header {
background-color: #000099;
}

.ext-status-stable, .ext-status-stable td {
border-color: #009900;
}
.ext-status-stable .ext-header {
background-color: #009900;
}

/**** prettify [[Extension Matrix]] ****/

.xm-table {
border: 1px solid #666666;
background-color: white;
}

.xm-table td, .xm-table th {
vertical-align: top;
text-align: left;
border: none;
background-color: #EEEEEE;
}

.xm-table th {
font-weight: bold;
}

.xm-name { font-weight: bold; }

.xm-status-unknown { color:#888888; }
.xm-status-experimental { color:red; }
.xm-status-beta { color:blue; }
.xm-status-stable { color:green; }

.xm-type-unknown { color:#888888; }

.xm-name, .xm-status, .xm-type, .xm-version, .xm-updated { white-space: nowrap; }

.xm-updated { font-size:80%; }

.xm-alert { background-color: yellow; }

td.xm-blank { background-color: inherit; }
td.xm-updated { background-color: inherit; }

td.xm-description {
background-color: inherit;
font-style: italic;
}

th.xm-blank, th.xm-updated, th.xm-description {
background-color: inherit;
padding-bottom:0.6ex;
border-bottom: 1px solid #666666;
}

th.xm-description {
font-style: italic;
}

/** GENERAL PURPOSE PRETTY TABLES */
table.datatable {
background-color: transparent;
}
table.datatable th, table.datatable td {
padding: 4px;
}
table.datatable th {
text-align: left;
background-color: #999999;
}
table.datatable tr {
background-color: #CCCCCC;
}
table.datatable tr:hover {
background-color: #FFFFCC;
}

/* wikitable/prettytable class for skinning normal tables */
table.wikitable,
table.prettytable {
margin: 1em 1em 1em 0;
background: #f9f9f9;
border: 1px #aaa solid;
border-collapse: collapse;
empty-cells:show;
}

table.wikitable th, table.wikitable td,
table.prettytable th, table.prettytable td {
border: 1px #aaa solid;
padding: 0.2em 0.4em;
}

table.wikitable th, table.wikitable td.hl3, table.wikitable th.hl3,
table.prettytable th, table.prettytable td.hl3, table.wikitable th.hl3 {
background: #8da7d6;
text-align: center;
}

table.wikitable td.hl1, table.wikitable th.hl1,
table.prettytable td.hl1, table.wikitable th.hl1 {
background: #c5d8fc;
text-align: center;
}

table.wikitable td.hl2, table.wikitable th.hl2,
table.prettytable td.hl2, table.wikitable th.hl2 {
background: #a7c1f2;
text-align: center;
}

table.wikitable caption,
table.prettytable caption {
margin-left: inherit;
margin-right: inherit;
font-weight: bold;
}

/** Sidebar External Links **/

#n-browse-cvs a, #n-phpdoc a, #n-Mailing-list a {
background: url(/skins-1.5/monobook/external.png) center right no-repeat;
padding-right: 13px;
color: #36b;
}

/* make the list of references look smaller */
ol.references {
font-size: 100%;
}

.references-small { font-size: 90%;}

/* prevent ugly horizontal page expansion */
pre { overflow: auto; }

/**** Version box on [[Manual:Downloading MediaWiki]] ****/

#DownloadVersionBox {
border: 2px solid black;
border-collapse: collapse;
margin: auto;
width: 50%;
color: black;
}

#DownloadVersionBox td {
border: 2px solid black;
padding: 20px;
}

/*** More whitespace on search page ***/
.page-Special_Search #search {
padding: 1em 0 2em 0;
}

.page-Special_Search #powersearch {
border: 1px solid #CCCCCC;
padding: 0.5em 0.5em;
}

.page-Special_Search #powersearch-namespaces {
padding-left: 1em;
margin: 0.7em 0;
}

.page-Special_Search #powersearch-namespaces label {
white-space: nowrap;
min-width: 8.4em;
display: block;
float: left;
}

/* Clear search button, but not check-boxes: */
.page-Special_Search br {
clear: left;
}

/**
* Cute little "tip" boxes
*/
div.tip {
padding: 4px;
margin-top: 4px;
margin-bottom: 4px;
min-height: 30px; /* IE users will hate this... */
}
div.tip-info {
border: 1px solid #CC9933;
background-color: #CCCC99;
}
div.tip-gotcha {
border: 1px solid #CC0000;
background-color: #CC6666;
}

/* Some styling for special page navigation */

.sp-cached {
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Clock%20and%20warning.svg/20px-Clock%20and%20warning.svg);
background-position: 5px 3px;
background-repeat: no-repeat;
padding: 4px 0 4px 30px;
font-style: italic;
color: #606000;
margin: 0.3em 0;

border: 1px solid #EEEE80;
background-color: #FFFFE0;
}

.SpecialPageInfo {
background-color: #f9f9f9;
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Exquisite-khelpcenter.png/35px-Exquisite-khelpcenter.png);
background-position: 0.8em 0.5em;
background-repeat: no-repeat;

padding: 0.3em 0.5em 0.3em 5.0em;

border-color: #025e9d;
border-width: 1px;
border-style: solid;
border-bottom-width: medium;

margin-bottom: 1em;
}

#searchresulttext {
background-image: url(http://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/Exquisite-kfind.png/45px-Exquisite-kfind.png);
}

.mw-viewprevnext {
display: block;
border: 1px solid #CCCCCC;
background-color: #F9F9F2;
padding: 0.2em 0.4em;
}

/* Language template */

.LanguageLinks {
margin-top: 0.5em;
}

.LanguageLinks table {
clear: both;
border: 1px solid #aaaaaa;
border-collapse: collapse;
padding: 0.2em;
margin: 0;
font-size: 85%;
margin: 0 1px;
}

.LanguageLinks span {
white-space: nowrap;
}

/* Page headings used throughout the wiki (though not very much at the time of writing...) */
.page-notice, .page-warning {
border-width: 1px;
border-style: solid;

padding: 0.3em 0.5em;
margin-bottom: 1em;

width: 80%;
margin-left: auto;
margin-right: auto;

text-align: center;
}

/* Used to add informative notices to the top of pages - BLUE */
.page-notice {
background-color: #f9f9f9;
border-color: #025e9d;
text-align: left;
}

/* Used to add warning information to the top of pages - RED */
.page-warning {
background-color: #ffffff;
border-color: #c51919;
border-width: 2px;
}

.pw-head {
color: #c51919;
font-weight: bold;
}

/* Coloured watchlist / Special:Recentchanges numbers */
.mw-plusminus-pos {
color: #006400; /* darkgreen */
}

/* .mw-plusminus-null currently at developer default */

.mw-plusminus-neg {
color: #8B0000; /* darkred */
}

/* extra buttons for edit dialog */
/* from commons:MediaWiki:Common.css */

.my-buttons {
padding: 0.5em;
}
.my-buttons a {
color: black;
background-color: #ccddee !important;
font-weight: bold;
font-size: 0.9em;
text-decoration: none;
border: thin #006699 outset;
padding: 0 0.1em 0.1em 0.1em;
}
.my-buttons a:hover, .my-buttons a:active {
background-color: #bbccdd;
border-style: inset;
}

/* from [[User:Splarka/Help:Linked images]] */
.imagelink_wikilogo a {
width:135px;
height:135px;
display:block;
text-decoration:none;
background-image: url("http://upload.wikimedia.org/wikipedia/mediawiki/b/bc/Wiki.png")
}

.hidden {
display:none
}

/* Infobox template style */
.infobox {
border: 1px solid #aaa;
background-color: #f9f9f9;
color: black;
margin: 0.5em 0 0.5em 1em;
padding: 0.2em;
/* @noflip */
float: right;
/* @noflip */
clear: right;
text-align: left;
font-size: 88%;
line-height: 1.5em;
}
.infobox caption {
font-size: 125%;
font-weight: bold;
}
.infobox td,
.infobox th {
vertical-align: top;
}
.infobox.bordered {
border-collapse: collapse;
}
.infobox.bordered td,
.infobox.bordered th {
border: 1px solid #aaa;
}
.infobox.bordered .borderless td,
.infobox.bordered .borderless th {
border: 0;
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.infobox.sisterproject {
width: 20em;
font-size: 90%;
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.infobox.standard-talk {
border: 1px solid #c0c090;
background-color: #f8eaba;
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.infobox.standard-talk.bordered td,
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/* styles for bordered infobox with merged rows */
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border: 0;
border-top: 1px solid #aaa;
border-right: 1px solid #aaa;
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.infobox.bordered .mergedrow td,
.infobox.bordered .mergedrow th {
border: 0;
border-right: 1px solid #aaa;
}

/* Styles for geography infoboxes, eg countries,
country subdivisions, cities, etc. */
.infobox.geography {
/* @noflip */
text-align: left;
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line-height: 1.2em;
font-size: 90%;
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.infobox.geography td,
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padding: 0.4em 0.6em 0.2em 0.6em;
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.infobox.geography .mergedrow td,
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.infobox.geography .mergedbottomrow td,
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.infobox.geography .maptable td,
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padding: 0;
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.mw-wiki-logo {
background-size: contain;
}

/** </pre>
*/

Main Page

2021-02-21T11:31:26Z

Clemens Moritz: Changed protection level for "Main Page" ([Edit=⧼protect-level-main-page-edit⧽] (indefinite) [Move=⧼protect-level-main-page-edit⧽] (indefinite))

{| width="100%" cellspacing="8"
|-
| colspan="2" |
== Welcome to VACC Austria's DokuWiki ==

Hello and welcome to the documentation system of VACC Austria. We use this system to provide you the documentation you need to control or sometimes to fly in virtual Austrian airspace. If you have any question about Austrian airspace or our procedures then you should be good to find this information here.
But of course, such a project cannot be maintained by some few members - this project needs the help of everyone. So if you have some information that would fit into this Wiki then do not hesitate to add a new page or edit an existing. You have to be logged in for that, how to login is described later. If you need help on how to edit an article you can find all necessary information [[Help|Help]].

== Overview ==

|-
| width="50%" style="vertical-align:top;" |
=== About our Wiki ===

Currently there are {{NUMBEROFARTICLES}} Articles in this Wiki, which are maintained by {{NUMBEROFUSERS}} registered users. Until now they changed them {{NUMBEROFEDITS}} times. For a small overview about our Wiki we ask you to use following links:

*[[Special:AllPages|Index of all pages]]
*[[Special:NewPages|New pages]]
*[[Special:Categories|Categories]]

A complete list of automatically generated lists can be found [[Special:SpecialPages|here]].

| width="50%" style="vertical-align:top;" |

=== How to enter this wiki ===

Everybody is allowed to read this wiki, but changes are only allowed for registered users of VACC Austria. Your personal login information can be requested on our [http://www.vacc-austria.org homepage], it is as the same as the login for our website. Registering for our Wiki only is not possible. If you are logged in some pages are locked for editing too because they are system pages and can only be edited by our admins.
|}

{| width="100%" cellspacing="8"
|-
| colspan="2" |
== Important information and documents ==

|-
| width="50%" style="vertical-align:top;" |
=== '''Main airports in Austria:''' ===

*[[Vienna]] ([[LOWW]])
*[[Innsbruck]] ([[LOWI]])
*[[Salzburg]] ([[LOWS]])
*[[Linz]] ([[LOWL]])
*[[Klagenfurt]] ([[LOWK]])
*[[Graz]] ([[LOWG]])

=== '''Letters of Agreement:''' ===

*[https://downloads.vacc-austria.org/LoA/LoA_LOVV_LKAA_15FEB2017.pdf LKAA]
*[[LHCC]]
*[[EDDM]]

| width="50%" style="vertical-align:top;" |

=== '''Documents for Pilots:''' ===

*[[Example Flight]]
*[http://downloads.vacc-austria.org/Documents/VATSIM_mit_X-Plane.pdf XSquawkbox Quick Tutorial (german)]

=== '''Documents for Controllers:''' ===
*[[Study Guide:Euroscope]]
*[[Study Guide]]
*[[Squawk Codes]]
*[[ATC academy]]
*[[Flight Level Allocation Scheme]]
*[[Radio Procedures for Controllers]]

|}

{{Hide_in_print|__notoc__}}

2014-07-24T19:33:29Z

Clemens Moritz: SMS Plugin in action with description of information displayed.

SMS Plugin in action with description of information displayed.

2011-12-02T23:52:37Z

Clemens Moritz: Extracted Delivery parts from Tower Study Guide.

'''This study guide is still work in progress. Stay tuned for further chapters.'''

==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 is 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:
#''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.
#''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.
#''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, established ILS 34
'''LOWW_TWR:''' Austrian 251, Wien Tower, continue approach
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 Altitude 5000 feet, QNH 1019.
'''AUA251:''' Turn left heading 290, descending altitude 5000 feet QNH 1019, AUA251
 
'''LOWW_GND:''' OE-DLT, taxi to Holding Point Runway 29 via Exit 12, M and A1, QNH 1019, 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==
As airports grew bigger over time also the workload for the Air Traffic Controller handling the traffic got bigger. Soon it was necessary to distribute this workload onto more than one controller in order to be able to cope with the traffic.

So the Tower Position got divided into thre basic types with different areas of responsibility.

* Clearance delivery (DEL), responsible for checking flightplans and issuing IFR clearances to departing aircraft.
* Ground (GND), responsible for all traffic on the apron and the taxiways.
* Tower (TWR), responsible for movements on the runway and within its associated Control Zone.
Because Tower and Ground controllers rely very strongly on what they see out of their window, these are the positions which are situated within the airports control tower.

Apart from that there are the controllers who manage the traffic once it has left the control zone. They are again divided into:
* APP Positions, managing the traffic within the airports vicinity (the so called TMA, Terminal Area). In Austria they are situated directly at the airports.
* ACC (Area Control Center, on VATSIM the abbreviation CTR is used) positions, which are responsible for enroute traffic. They reside in Vienna.

Since they all use their radar to control air traffic, they are also called Radar positions.

==Working Delivery Positions==
Clearance Delivery is responsible for checking and correcting flightplans of departing aircraft and issue routing clearances to them.
===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.

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. This is a routing from Vienna

[[Image:Route.jpg]]

===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) = given with taxi clearance
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 clearance:
Callsign, cleared to XXXX via XXXXX XX departure, (initial climb 5000ft), Squawk 46XX
Example:
Austrian 125, cleared to Frankfurt via LUGIM 1C departure, initial climb 5000ft,
Squawk 4601.
Some Aircraft are not able to follow SIDs for various reasons, most of the time due to missing equipment. In these cases you should issue a so called vectored departure. A vectored departure clearance includes the same components as a normal clearance but instead of the SID you issue instructions to be carried out after departure. In this case the initial climb altitude is mandatory.
Callsign,cleared to XXXX, after departure RWY XX, XXXXXXX, initial climb 5000ft,
Squawk 46XX

Example:
Austrian 125, cleared to Frankfurt, after departure Runway 29, turn left heading 240
expect vectors to LUGIM, initial climb 5000 ft, Squawk 4601.
You can find the instructions for each Airport within the [[Study Guide:Airport Details]]
If the pilot responds with a correct readback you should answer with the following phrase:
Callsign, readback correct. Austrian 125, readback correct /(readback was correct)
Afterwards you either hand the pilot over to GND or wait for his startup request, depending on local procedures.

===Special Situations (High Traffic, Slots, ...)===
====Slots====
In order to guarantee a safe flow of traffic and to minimize delays in the air so called slots are being used. A slot is a timeframe of five minutes before to ten minutes after the CTOT mentioned before. The aircraft has to depart within this timeframe from its departure airport.
On the VATSIM network this system is only used on special occasions.

==== Verhalten in Situationen mit erhöhtem Verkehrsaufkommen ====
Sometimes one of your neighboring sectors has to stop accepting traffic. In these cases you should delay an aircrafts start-up clearance.

If possible you should inform the pilot about the expected delay:
Austrian 125, readback correct, expect startup in 10 minutes.
Austrian 125, startup approved, expect departure in 10 minutes.

===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:'''
{| class="prettytable"
|-
|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:
{| class="prettytable"
|-
|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.
|}

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