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<title>Željava Air Base</title>
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</style><table class="infobox vcard"><tbody><tr><th colspan="2" class="infobox-above" style="background-color: #DDDDFF; color: black; font-size: 125%"><div style="display:inline;" class="fn org">Željava Airport</div><br><div style="display:inline;" class="nickname"><i>Aerodrom Željava</i></div></th></tr><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"></span><div class="infobox-caption">Airport's runway</div></td></tr><tr style="font-weight:bold;"><td colspan="2" class="infobox-full-data"><style data-mw-deduplicate="TemplateStyles:r1129693374">
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</style><div class="hlist"><ul><li><span class="nowrap"><a href="IATA_airport_code" title="IATA airport code">IATA</a>: <i>none</i></span></li><li><span class="nowrap"><a href="ICAO_airport_code" title="ICAO airport code">ICAO</a>: <span class="nickname">LYBI</span></span></li></ul></div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #DDDDFF; color: black">Summary</th></tr><tr><th scope="row" class="infobox-label">Airport type</th><td class="infobox-data category"><a href="Military_air_base" class="mw-redirect" title="Military air base">Military air base</a></td></tr><tr><th scope="row" class="infobox-label">Serves</th><td class="infobox-data"><a href="Biha%C4%87" title="Bihać">Bihać</a>, <span class="flagicon nowrap"><span class="mw-image-border" typeof="mw:File"><span></span></span> </span><a href="Bosnia_and_Herzegovina" title="Bosnia and Herzegovina">Bosnia and Herzegovina</a></td></tr><tr><th scope="row" class="infobox-label">Location</th><td class="infobox-data label"><a href="%C5%BDeljava" title="Željava">Željava</a>, <span class="flagicon nowrap"><span class="mw-image-border" typeof="mw:File"><span></span></span> </span><a href="Croatia" title="Croatia">Croatia</a></td></tr><tr><th scope="row" class="infobox-label">Elevation&nbsp;<a href="Height_above_sea_level" class="mw-redirect" title="Height above sea level">AMSL</a></th><td class="infobox-data">1,126&nbsp;ft / 343&nbsp;m</td></tr><tr><th scope="row" class="infobox-label"><a href="Geographic_coordinate_system" title="Geographic coordinate system">Coordinates</a></th><td class="infobox-data"><span class="geo-inline"><style data-mw-deduplicate="TemplateStyles:r1156832818">
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</style><span class=" nourlexpansion"><a class="external text" href="geo:44.83638888888889,15.758055555555556"><span class="geo-default"><span class="geo-dms" title="Maps, aerial photos, and other data for this location"><span class="latitude">44°50′11″N</span> <span class="longitude">15°45′29″E</span></span></span><span class="geo-multi-punct"> / </span><span class="geo-nondefault"><span class="geo-dec" title="Maps, aerial photos, and other data for this location">44.83639°N 15.75806°E</span><span style="display:none"> / <span class="geo">44.83639; 15.75806</span></span></span></a></span></span></td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #DDDDFF; color: black">Map</th></tr><tr><td colspan="2" class="infobox-full-data"><div class="switcher-container"><style data-mw-deduplicate="TemplateStyles:r1291884410">
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</style><div class="center"><div class="locmap" style="width:250px;float:none;clear:both;margin-left:auto;margin-right:auto"><div style="width:250px;padding:0"><div style="position:relative;width:250px"><span class="notpageimage noviewer" typeof="mw:File"></span><div class="od notheme" style="top:41.779%;left:39.089%;font-size:91%"><div class="id" style="left:-5px;top:-5px"><span class="notpageimage noviewer" typeof="mw:File"><span title="LYBI"></span></span></div><div class="pr" style="width:6em;left:6px"><div>LYBI</div></div></div></div><div style="padding-top:0.2em"></div><span class="switcher-label" style="display:none">Show map of Croatia</span></div></div></div><div class="center"><div class="locmap" style="width:250px;float:none;clear:both;margin-left:auto;margin-right:auto"><div style="width:250px;padding:0"><div style="position:relative;width:250px"><span class="notpageimage noviewer" typeof="mw:File"></span><div class="od notheme" style="top:18.787%;left:5.865%;font-size:91%"><div class="id" style="left:-5px;top:-5px"><span class="notpageimage noviewer" typeof="mw:File"><span title="LYBI"></span></span></div><div class="pr" style="width:6em;left:6px"><div>LYBI</div></div></div></div><div style="padding-top:0.2em"></div><span class="switcher-label" style="display:none">Show map of Bosnia and Herzegovina</span></div></div></div></div></td></tr><tr><td colspan="2" class="infobox-full-data"></td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #DDDDFF; color: black"><a href="Runway" title="Runway"><span style="background-color: #DDDDFF; color:black;">Runways</span></a>
</th></tr><tr><td colspan="2" class="infobox-full-data">
<table style="width:100%; margin:-2px -1px -1px -1px; border-spacing:0;">

<tbody><tr style="background-color: #e6e6ff;color:inherit;">
<th rowspan="2" style="width: 15%; border:solid 1px #fafafa; border-width:0 1px 0 0; text-align: center;"><a href="Runway#Naming" title="Runway">Direction</a>
</th>
<th colspan="2" style="width: 50%; border:solid 1px #fafafa; border-width:0 1px 1px 1px; text-align: center;">Length
</th>
<th rowspan="2" style="width: 35%; border:solid 1px #fafafa; border-width:0 0 0 1px; text-align: center;">Surface
</th></tr>
<tr style="background-color: #e6e6ff;color:inherit;">
<th style="width: 20%; border:solid 1px #fafafa; border-width:1px 1px 0 1px; text-align: center;">ft
</th>
<th style="width: 20%; border:solid 1px #fafafa; border-width:1px 1px 0 1px; text-align: center;">m
</th></tr>
<tr>
<td style="text-align: center;">14L/32R (Croatia)
</td>
<td style="text-align: center;">8,325
</td>
<td style="text-align: center;">2,500
</td>
<td style="text-align: center;"><a href="Airport_runway" class="mw-redirect" title="Airport runway">Asphalt</a>
</td></tr>
<tr>
<td style="text-align: center;">14R/32L (Croatia &amp; <a href="Bosnia_and_Herzegovina" title="Bosnia and Herzegovina">BiH</a>)
</td>
<td style="text-align: center;">8,325
</td>
<td style="text-align: center;">2,500
</td>
<td style="text-align: center;">Asphalt
</td></tr>
<tr>
<td style="text-align: center;">08R/26L (Croatia &amp; BiH)
</td>
<td style="text-align: center;">6,863
</td>
<td style="text-align: center;">2,061
</td>
<td style="text-align: center;">Asphalt
</td></tr>
<tr>
<td style="text-align: center;">01/19 (Croatia)
</td>
<td style="text-align: center;">9,257
</td>
<td style="text-align: center;">2,780
</td>
<td style="text-align: center;">Asphalt
</td></tr>
<tr>
<td style="text-align: center;">08L/26R (BiH &amp; Croatia)
</td>
<td style="text-align: center;">6,826
</td>
<td style="text-align: center;">2,050
</td>
<td style="text-align: center;">Asphalt
</td></tr>













</tbody></table></td></tr></tbody></table>
<p><b>Željava Air Base</b>, situated on the border between <a href="Croatia" title="Croatia">Croatia</a> and <a href="Bosnia_and_Herzegovina" title="Bosnia and Herzegovina">Bosnia and Herzegovina</a> under the <span title="Serbo-Croatian-language text"><span lang="sh" style="font-style: normal;"><a href="Gola_Plje%C5%A1evica" class="mw-redirect" title="Gola Plješevica">Gola Plješevica</a></span></span> mountain, near the city of <a href="Biha%C4%87" title="Bihać">Bihać</a>, was the largest <a href="Underground_hangar" title="Underground hangar">underground hangar</a> and <a href="Military_air_base" class="mw-redirect" title="Military air base">military air base</a> in the <a href="SFR_Yugoslavia" class="mw-redirect" title="SFR Yugoslavia">Socialist Federal Republic of Yugoslavia</a> (SFRY), and one of the largest in Europe. The facilities are shared by the local governments of Bihać and <a href="Lika-Senj_County" title="Lika-Senj County">Lika-Senj County</a> of Croatia.
</p>
<meta property="mw:PageProp/toc">
<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>
<p>The "Objekat" series of military installations can be found in secluded but strategically important areas within the former Yugoslavia, and the construction of these military bases was initialized by the SFRY's defence ministry.
</p><p>During the Yugoslav Wars, most of these bases were used by the Serbs in certain operations, but due to extenuating circumstances imposed by the Croat forces, they were destroyed and later rendered useless for military use.
</p><p>Nowadays, they are popular for <a href="Urban_exploration" title="Urban exploration">urban exploration</a>, although it is risky due to the possibility of <a href="Anti-personnel_landmines" class="mw-redirect" title="Anti-personnel landmines">anti-personnel landmines</a> being located in unexplored areas.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> However, some were spared the destruction due to other circumstances where the Serbs did not control these installations. An example of some that are still in use is the <a href="Armijska_Ratna_Komanda_D-0" title="Armijska Ratna Komanda D-0">D-0 Armijska Ratna Komanda nuclear bunker in Konjic</a>, however the latter was turned into an art complex, but is still owned by the <a href="Ministry_of_Defence_(Bosnia_and_Herzegovina)" title="Ministry of Defence (Bosnia and Herzegovina)">Ministry of Defence of Bosnia and Herzegovina</a>.
</p><p>The construction of the Željava or Bihać Air Base (<a href="Code-name" class="mw-redirect" title="Code-name">code named</a> <i><b>"Objekat 505"</b></i>) was inspired by mountain hangars used by the Swedish <a href="G%C3%B6ta_Wing" title="Göta Wing">Göta Wing</a> (F 9),<sup id="cite_ref-lybi_2-0" class="reference"><a href="#cite_note-lybi-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> began in 1948 and was completed in 1968. During those two decades, SFRY spent approximately $6 billion on its construction,<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> three times the combined current annual military budgets of Serbia and Croatia. It was one of the largest and most expensive military construction projects in Europe.
</p><p>The airfield was documented by American <a href="CORONA_(satellite)" title="CORONA (satellite)">CORONA</a> satellite reconnaissance in 1968.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading3"><h3 id="Description">Description</h3></div>
<p>The role of the facility was to establish, integrate and coordinate a nationwide <a href="Early_warning_radar" class="mw-redirect" title="Early warning radar">early warning radar</a> network in SFRY akin to <a href="NORAD" title="NORAD">NORAD</a> in the US. The complex was designed and built to sustain a direct hit from a 20-<a href="Kiloton" class="mw-redirect" title="Kiloton">kiloton</a> <a href="Nuclear_bomb" class="mw-redirect" title="Nuclear bomb">nuclear bomb</a>, equivalent to that dropped on <a href="Atomic_bombings_of_Hiroshima_and_Nagasaki" title="Atomic bombings of Hiroshima and Nagasaki">Nagasaki</a>.
</p>
<div class="mw-heading mw-heading4"><h4 id="Strategic_role">Strategic role</h4></div>
<p>The main advantage of the base was the strategic location of its <i>"Celopek"</i> intercept and surveillance radar on Mount <span title="Serbo-Croatian-language text"><span lang="sh" style="font-style: normal;">Plješevica</span></span>, at the nerve center of an advanced integrated air defence network covering the airspace and territory of Yugoslavia, and possibly further. In addition to its main roles as a protected radar installation, control centre, and secure communications facility, the airbase contained tunnels housing two full fighter <a href="Squadron_(aviation)" title="Squadron (aviation)">squadrons</a>, one reconnaissance squadron, and associated maintenance facilities. The units based there were the 124.LAE (Fighter Aviation Squadron) and 125.LAE, both equipped with <a href="Mikoyan-Gurevich_MiG-21_variants" class="mw-redirect" title="Mikoyan-Gurevich MiG-21 variants">MiG-21bis</a> fighter aircraft, and the 352.IAE (Reconnaissance Aviation Squadron), equipped with MiG-21R reconnaissance-fighter aircraft.
</p><p>The tunnels had a total length of 3.5&nbsp;km (2.2&nbsp;mi), and the bunker had four entrances protected by 100-ton pressurized doors, three of which were customized for use by <a href="Fixed-wing_aircraft" title="Fixed-wing aircraft">fixed-wing aircraft</a>. Eventually, it was hoped that the base would be re-equipped with the indigenously developed <a href="Novi_Avion" title="Novi Avion">Yu Supersonik</a> aircraft.
</p>
<div class="mw-heading mw-heading4"><h4 id="Underground_&quot;KLEK&quot;_complex">Underground "KLEK" complex</h4></div>
<p>The underground facility was lined with semicircular concrete shields, to cushion the impact of incoming munitions. The complex included an underground water source, power generators, crew quarters, and other strategic military facilities. It also housed a <a href="Cafeteria" title="Cafeteria">mess hall</a> that could feed 1,000 people simultaneously, along with stores of food, fuel and arms sufficient to last 30 days. Fuel was supplied by a 20&nbsp;km (12&nbsp;mi) underground pipe network connected to a military warehouse on Pokoj Hill near <a href="Biha%C4%87" title="Bihać">Bihać</a>.
</p>
<div class="mw-heading mw-heading4"><h4 id="Surface">Surface</h4></div>
<p>Above ground, the facility had five runways and within the immediate vicinity of the base, there were numerous short-range mobile tracking and targeting radars; <a href="Surface-to-air_missile" title="Surface-to-air missile">surface-to-air missile</a> sites equipped with; <a href="2K12_Kub" title="2K12 Kub">2K12 "Kub"</a> (NATO: SA-6) mobile surface-to-air missile interceptor systems, motorized infantry bases, two <a href="Quick_Reaction_Alert" title="Quick Reaction Alert">Quick Reaction Alert</a> aircraft ready for take off at any moment, military police stations, and a hunting lodge used by civilian and military leaders on occasional leisure trips.
</p><p>Access points were heavily monitored and guards were authorized to fire upon anyone attempting to enter without authorization. However, in practice only special permits were required and unauthorized visitors usually turned away.
</p>
<div class="mw-heading mw-heading3"><h3 id="Destruction">Destruction</h3></div>
<p>The airbase was used intensively in 1991, during the <a href="Yugoslav_Wars" title="Yugoslav Wars">Yugoslav Wars</a>. During its <a href="Withdrawal_(military)" title="Withdrawal (military)">withdrawal</a>, the <a href="Yugoslav_People's_Army" title="Yugoslav People's Army">Yugoslav People's Army</a> destroyed the runway by filling pre-built spaces (designed for the purpose) with explosives and detonating them. To prevent any possible further use of the complex by Croatian and Bosnia-Herzegovinan forces, the <a href="Serbian_Army_of_Krajina" title="Serbian Army of Krajina">Serbian Army of Krajina</a> completed the destruction in 1992 by setting off an additional 56 tonnes of explosives. The ensuing explosion was so powerful that it shook the nearby city of Bihać. Residents of nearby villages claimed that smoke continued to rise from the tunnels for six months after the explosion. The order for the destruction was issued by serb colonel Milan Meničanin.
</p>
<div class="mw-heading mw-heading3"><h3 id="Current_status">Current status</h3></div>
<p>Local police forces and the CPA currently use the area to train canines with actual land mines, given the extensive number of mines still in the vicinity. Because of the mines, extreme caution must be used when visiting the Željava complex. In November 2000, a <a href="Air_Force_and_Anti-Aircraft_Defence_of_Bosnia_and_Herzegovina" title="Air Force and Anti-Aircraft Defence of Bosnia and Herzegovina">Bosnian Air Force</a> major died after setting off a PROM-2 anti-personnel mine while searching for mushrooms.
</p><p>The toll of the destruction on base buildings and equipment is incalculable and caused great environmental damage. Potential reconstruction endeavors are limited by a lack of financial resources. An international border bisects the base area, and the entire area is heavily mined. The barracks in the nearby village of <a href="Li%C4%8Dko_Petrovo_Selo" title="Ličko Petrovo Selo">Ličko Petrovo Selo</a> are operated by the <a href="Croatian_Army" title="Croatian Army">Croatian Army</a>.
</p><p>Today, the base is a common waypoint for illegal migrants. A facility for asylum seekers was scheduled to open there in 2004 or 2005, but the idea was abandoned, and new plans were developed for it to become part of the <a href="Slunj" title="Slunj">Slunj</a> military training grounds, and barracks from the nearby <a href="Udbina" title="Udbina">Udbina</a> complex. However, this idea was dropped in line with the agreement between the countries of former Yugoslavia which bans any military facility up to 15&nbsp;km (9.3&nbsp;mi) inside the borders.
</p><p>The Bihać Municipality launched an initiative to open a local airport using the runway.
</p>
<div class="mw-heading mw-heading2"><h2 id="Gallery">Gallery</h2></div>
<ul class="gallery mw-gallery-packed">
<li class="gallerybox" style="width: 228px">
<div class="thumb" style="width: 226px;"><span typeof="mw:File"></span></div>
<div class="gallerytext">Entrances to the underground complex</div>
</li>
<li class="gallerybox" style="width: 227.33333333333px">
<div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"></span></div>
<div class="gallerytext">Underground mechanic room</div>
</li>
<li class="gallerybox" style="width: 227.33333333333px">
<div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"></span></div>
<div class="gallerytext"><a href="Bomb" title="Bomb">Bomb</a> and <a href="Missile" title="Missile">missile</a> storage</div>
</li>
<li class="gallerybox" style="width: 227.33333333333px">
<div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"></span></div>
<div class="gallerytext">Hallway</div>
</li>
<li class="gallerybox" style="width: 227.33333333333px">
<div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"></span></div>
<div class="gallerytext">Abandoned <a href="Douglas_C-47" class="mw-redirect" title="Douglas C-47">Douglas C-47</a></div>
</li>
<li class="gallerybox" style="width: 227.33333333333px">
<div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"></span></div>
<div class="gallerytext">Destroyed reconnaissance photo laboratory</div>
</li>
</ul>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Armijska_Ratna_Komanda_D-0" title="Armijska Ratna Komanda D-0">Armijska Ratna Komanda D-0</a></li>
<li><a href="Slatina_Air_Base" title="Slatina Air Base">Slatina Air Base</a></li>
<li><a href="Yugoslav_Air_Force" title="Yugoslav Air Force">Yugoslav Air Force</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><cite id="CITEREFMarkov2023" class="citation web cs1 cs1-prop-foreign-lang-source">Markov, Sara (2023-04-09). <a rel="nofollow" class="external text" href="https://www.journal.hr/lifestyle/putovanja/zeljava-aerodrom-vojna-baza-plitvicka-jezera-bihac/">"Napušteni aerodrom kod Plitvica je super ideja za jednodnevni izlet"</a>. <i>Journal.hr</i> (in Croatian)<span class="reference-accessdate">. Retrieved <span class="nowrap">2025-03-28</span></span>.</cite></span>
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<li id="cite_note-lybi-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-lybi_2-0">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.zeljava-lybi.com/opis_eng.html">"Zeljava-jna_jedinice"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">27 April</span> 2017</span>.</cite></span>
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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nsarchive2.gwu.edu/NSAEBB/NSAEBB439/docs/Underground-Doc4.pdf">"Underground Aircraft Dispersal Bihac Airfield, Yugoslavia 44-50N 015-47E"</a> <span class="cs1-format">(PDF)</span>. <i><a href="National_Geospatial-Intelligence_Agency" title="National Geospatial-Intelligence Agency">National Photographic Interpretation Center</a></i>. June 17, 1968<span class="reference-accessdate">. Retrieved <span class="nowrap">28 July</span> 2022</span> – via nsarchive2.gwu.edu.</cite></span>
</li>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
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