{"id":3912,"date":"2026-07-07T09:32:46","date_gmt":"2026-07-07T08:32:46","guid":{"rendered":"https:\/\/viariumgroup.com\/?p=3912"},"modified":"2026-07-07T16:57:58","modified_gmt":"2026-07-07T15:57:58","slug":"que-es-ils","status":"publish","type":"post","link":"https:\/\/viariumgroup.com\/en\/blog\/que-es-ils\/","title":{"rendered":"The invisible system that allows planes to land when the runway disappears in the fog"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>The recent upgrade of the ILS system at Santiago-Rosal\u00eda de Castro Airport shines a spotlight on one of the most critical yet least visible pieces of air navigation infrastructure.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When an airport is operating in fog, heavy rain, or conditions of reduced visibility, the safety of each landing depends on much more than just the pilots' skill.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Behind these operations lies a technological infrastructure capable of guiding aircraft through the most critical phases of flight and maintaining the airport's operational capacity even when visual references are virtually nonexistent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is the Instrument Landing System (ILS), one of the systems for<a href=\"https:\/\/viariumgroup.com\/en\/blog\/como-funciona-el-sistema-de-navegacion-aerea\/\" target=\"_blank\" rel=\"noreferrer noopener\"> air navigation<\/a> one of the most important aspects of modern aviation and an essential piece of infrastructure for ensuring safe landings in adverse weather conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The importance of these systems was recently highlighted by the upgrade of the ILS at Santiago-Rosal\u00eda de Castro Airport, a project carried out simultaneously with improvements to the airfield and which represented one of the greatest challenges in airport coordination undertaken at the facility in recent years.<\/p>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What exactly is an ILS system?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Although it goes completely unnoticed by most passengers, the ILS is not a single device or a simple antenna installed next to the runway. It is a system of antennas, radio transmitters, and electronic equipment strategically distributed throughout the airport area that transmit precise signals to aircraft during approach and landing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to these markers, pilots receive constant information about their position relative to the runway centerline and the correct descent path, enabling safe approaches even when visibility is very limited. Their proper placement, calibration, and maintenance are essential to ensuring that the information received by the aircraft is accurate and reliable.<\/p>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-1024x576.jpg\" alt=\"\" class=\"wp-image-3942\" srcset=\"https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-1024x576.jpg 1024w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-300x169.jpg 300w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-768x432.jpg 768w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-1536x864.jpg 1536w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2-18x10.jpg 18w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/Copia-de-Pista-santiago-rosalia-2.jpg 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Much more than just a landing aid<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The importance of ILS goes far beyond simply facilitating an approach.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its availability directly affects an airport's operational capacity and its ability to maintain continuity of operations when weather conditions deteriorate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cWithout a reliable ILS, an airport\u2019s operational capacity would be seriously compromised when visibility is reduced due to weather conditions,\u201d emphasizes Juan Ignacio Gal\u00e1n, an air navigation technician at<a href=\"https:\/\/viariumgroup.com\/en\/\" target=\"_blank\" rel=\"noreferrer noopener\"> Viarium<\/a>.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For this reason, the renovation or replacement of these systems is considered a strategic initiative within any airport infrastructure.<\/p>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Challenge of Working Next to an Operational Runway<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike other airport infrastructure, ILS systems are located in particularly sensitive areas of the airfield, very close to the runway and aircraft movement areas.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This circumstance makes any action taken on the system a major technical and operational challenge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u201cThe complexity of replacing an ILS isn\u2019t just about the technology. The real challenge is doing it so close to the runway while causing as little disruption as possible to the airport\u2019s daily operations\u201d, <\/em>adds Juan Ignacio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to specialized engineering work, this type of project requires coordination among aviation agencies, airport operators, contractors, and those responsible for<a href=\"https:\/\/viariumgroup.com\/en\/blog\/que-es-seguridad-operacional-aeropuertos\/\" target=\"_blank\" rel=\"noreferrer noopener\"> operational safety<\/a> and highly specialized technical teams.<\/p>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/WhatsApp-Image-2026-05-29-at-09.30.47-1-768x1024.jpeg\" alt=\"\" class=\"wp-image-3943\" srcset=\"https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/WhatsApp-Image-2026-05-29-at-09.30.47-1-768x1023.jpeg 768w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/WhatsApp-Image-2026-05-29-at-09.30.47-1-225x300.jpeg 225w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/WhatsApp-Image-2026-05-29-at-09.30.47-1-9x12.jpeg 9w, https:\/\/viariumgroup.com\/wp-content\/uploads\/2026\/07\/WhatsApp-Image-2026-05-29-at-09.30.47-1.jpeg 800w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The Case of Santiago Airport<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most recent examples of this complexity has been the upgrade of the ILS system at Santiago-Rosal\u00eda de Castro Airport.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The work was carried out simultaneously with the renovation and improvement of the airfield, as part of a project that required the temporary closure of the airport for 35 days to perform critical infrastructure work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The overlap of multiple strategic projects made it necessary to develop a particularly rigorous plan to ensure that the deadlines for the opening were met.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u201cCoordination among all the various activities was crucial. There were numerous critical tasks being carried out simultaneously, and meeting the deadlines was essential to ensure the infrastructure could be put into service\u201d, <\/em>Gal\u00e1n recalls this incident.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The presentation highlighted the importance of coordination among all stakeholders and the role that air navigation systems play in the overall operation of an airport.<\/p>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Essential infrastructure for air connectivity<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Although it remains invisible to most users, the ILS continues to be one of the most important pieces of infrastructure for ensuring the safety and reliability of airport operations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its ability to keep airports operational in conditions of low visibility makes it a strategic tool for air connectivity and for the smooth operation of the<a href=\"https:\/\/viariumgroup.com\/en\/mercados\/transporte\/\" target=\"_blank\" rel=\"noreferrer noopener\"> transport<\/a> modern aircraft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Behind every safe landing in adverse weather conditions lies a combination of technology, planning, coordination, and specialized engineering that allows operations to continue as normal.<\/p>","protected":false},"excerpt":{"rendered":"<p>La reciente renovaci\u00f3n del sistema ILS del Aeropuerto de Santiago-Rosal\u00eda de Castro pone el foco sobre una de las infraestructuras m\u00e1s cr\u00edticas y menos visibles de la navegaci\u00f3n a\u00e9rea. Cuando un aeropuerto opera con niebla, lluvia intensa o condiciones de visibilidad reducida, la seguridad de cada aterrizaje depende de mucho m\u00e1s que la habilidad de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3941,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-3912","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u00e9 es ILS, el sistema de aterrizaje por instrumentos - Viarium<\/title>\n<meta name=\"description\" content=\"Descubre qu\u00e9 es el sistema ILS (Sistema de Aterrizaje por Instrumentos), c\u00f3mo funciona el localizador y la senda de planeo, sus categor\u00edas y componentes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/viariumgroup.com\/en\/blog\/que-es-ils\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu\u00e9 es ILS, el sistema de aterrizaje por instrumentos - 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