{"id":27727223,"date":"2026-10-12T11:06:29","date_gmt":"2026-10-12T09:06:29","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/?p=27727223"},"modified":"2026-10-12T11:06:51","modified_gmt":"2026-10-12T09:06:51","slug":"aria-ec-135n-apollo-range-instrumentation-aircraft-apollo-11","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/aria-ec-135n-apollo-range-instrumentation-aircraft-apollo-11\/","title":{"rendered":"ARIA: The Flying Radio Stations That Talked to Apollo 11"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n<!-- mfsh:top -->\n\n<style>\n.mfsh-trigger{display:inline-flex;align-items:center;gap:10px;height:44px;padding:0 18px;margin:0 0 26px;border:2px solid #0F1720;background:#fff;color:#0F1720;font-family:inherit;font-size:14px;font-weight:700;line-height:1;letter-spacing:0;text-transform:none;cursor:pointer;box-shadow:none;transition:background .15s,color 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Houston was still talking to the crew, through a modified Air Force jet flying somewhere below. Its call sign was ARIA 3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A post on Instagram tells the story of these Apollo Range Instrumentation Aircraft well. Two details need correcting: who answered the radio check, and which aircraft is in the museum.<\/p>\n\n\n\n<div style=\"background:#f5f5f5;border-left:4px solid #1a1a1a;padding:18px 22px;margin:24px 0\"><p style=\"margin:0 0 8px;font-weight:600\">Quick Facts<\/p><ul style=\"margin:0;padding-left:20px\"><li><strong>Name:<\/strong> Apollo Range Instrumentation Aircraft (ARIA), later Advanced Range Instrumentation Aircraft<\/li><li><strong>Aircraft:<\/strong> Boeing EC-135N, converted from C-135A transports<\/li><li><strong>Fleet:<\/strong> 8 aircraft, modified 1966 by McDonnell Douglas and Bendix<\/li><li><strong>Operational:<\/strong> 1 January 1968<\/li><li><strong>Antenna:<\/strong> Steerable 7 ft dish in a 10 ft &ldquo;Droop Snoot&rdquo; radome<\/li><li><strong>Operator:<\/strong> US Air Force (Eastern Test Range, Patrick AFB, at the time of Apollo 11)<\/li><li><strong>Apollo 11 role:<\/strong> Voice relay and telemetry recording over the Pacific before TLI<\/li><\/ul><\/div>\n\n\n<h2 style=\"padding-top:22px\">Why Apollo Needed Flying Antennas<\/h2>\n\n\n<p class=\"wp-block-paragraph\">After reaching Earth orbit, Apollo crews had to restart the Saturn V&rsquo;s third stage for trans-lunar injection, the burn that sent them to the Moon. Where that burn happened depended on launch time and on which orbit the crew used, and it often fell over the Pacific between ground stations. Tracking ships could be placed in advance but could not move quickly. Aircraft could. NASA and the Defense Department had eight C-135 transports converted, initially planning for twelve but settling on six on station plus two spares.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/10\/ec-135n-apollo-range-instrumentation-aircraft-cutaway-1967-1024x760.jpg\" alt=\"NASA 1967 cutaway drawing of the EC-135N Apollo Range Instrumentation Aircraft\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">NASA&rsquo;s 1967 cutaway of the EC-135N, showing the steerable dish in the nose and the equipment racks behind it. Image: NASA 67-H-1237, public domain<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The most obvious change was the nose: a bulbous radome about ten feet long, nicknamed &ldquo;Droop Snoot&rdquo; or &ldquo;Snoopy Nose&rdquo;, housing a seven-foot steerable dish that tracked the spacecraft&rsquo;s signal. Behind it, operators, receivers and tape recorders filled the cabin. The aircraft relayed voice between the astronauts and Houston and recorded telemetry on magnetic tape for later analysis.<\/p>\n\n\n\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/BeBkZzCM8Go\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\n\n\n<h2 style=\"padding-top:22px\">&ldquo;Much Clearer&rdquo;: The Apollo 11 Radio Check<\/h2>\n\n\n<p class=\"wp-block-paragraph\">According to NASA&rsquo;s commentary, Apollo 11&rsquo;s trans-lunar injection burn would take place near the Gilbert Islands, roughly halfway between Australia and Hawaii, in the gap between the Carnarvon station in Western Australia and the tracking ship Redstone. Several ARIAs covered it. The first contact through ARIA 4 was scratchy, with static. Then capcom Bruce McCandless tried again.<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #5C91FF;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;Apollo 11, this is Houston through ARIA 3. Radio check. Over.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Bruce McCandless<\/strong> &mdash; capsule communicator, 2 hours 37 minutes into the mission<\/div><\/div><\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #5C91FF;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;Roger, Houston, Apollo 11. You are much clearer and adequately loud.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Apollo 11 crew<\/strong> &mdash; reply via ARIA 3, a few minutes before TLI<\/div><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A moment later the crew added that this was a lot better than the static they had had before. The caption says it was Neil Armstrong who answered. The original 1969 NASA transcript does mark the reply as the commander, but the Apollo Flight Journal, which re-checked the audio, attributes it to Buzz Aldrin. The safe version is simply that the crew answered.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/10\/boeing-ec-135n-61-0328-mcclellan-1979.jpg\" alt=\"Boeing EC-135N ARIA 61-0328 at McClellan AFB in 1979\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">EC-135N 61-0328 at McClellan AFB in 1979, by then serving with the 4950th Test Wing. Photo: Peter B. Lewis via San Diego Air &amp; Space Museum, no known restrictions<\/figcaption><\/figure>\n\n\n<h2 style=\"padding-top:22px\">After Apollo<\/h2>\n\n\n<p class=\"wp-block-paragraph\">The ARIAs flew their first mission on Apollo 4 in November 1967 and became operational on 1 January 1968. When Apollo ended in 1972 they were renamed Advanced Range Instrumentation Aircraft and went on supporting missile and space tests, moving to the 4950th Test Wing at Wright-Patterson in 1975 and later to Edwards. Re-engined examples became EC-135Es, and ex-airline Boeing 707s converted as EC-18Bs joined the fleet in the 1980s. The last EC-135E retired in 2000 and the programme ended in 2001.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The aircraft in the National Museum of the US Air Force in Dayton is EC-135E 60-0374, one of the original Apollo ARIAs, which flew to the museum on 3 November 2000. The caption&rsquo;s photo credit points to the museum aircraft correctly, but some online sources confuse it with 60-0375, which was scrapped in 2013.<\/p>\n\n\n\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/gAyYrkmrSH0\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\n\n\n\n<blockquote class=\"instagram-media\" data-instgrm-permalink=\"https:\/\/www.instagram.com\/p\/DeYEjQNyA0O\/\" data-instgrm-version=\"14\" style=\"background:#fff;border:0;margin:24px auto;max-width:540px;min-width:280px;width:100%\"><a href=\"https:\/\/www.instagram.com\/p\/DeYEjQNyA0O\/\">View this post on Instagram<\/a><\/blockquote><script async src=\"https:\/\/www.instagram.com\/embed.js\"><\/script><p class=\"wp-block-paragraph\"><em>Sources: Apollo Flight Journal (Apollo 11, Earth orbit and TLI); Spacelog Apollo 11 technical air-to-ground transcript; National Museum of the US Air Force fact sheet, Boeing EC-135E ARIA; Cape Canaveral Space Force Museum; Museum of Aviation, Robins AFB; flyaria.com aircraft histories; Anderson, &ldquo;NASA&rsquo;s Apollo Airborne Fire Brigade&rdquo; (2022); The Aviationist (2020)<\/em><\/p>\n\n<!-- mfsh:bottom -->\n\n<button type=\"button\" class=\"mfsh-trigger mfsh-bottom\" data-mfsh-placement=\"bottom\" aria-haspopup=\"dialog\"><svg><use href=\"#mfsh-i-share\"\/><\/svg>Share this story<\/button>\n\n<!-- \/mfsh:bottom -->\n\n\n<style>.mfq{margin:34px 0 8px}.mfq h2{font:26px\/1.3 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117;padding-top:22px;margin:0 0 6px}.mfq .qa details{border-top:1px solid #5C91FF;margin:0;padding:0}.mfq .qa details:last-of-type{border-bottom:1px solid #e2e7ee}.mfq .qa summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;font:18px\/1.7 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117}.mfq .qa summary::-webkit-details-marker{display:none}.mfq .qa summary::after{content:\"+\";font:24px Helvetica,sans-serif;color:#3568e0;flex:0 0 auto}.mfq .qa details[open] summary::after{content:\"\\2013\"}.mfq .qa details:hover summary{color:#3568e0}.mfq .qa .a{font:16px\/1.7 \"Gilroy regular\",Helvetica,Arial,sans-serif;color:#454e5e;padding:0 26px 24px}.mfq .qa .a a{color:#3568e0}@media(max-width:680px){.mfq .qa summary{padding:18px 14px;font-size:17px}.mfq .qa .a{padding:0 14px 20px}}<\/style>\n\n\n\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What was the Apollo Range Instrumentation Aircraft?<\/summary><div class=\"a\">The Apollo Range Instrumentation Aircraft (ARIA) were eight Boeing EC-135N jets fitted with a steerable 7 ft antenna in a large nose radome. Flown by the US Air Force, they relayed astronauts&rsquo; voices to Houston and recorded telemetry when Apollo spacecraft were out of range of ground stations, especially during trans-lunar injection.<\/div><\/details><details><summary>Did ARIA aircraft support Apollo 11?<\/summary><div class=\"a\">Yes. Several ARIA aircraft covered Apollo 11&rsquo;s trans-lunar injection burn over the Pacific between Australia and Hawaii on 16 July 1969. About seven minutes before the burn, the crew reported that Houston was much clearer through ARIA 3.<\/div><\/details><details><summary>Who answered Houston through ARIA 3 on Apollo 11?<\/summary><div class=\"a\">The original 1969 NASA transcript marks the reply as from commander Neil Armstrong, but the Apollo Flight Journal, which re-checked the audio, attributes it to Buzz Aldrin. The reply was: &ldquo;Roger, Houston, Apollo 11. You are much clearer and adequately loud.&rdquo;<\/div><\/details><details><summary>How many ARIA EC-135N aircraft were there?<\/summary><div class=\"a\">Eight C-135 transports were converted to EC-135N ARIA configuration in 1966, with six intended to be on station and two spares. They became operational on 1 January 1968.<\/div><\/details><details><summary>Where can you see an ARIA aircraft today?<\/summary><div class=\"a\">EC-135E 60-0374, one of the original Apollo ARIA aircraft, is displayed at the National Museum of the US Air Force in Dayton, Ohio. It flew to the museum on 3 November 2000.<\/div><\/details><\/div><\/section>\n\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the Apollo Range Instrumentation Aircraft?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Apollo Range Instrumentation Aircraft (ARIA) were eight Boeing EC-135N jets fitted with a steerable 7 ft antenna in a large nose radome. Flown by the US Air Force, they relayed astronauts\u2019 voices to Houston and recorded telemetry when Apollo spacecraft were out of range of ground stations, especially during trans-lunar injection.\"}},{\"@type\":\"Question\",\"name\":\"Did ARIA aircraft support Apollo 11?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Several ARIA aircraft covered Apollo 11\u2019s trans-lunar injection burn over the Pacific between Australia and Hawaii on 16 July 1969. About seven minutes before the burn, the crew reported that Houston was much clearer through ARIA 3.\"}},{\"@type\":\"Question\",\"name\":\"Who answered Houston through ARIA 3 on Apollo 11?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The original 1969 NASA transcript marks the reply as from commander Neil Armstrong, but the Apollo Flight Journal, which re-checked the audio, attributes it to Buzz Aldrin. The reply was: \\\"Roger, Houston, Apollo 11. You are much clearer and adequately loud.\\\"\"}},{\"@type\":\"Question\",\"name\":\"How many ARIA EC-135N aircraft were there?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Eight C-135 transports were converted to EC-135N ARIA configuration in 1966, with six intended to be on station and two spares. They became operational on 1 January 1968.\"}},{\"@type\":\"Question\",\"name\":\"Where can you see an ARIA aircraft today?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"EC-135E 60-0374, one of the original Apollo ARIA aircraft, is displayed at the National Museum of the US Air Force in Dayton, Ohio. It flew to the museum on 3 November 2000.\"}}]}<\/script><div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px\">\n<p style=\"margin:0 0 8px;font-weight:600;color:#333\">Related Posts<\/p>\n<p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/e-4b-nightwatch-doomsday-plane-naoc-explained\/\">E-4B Nightwatch: Inside America&#8217;s Doomsday Plane<\/a><\/p>\n<p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/area-51s-secret-737-shows-up-at-nasa\/\">Area 51&#8217;s Secret 737 Shows Up at NASA<\/a><\/p>\n<\/div>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Minutes before Apollo 11 fired its engine for the Moon, Houston was talking to the crew through an Air Force jet over the Pacific. The story of ARIA, the EC-135N with the giant nose, and the radio check the viral version gets slightly wrong.<\/p>\n","protected":false},"author":24,"featured_media":27726971,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[665],"tags":[],"class_list":["post-27727223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation-world"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ARIA EC-135N: The Jets That Talked to Apollo 11 | MiGFlug<\/title>\n<meta name=\"description\" content=\"Eight EC-135N \u2018Droop Snoot\u2019 jets relayed Apollo crews\u2019 voices when no ground station could. 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