{"id":65068,"date":"2026-01-01T08:59:16","date_gmt":"2026-01-01T12:59:16","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=65068"},"modified":"2026-01-01T08:59:16","modified_gmt":"2026-01-01T12:59:16","slug":"a-mystery-station-from-vietnam","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2026\/01\/a-mystery-station-from-vietnam\/","title":{"rendered":"A Mystery Station from Vietnam"},"content":{"rendered":"

\"\"<\/a>By Don Moore<\/strong><\/p>\n

Don\u2019s traveling DX stories can be found in his book\u00a0Tales of a Vagabond DXer<\/a>\u00a0<\/i>[SWLing Post affiliate link]<\/i>.<\/i><\/b>\u00a0If you\u2019ve already read his book and enjoyed it, do Don a favor and leave a review on Amazon.<\/i><\/p>\n

Since early November, I\u2019ve been traveling and DXing in Southeast Asia. I\u2019ll write more about that in a few future articles, but I came across something new that I can\u2019t wait to share. It\u2019s unusual and possibly might meet the criteria to be considered an SWBC (shortwave broadcast) station. If you\u2019re in this part of the world, it shouldn\u2019t be too hard to log. In other places, it will be a serious DX target to try for.<\/p>\n

A few nights ago I was using the SDR-Console Data Analyzer tool<\/a> to look for voice air and maritime communications in some spectrum recordings I had made on 11 December in Pakbeng, Laos. On 8101 kHz USB, I came across a strong signal with a very polished program that wasn\u2019t anything at all like a utility broadcast. It started at 1217 UTC with a little music interlude, an announcement by a woman, a bit more music, then into some kind of documentary talk, all in an unknown language. My recording ended five minutes later, so I had no idea how long it went.<\/p>\n

A few years ago it would have remained a total mystery but technology has given us some very helpful tools. To identify the language I began playing it into Google Translate on my phone. The second try identified the language as Thai. Here\u2019s the English translation of the initial program announcement:<\/p>\n

Greetings to the people and viewers. I invited the people and the audience to listen to the Duyen Hai information program broadcast from Duyen Hai Vietnam Information System. Today’s program on December 11, 2025, at 19:05 has the following content.<\/strong><\/em><\/p>\n

I heard this at 1217 UTC, which would be 1917 in Southeast Asia. So the broadcast was delayed by twelve minutes. After a brief bit of music there was a talk about the fishing industry in Hai Long Bay in Vietnam. And the language was Thai, not Vietnamese.<\/p>\n

Here\u2019s the audio of my reception<\/a> in Pakbeng. Set Google Translate to translate from Thai to English and play it on your phone. It may take a couple of tries to get it to work.<\/p>\nhttps:\/\/swling.com\/blog\/wp-content\/uploads\/2026\/01\/VTN_8101_DuyenHaiInfoSys_11Dec2025_1217ALL.mp3<\/a><\/audio>\n

This really sounded to me like a regular broadcast program. I started looking through the other spectrum recordings I had on hand for ones with the same time and frequency range. I found the same broadcast starting at 1214 UTC on 20 November (heard in Taal, Philippines) and at 1215 UTC on 03 December (heard in Trang An, Vietnam). The programs followed the same pattern and ended about fifteen minutes later. One program was an interview and the other another documentary. The signals were not as strong or clear so it was difficult getting Google Translate to work with them but I was able to ascertain that the language was still Thai and that the topics were fisheries and economic development.<\/p>\n

I also have with me some spectrum recordings from an October DXpedition in Pennsylvania. I found the same program around 1215 UTC on 8101 kHz on those on 30 and 31 October. In Pennsylvania the signal was barely there but on peaks I could tell it was the same woman\u2019s voice. So this appears to be some kind of regular program and it\u2019s been going on for at least two months. But what is the Duyen Hai Information System and who is behind it?<\/p>\n

There is a Duyen Hai Power Station in the far south of Vietnam. But the most likely explanation would be a connection to Vu Duyen Hai, the Deputy Director of Fisheries and Fisheries Resources for the Vietnamese government. There are numerous articles about him on the Internet. He\u2019s been very involved in trying to make sure that Vietnam\u2019s fisheries industry is ethically managed according to international standards.<\/p>\n

So this appears to be some sort of regular broadcast in which the Vietnamese Fisheries department attempts to inform people in the Thai fishing industry as to what their Vietnamese counterparts are doing. To do that it would make sense to use an existing marine transmitter in the marine band since Thai fishing boats would have radios to receive this. But we don\u2019t know if this being done officially by Duyen Hai Information Systems or if someone else is unofficially relaying the station on the marine band.<\/p>\n

But you don\u2019t have to be a Thai fisherman to tune in. The station is making to the eastern US. In addition to my October loggings it was logged in Maryland yesterday. So wherever you are, check out 8101 kHz USB around 1215 UTC and see if you can hear this mystery station from Vietnam.<\/p>\n","protected":false},"excerpt":{"rendered":"

By Don Moore Don\u2019s traveling DX stories can be found in his book\u00a0Tales of a Vagabond DXer\u00a0[SWLing Post affiliate link].\u00a0If you\u2019ve already read his book and enjoyed it, do Don a favor and leave a review on Amazon. Since early November, I\u2019ve been traveling and DXing in Southeast Asia. I\u2019ll write more about that in […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3],"tags":[1810,5448],"class_list":["post-65068","post","type-post","status-publish","format-standard","hentry","category-news","tag-don-moore","tag-mystery-signals"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-gVu","jetpack-related-posts":[{"id":65151,"url":"https:\/\/swling.com\/blog\/2026\/01\/mystery-station-solved\/","url_meta":{"origin":65068,"position":0},"title":"Mystery Station \u2026 Solved","author":"Thomas","date":"January 11, 2026","format":false,"excerpt":"By Don Moore Don\u2019s traveling DX stories can be found in his book\u00a0Tales of a Vagabond DXer\u00a0[SWLing Post affiliate link].\u00a0If you\u2019ve already read his book and enjoyed it, do Don a favor and leave a review on Amazon. About two weeks ago I reported a mystery station identifying as the\u2026","rel":"","context":"In "DX"","block_context":{"text":"DX","link":"https:\/\/swling.com\/blog\/category\/dx\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/01\/VishipelSites.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/01\/VishipelSites.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/01\/VishipelSites.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":58424,"url":"https:\/\/swling.com\/blog\/2023\/12\/announcing-don-moores-latest-book-tales-of-a-vagabond-dxer\/","url_meta":{"origin":65068,"position":1},"title":"Announcing Don Moore’s latest book: Tales of a Vagabond DXer","author":"Thomas","date":"December 11, 2023","format":false,"excerpt":"Many thanks to SWLing Post contributor and friend Don Moore\u2013noted\u00a0author, traveler, and DXer\u2013for sharing the following announcement about his latest book! Don is a brilliant author--you'll enjoy accompanying him on his travels and radio journey in this latest book. I highly recommend all of his work! \u00a0 Tales of a\u2026","rel":"","context":"In "Books"","block_context":{"text":"Books","link":"https:\/\/swling.com\/blog\/category\/books\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/12\/VagabondDXerCover.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":64348,"url":"https:\/\/swling.com\/blog\/2025\/10\/taming-the-noise-don-moores-simple-cheap-filter-solution-for-traveling-dxers\/","url_meta":{"origin":65068,"position":2},"title":"Taming the Noise: Don Moore\u2019s Simple, Cheap Filter Solution for Traveling DXers","author":"Thomas","date":"October 24, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor\u00a0Don Moore\u2013noted\u00a0author, traveler, and DXer\u2013who shares the following post: A Cheap and Simple Noise Filter By Don Moore Don\u2019s traveling DX stories can be found in his book Tales of a Vagabond DXer [SWLing Post affiliate link]. If you\u2019ve already read his book and enjoyed\u2026","rel":"","context":"In "DX"","block_context":{"text":"DX","link":"https:\/\/swling.com\/blog\/category\/dx\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/10\/10_NoiseFilter_01a.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/10\/10_NoiseFilter_01a.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/10\/10_NoiseFilter_01a.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/10\/10_NoiseFilter_01a.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/10\/10_NoiseFilter_01a.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":62077,"url":"https:\/\/swling.com\/blog\/2025\/02\/don-moores-photo-album-guatemala-part-two-guatemala-city\/","url_meta":{"origin":65068,"position":3},"title":"Don Moore\u2019s Photo Album:\u00a0 Guatemala (Part Two) \u2013 Guatemala City","author":"Thomas","date":"February 16, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor\u00a0Don Moore\u2013noted\u00a0author, traveler, and DXer\u2013for the latest installment of his\u00a0Photo Album guest post series: Don Moore\u2019s Photo Album:\u00a0 Guatemala (Part Two) \u2013 Guatemala City by Don Moore More of Don\u2019s traveling DX stories can be found in his book\u00a0Tales of a Vagabond DXer\u00a0[SWLing Post affiliate\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/045_AluxNahual1983.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/045_AluxNahual1983.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/045_AluxNahual1983.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/045_AluxNahual1983.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/045_AluxNahual1983.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":63120,"url":"https:\/\/swling.com\/blog\/2025\/06\/new-sdr-recordings-from-peru-and-brazil-now-available-via-don-moore\/","url_meta":{"origin":65068,"position":4},"title":"New SDR Recordings from Peru and Brazil Now Available via Don Moore","author":"Thomas","date":"June 9, 2025","format":false,"excerpt":"Our good friend and longtime contributor Don Moore has just updated his extensive SDR recordings archive with new files from his recent travels in South America. These latest recordings\u2014captured in Peru (February) and southern Brazil (May)\u2014are now available to explore and download. Don writes: I have a webpage where most\u2026","rel":"","context":"In "DX"","block_context":{"text":"DX","link":"https:\/\/swling.com\/blog\/category\/dx\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Spectrum-Display-Airspy-SDR-Sharp.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Spectrum-Display-Airspy-SDR-Sharp.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Spectrum-Display-Airspy-SDR-Sharp.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Spectrum-Display-Airspy-SDR-Sharp.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":58025,"url":"https:\/\/swling.com\/blog\/2023\/10\/update-to-don-moores-marine-broadcast-list\/","url_meta":{"origin":65068,"position":5},"title":"Update to Don Moore’s Marine Broadcast List","author":"Thomas","date":"October 17, 2023","format":false,"excerpt":"Marine Broadcast List Updated By Don Moore I just updated my by-time listing of scheduled marine broadcasts in the MF 1600-3400 kHz range. This is primarily based on the by-location listings at the DX Info Centre website. Of special interest at the moment is Iqaluit Coast Guard Radio in Canada\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-Dial.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-Dial.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-Dial.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-Dial.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/JRC-Dial.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=65068"}],"version-history":[{"count":1,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65068\/revisions"}],"predecessor-version":[{"id":65071,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65068\/revisions\/65071"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=65068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=65068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=65068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}