{"id":27462,"date":"2017-08-08T06:52:23","date_gmt":"2017-08-08T10:52:23","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=27462"},"modified":"2017-08-08T06:52:23","modified_gmt":"2017-08-08T10:52:23","slug":"guam-to-california-ctf-75-successfully-tests-hf-communications-system","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/08\/guam-to-california-ctf-75-successfully-tests-hf-communications-system\/","title":{"rendered":"Guam to California: CTF 75 successfully tests HF communications system"},"content":{"rendered":"
\"\"<\/a>

Electronics Technician 2nd Class Anthony Juarez and Electronics Technician 3rd Class Codie Flanagan, assigned to Naval Mobile Construction Battalion (NMCB)1, adjust frequency codes on a GRC-234 high-frequency base station at Naval Base Guam July 27, 2017. (Source: DVIDS)<\/p><\/div>\n

(Source: Defense Video Imagery Distribution System<\/a>)<\/p>\n

NAVAL BASE GUAM , GUAM
\n08.04.2017
\nStory by Petty Officer 1st Class Torrey Lee
\nCommander, Task Force 75
\nSubscribe 5<\/p>\n

Commander, Task Force (CTF) 75 successfully completed communications systems tests using high-frequency (HF) radio waves to broadcast voice and data 6,050 miles from Naval Base Guam to Port Hueneme, California, July 27, 2017.<\/p>\n

The assessment tested the capabilities of expeditionary forces to use HF waves to deliver data over the Pacific. HF has become a viable alternative for military forces when more common forms of communication, such as satellites, are unavailable.<\/p>\n

\u201cIn this particular back-up plan, we tested our ability to talk, and we were able to send text to one of our units that is across the Pacific Ocean,\u201d said Lt. Cmdr. Timothy Carmon, a communications planner temporarily assigned to CTF-75. \u201cThe transmissions and receptions are not as fast as IP services, however we were still able to communicate in a timely manner with the distant end.\u201d<\/p>\n

Utilizing the assets of CTF-75\u2019s Naval Mobile Construction Battalion (NMCB) 1, the command configured its antennae to broadcast to California. Once a successful voice transmission was received, communication directors at Navy Expeditionary Combat Command Pacific requested that CTF-75 try to send a data file.<\/p>\n

\u201cThese data files allow us to save time,\u201d said Electronics Technician 2nd Class Anthony Juarez, a communications supervisor assigned to NMCB 1. \u201cWe can send general diagrams, fire plans and points of interest. Instead of trying to verbally describe something, they [the recipient] have a graphic or a picture that gives them a better idea of the situation.\u201d<\/p>\n

Common communication devices used by the U.S. military incorporate satellites. CTF-75 has been testing HF systems in the case of satellite communication failure. HF is a frequency wave broadcast that is transmitted around the curvature of the Earth. Unlike other forms of frequencies, such as very-high frequencies and ultra-high frequencies, the transmission is not distorted by terrain or physical obstructions.<\/p>\n

\u201cWe may not always have access to operational equipment or the latest assets, but as communicators we should have a backup plan that is ready to be executed,\u201d said Carmon.<\/p>\n

Guam is located in the western region of the Pacific. Having an HF range of 6,000 miles is equivalent to broadcasting from Japan to the U.S., or oppositely, from Japan to the middle of Africa. During this most recent test, CTF-75 was also able to establish communications with Mobile Diving and Salvage Unit 1 in Hawaii.<\/p>\n

\u201cWe can hop our communications from island to island,\u201d said Juarez. \u201cThis test gave us the opportunity to know we can push our system to the absolute max from Guam. There are definitely different systems out there, but our system is really efficient at long-range HF. As new radios are incorporated in the Navy expeditionary community, I have no doubt it will get faster, more reliable and easier to set up.\u201d<\/p>\n

CTF-75 is currently testing its communication abilities with subordinate commands which include Seabee units, riverine squadrons, cargo handlers, explosive ordnance disposal technicians, and expeditionary intelligence forces.<\/p>\n

\u201cThis achievement was an important step in an effort to increase our capabilities to be prepared to execute missions in austere locations around the globe,\u201d said Carmon. \u201cOur expeditionary commanders may never need to communicate over a few thousand kilometers, but if the need arises our communicators will be able to provide the connection for that commander.\u201d<\/p>\n

CTF-75 is the primary expeditionary task force responsible for the planning and execution of coastal riverine operations, explosive ordnance disposal, diving engineering and underwater construction in the U.S. 7th fleet area of operations.<\/p>\n

Read the full article at the DVIDS hub…<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

(Source: Defense Video Imagery Distribution System) NAVAL BASE GUAM , GUAM 08.04.2017 Story by Petty Officer 1st Class Torrey Lee Commander, Task Force 75 Subscribe 5 Commander, Task Force (CTF) 75 successfully completed communications systems tests using high-frequency (HF) radio waves to broadcast voice and data 6,050 miles from Naval Base Guam to Port Hueneme, […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","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":[8,3,43],"tags":[6400,3628,3735,1401,4655],"class_list":["post-27462","post","type-post","status-publish","format-standard","hentry","category-articles","category-news","category-shortwave-radio","tag-dvids","tag-military","tag-military-communications","tag-military-radio","tag-why-shortwave"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-78W","jetpack-related-posts":[{"id":31986,"url":"https:\/\/swling.com\/blog\/2018\/05\/first-brigade-combat-team-legacy-hf-comms-provide-unlimited-range-with-zero-cost-or-resources\/","url_meta":{"origin":27462,"position":0},"title":"First Brigade Combat Team: Legacy HF comms provide “unlimited range with zero cost or resources”","author":"Thomas","date":"May 11, 2018","format":false,"excerpt":"(Source: DVIDS via Kim Elliott) Going the Distance! 1BTC Uses HF Radio to Go Far and Wide FORT DRUM, NY, UNITED STATES 05.03.2018 Story by Capt. Ed Robles 1st Brigade Combat Team,10th Mountain Division (LI) FORT DRUM, New York (May 3, 2018)--Captain Luke Reese, commander of C Company, 7th Brigade\u2026","rel":"","context":"In "Ham Radio"","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Millitary-HF-e1526038908620.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Millitary-HF-e1526038908620.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Millitary-HF-e1526038908620.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Millitary-HF-e1526038908620.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":52117,"url":"https:\/\/swling.com\/blog\/2022\/03\/guest-post-keeping-an-ear-on-the-us-coast-guard\/","url_meta":{"origin":27462,"position":1},"title":"Guest Post: Keeping an ear on the US Coast Guard","author":"Thomas","date":"March 9, 2022","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor,\u00a0Jock Elliott, who shares the following guest post: Keeping an ear on the US Coast Guard By Jock Elliott KB2GOM Wandering the vast expanses of YouTube, I encountered an episode of \u201cCoast Guard Alaska\u201d on DangerTV\u2019s Protecting Our Waters\/Coast Guard Rescue Series playlist.\u00a0One episode led to another,\u2026","rel":"","context":"In "Guest Posts"","block_context":{"text":"Guest Posts","link":"https:\/\/swling.com\/blog\/category\/guest-posts\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Mellon717_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Mellon717_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Mellon717_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":63154,"url":"https:\/\/swling.com\/blog\/2025\/06\/ktwr-guam-dan-suggests-you-log-a-piece-of-radio-history-today\/","url_meta":{"origin":27462,"position":2},"title":"KTWR Guam: Dan suggests you log a piece of radio history…today!","author":"Thomas","date":"June 15, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor Dan Greenall, who writes: Hi Thomas Regarding your recent post on June 5: https:\/\/swling.com\/blog\/2025\/06\/twr-guam-to-end-broadcasting\/ KTWR, Trans World Radio has recently announced they will be ending their shortwave broadcasts from Agana, Guam by October 31, 2025. However, unlike some stations that have vanished somewhat abruptly,\u2026","rel":"","context":"In "International Broadcasting"","block_context":{"text":"International Broadcasting","link":"https:\/\/swling.com\/blog\/category\/international-broadcasting\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/ktwr-shortwave-antennas.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":63067,"url":"https:\/\/swling.com\/blog\/2025\/06\/twr-guam-to-end-broadcasting\/","url_meta":{"origin":27462,"position":3},"title":"TWR Guam To End Broadcasting","author":"Thomas","date":"June 5, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor Tracy Wood, who write: This is sad but expected news. Guam is seeing a lot of land acquisition pressure due to greater military and commercial activity on the island. https:\/\/twr.org\/story\/transition-for-twrs-guam-station","rel":"","context":"In "International Broadcasting"","block_context":{"text":"International Broadcasting","link":"https:\/\/swling.com\/blog\/category\/international-broadcasting\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/Guam-Transition-Article-Banner.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/Guam-Transition-Article-Banner.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/Guam-Transition-Article-Banner.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/Guam-Transition-Article-Banner.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/Guam-Transition-Article-Banner.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":19626,"url":"https:\/\/swling.com\/blog\/2016\/06\/bbg-take-note-shortwave-radio-distributes-smartphone-apps\/","url_meta":{"origin":27462,"position":4},"title":"BBG, take note: Shortwave radio distributes smartphone apps","author":"Thomas","date":"June 22, 2016","format":false,"excerpt":"Many thanks to Andy Sennitt, who posted a link to this Mission Networks News article on Facebook. 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