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4737.4 Warships?

Over the past year I have caught some interesting traffic on 4737.4 kHz USB. At first I didn’t pay much attention to this frequency, as the comms sounded quite casual in nature. It wasn’t until hearing them mention warships, then I started to take notice. In the clip below you will hear a station identified as “0301” calling “9701 Atlas” reporting they completed the AAV2 with Warship 69, and were now engaging with Warship 38.

I also logged this frequency last summer and heard phrases such as “Red Coast Guard” and “Red Territorial Waters”. The users refer to this as Tac 4 and also gave mention of VHF marine channels. Callsigns heard include: 0301, 0302, 9701 Atlas, Caw 1 and 120. Both times monitored was during daylight hours so probably coming from the offshore ranges in the Southern California area. If anyone knows who they could be please advise.

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13348 USB San Francisco ARINC phone patch w/ talk about ash from the Klyuchevskoy Volcano located on the Kamchatka Peninsula in Russia.


13339 kHz USB San Francisco ARINC w/ volcanic weather advisory.

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This morning I logged a Korean language numbers station on 6730 kHz in AM mode. Searching online it was found this is V24 and is believed to transmit from South Korea. Here is an audio clip of the transmission as heard from my location in Southern California.

More information about the V24 Korean numbers station can be found here.

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6837 Whale Sounds

Here is an oddity from last night. I have read about “feedback/whales” stations on various newsgroups, but this the first time I have picked one up.

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I monitored some odd sounding data bursts/scrambled voice on 8935 kHz in LSB mode this evening. Following the encoded message, a male voice could be heard reading letters phonetically. Hmmm…

Update 8/12/2010 – Better audio sample posted below. I have been informed these comms are possibly from a tuna fleet in the Pacific. I also monitored clear voice comms that further confirms this theory.

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For the past several days the US Navy has been working on 9031 USB w/ stations Golf Whiskey, Golf, Mike, Delta, Hotel, Echo, Lima and others. This is most like from the USS Abraham Lincoln Strike Group’s Composite Training Unit Exercise (COMPTUEX) taking place off southern California.

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Bangkok Meteorological Radio broadcasts Thailand maritime weather information on frequencies 6765.1 and 8743 kHz. This is one of the first stations I check for band openings in that part of the world. Below is a recording of their broadcast and interval signal on 8743 kHz.

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4712 Magadan ACC

Magadan Area Control Center works flights on polar routes, often handed over from Gander. Magadan Radio can normally be heard on 4712, 8837 and 11390 kHz during the overnight hours from the Western USA. Other published frequencies include: 6585, 13265 and 15030 kHz. Unfortunately the aircraft are just out of my reception range given the conditions, but the high powered transmitter from their control facilities are quite easy to pick up.

Here is a recording of Magadan Radio taken from my archive.

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The Boeing 787 returned to Seattle after it’s first international trip to the 2010 Farnborough International Airshow. I just happened to dial in Boeing Radio on 11306 kHz as BOE787 was flying over Canada on it’s way back home.

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More Russian aviation comms! This time we have Petropavlovsk ACC working on 2964 kHz. I accidentally ran across this one while seeking out North Korean SWL broadcasts in the 2 MHz band a few months ago. As you can hear from the audio clip, the controller came in quite clear and spoke English. The planes were too weak to copy, but it was surprising enough to catch anything on such a low frequency, so I can’t complain too much.

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