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Showing posts with label KW-46. Show all posts
Showing posts with label KW-46. Show all posts
12 June 2026

Simulating ADF ISB Transmissions: 12-Bit Repetition Coding on the USB Channel

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The idea for this post stems from an interesting RAN (Royal Australian Navy) fleet broadcast originating from the MHFCS (Modernised High Fre...
28 May 2025

Norwegian Navy STANAG 4481-PSK Serial Tone Mode

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STANAG 4481 defines the minimum technical standards for Naval shore-to-ship broadcast HF communication. The standard describes three data mo...
20 February 2024

KW-46 secured fleet broadcast over S-4285 in ISB mode (Humpty Doo, MHFCS)

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Interesting fleet broadcast from the MHFCS (Modernised High Frequency Communications System) site in Humpty Doo, Northern Territory - Austra...
5 January 2022

Yet another 75Bd (actual 50)/850 FSK

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Yet another 75Bd (actual 50)/850 FSK bearing KW-46 encrypted broadcast spotted on 5189.50 KHz CF, this time probably(?!) sourced from some F...
6 September 2021

75(50)Bd 4481F: yet another channel

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Yet another 75Bd/50Bd 4481F channel spotted on 9338.0 KHz (cf), most likely from NPM Lualualei, HI (thanks my friend Mike "mco"). ...
8 May 2021

yet another STANAG-4481F 50-75Bd broadcast

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5716.0 KHz (cf): STANAG-4481F (apparently) 75Bd fleet broadcast from NAU Isabela (PTR), running with the "odd" and already observe...
24 October 2020

two new 50Bd/850 FSK broadcast channels

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It seems that the Turkish friends (or "stars and stripes" friends in Turkey) have activated two new 50Bd/850 FSK broadcast channel...
21 October 2020

KW-46 secured traffic over 188-110A, MHFCS Townsville

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Long 110A Serial transmission heard on 6345.50 KHz/usb and used for KW-46/KIV-7 secured fleet broadcast, task usually performed by S4285/S-4...
2 comments:
22 August 2020

Swedish Navy submarine MSK multi-channel broadcast

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(For background it might be helpful to read the relevant entries here ) Swedish Royal Navy (Swedish: Svenska marinen [1]) uses a broa...
1 comment:
4 July 2020

STANAG-4481F from NSY, back to normal op

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(for background read all the post of this topic )  After a period during which the signals showed a strange behavior consisting of a 3-bi...
16 May 2020

yet another odd STANAG-4481F channel

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(for background read all the post of this topic )    May 16th update Interesting tip from my friend  cryptomaster (thanks)  who pointed...