3 ms·
ZCZC appears to be a signaling codeword for this protocol: https://en.wikipedia.org/wiki/NAVTEX https://en.wikipedia.org/wiki/NAVTEX - "NAVTEX messages are tr
by perihelions 2y ago
ZCZC appears to be a signaling codeword for this protocol:
https://en.wikipedia.org/wiki/NAVTEX https://en.wikipedia.org/wiki/NAVTEX
- "NAVTEX messages are transmitted using binary frequency-shift keying (BFSK) at 100 bit/s and a 170 Hz frequency shift"
It's a low-bandwidth way to send weather tweets to seafaring boats.
- trebligdivad 2y agoI love your phrase 'weather tweets'
- starkparker 2y agoZCZC is the Start of Message signal for a few protocols, including NOAA's SAME, which seems relevant here as this is a NOAA broadcast. https://en.wikipedia.org/wiki/Specific_Area_Message_Encoding https://en.wikipedia.org/wiki/Specific_Area_Message_Encoding