[MRCA] MIL-STD-188-110 Serial - Signal Identification Wiki

[Gene Smar]

Al et al:
The HF digital standard you're thinking of is https://www.sigidwiki.com/wiki/MIL-STD-188-110_Serial . Army MARS has been using this on their nets for years. It supports encryption which  is used extensively. I believe there is a Ham version, too. I'll have to dig through my archived emails to find a link.
73 deGene Smar AD3F 

Sent from my Radio Shack TRS-80 model 100 laptop
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