That signal is actually pretty cool…

I think it’s JORN an OTHR, but it only sort of matches up.

Sometimes there was a preamble before it started, and then it would jump around frequencies a little.

They weren’t evenly spaced, the lowest I was around 6.9753 Mhz to the highest 6.9576Mhz (USB).

Around 10s between bursts too.

Don’t really know what is going on, but this is what I saved:

Recording of a single burst (USB).

Update 2021-06-27: The signal is likely from US Navy, not JORN.