Brian Gaff wrote:
Yes, in Europe, I've heard this sort of thing all the way up to 3.4Mhz.
Many are in French around 3.2Mhz.

The English speaking ones are just apparently people on all kind of ships
and boats and often their accents are northern England and lots of
swearing.

I doubt if its legal, but on the other hand, does it really do any harm
either?

I had to Google it because it seemed so obvious that 3824 was
in the 80 meter ham band. Anyway, here are the ranges for that band:

3500-3800 Region 1 (Europe,Africa,Middle East,northern Asia)
3500-4000 Region 2 (including USA)
3500-3900 Region 3 (Asia-Pacific)

So 3824 is 80 meter ham band in the Asia-Pacific region and in the
Western Hemisphere. But the Aleutian chain is quite possibly in a
grey zone and the seamen are likely aware of that.

Considered as ham radio activity this 3824 usage is illegal since
no calls are being used. And it is rather obvious that these folks
are unlicensed.

George