About ten years ago, when I was living in Seattle, I had a clock radio
with rather crap reception, so finding a station I was both
interested in and capable of listening to when I woke up was a bit of
a task. One day, though, as I began slowly and carefully tuning the
dial to try to find something worth listening to, I stumbled across
clear, strong, and repeating Morse code. It wasn't an SOS, which was
about the only Morse I knew, but it was a good strong signal, better
than the alarm clock's built in buzzer, so I shrugged mentally and
left the tuner there. As a result, the pattern got burnt into my
brain.

Some years later, I decided to look up what this dot and dash pattern
might mean, in hopes of determining what I'd been listening to. I'd
heard of CQ, so I thought it might turn out to be that, but no...

-... ..-.

That's 'BF', isn't it? Why would someone be sending 'BF BF BF' out on
a radio frequency? Or was my radio so crap as to be picking up
something else entirely? Please shed some light my way; I'm feeling
lost...