"Me" wrote:

There are few 3 Mhz Marine Frequencies, (Mostly in alaskan waters)
and most non-commercial MF/HF Marine Radio Users rarely use any below
the Maritime Mobile 4 Mhz Band.

I don't claim to be any sort of expert, but on the radio course I took, we
learned that 2182 kHz is "the international distress, safety and calling
frequency for radiotelephony". As far as I can see that is well below 4MHz,
and commonly used even outside Alaska.

-Heikki