6300 kHz 6.3 MHz 6.300 MHz USB - they're there again, the unknown language chatter guys. Seems to be their home frequency. Several other 6 MHz marine band frequencies are active with SSB chatter in the usual Spanish, Portuguese and English languages.
UNID net, presumed marine or maritime mobile net 6300 kHz USB mode. Received via COMMSIGMA KiwiSDR. SIO 444 good signals