6630 kHz USB 6.630 MHz - 45 meter freebanders - Portuguese language. Lots and lots of other QSOs in the 6 MHz band today...this one popped out to me. Listening via the Westminster, MD KiwiSDR. Rapid-fire dialog in Portuguese, possibly fishing fleets or freebanders...this is a dangerous area to hang out in, as its in the 6 MHz civilian aircraft band...nevertheless, the 6.6 MHz region is very popular. I see several other QSOs in progress on the waterfall display as I type this.