Portuguese 6925 kHz LSB 6.925 MHz LSB likely fishing fleets or boats within one fleet talking to each other
Since there were at least two different stations on 6925 kHz for a little while, in addition to the stronger AM "daytime pirate" that was on 6925 AM from 1500 UTC to 2200 UTC, its hard to say how long these guys have been on frequency. There's now another, different station on 6925.7 kHz AM but I am hearing Portuguese chatter, sometimes quite strong, on 6925 kHz LSB