Via K2SDR WebSDR. Tuning around the band, came across this at 0110 UTC. Seems to either be a 1 kHz modulated tone (tuning in USB mode on 6887.0 kHz) or a carrier sitting right on 6888.0 kHz unmodulated. Fading in and out. Was strongest at roughly S5-S6 but now (0113 UTC) it is hanging out just above the noise floor. Some weak pescadore QRM when tuning in USB. Flipped it over and tuned to 6889.0 kHz LSB and the QRM isn't as bad. Still hearing the same tone of course. Not sure how long this has been here but its there. Slow fades but even at weakest signal level its still stronger than the distant marine SSB traffic nearby this frequency.