Every RTTY and PSK31 signal in the sub-band, decoded at once by the station's software skimmer — RTTY 45.45 baud / 170 Hz shift, PSK31 BPSK 31.25 baud. Gold = callsigns, green = CQ; the pair line shows who is working whom.
Off air — the HF receiver is busy elsewhere (web SDR, FT8, sniffer…)
Listening — signals appear as the skimmer finds them