Possible fishing fleets fishery radios South American fishermen on the HF radio - 12018 kHz 12.018 MHz USB mode.
Hearing weak Spanish language two-way chatter inside the 25 meter shortwave broadcast band - in between a powerful FSK signal on 12014 kHz, a powerful SWBC carrier on 12025 kHz and a powerhouse broadcast station on 12030 kHz.
QSO still on-going at 1606 UTC, informal chatter, heard one of the ops yawn over the air at 1607 UTC, followed by some more remarks in Spanish and some hysterical laughter...