Carl Robert Disch (presumed dead on May 14, 1965) was an ionospheric physicist for the National Bureau of Standards who went missing near Byrd Station, Antarctica, on May 8, 1965.
On the morning of May 8, 1965, he left the radio noise building to return to the main station complex located 2.1 km away.
His trail was spotted but the search party had to go back to the station for refueling.
Despite exhaustive searches and measures taken to make the station more visible, including firing of flares and illuminating extra floodlights, Disch was never found.
The author of the message, claiming to be Disch, stated that he was alive.