SV1XV's photos with the keyword: 4Y1A

QSL card from the UN Vienna club (4U1VIC), using callsign 4Y1A for a CW QSO on 10.1 MHz. Radio prefix 4Y is assigned to the International Civil Aviation Organization (ICAO). For the history of ICAO "4Y" stations, refer to " Canadian Weather Ships " by Jerry Proc, VE3FAB.