Drifting station "North Pole-3" and "North Pole-4. Amateur Radio Upolu-3 'and' Upolu-4, bind to many radio amateurs. Radiomen K. Kurko and LN Razbash work for amateur communications. LN Razbash considering the card was sent from Prague Sedletskii radio operator, fills a response card for the Moscow Central Radio DOSAAF.