Radiotelephone
COMMUNICATIONS SYSTEM FOR TRANSMISSION OF SPEECH OVER RADIO
Marine and mobile radio telephony; Radio telephone; Radiophone; Radiotelephony; Radio telephony; Marine SSB; Ship communication; Ship to shore telephone; Telephone (ship to shore); Ship to shore telephone calls; Marine & mobile radio telephony; Ship-to-shore; Radio-phone; Radio phone; Radiophony; Ship-to-ship; Shore-to-ship
A radiotelephone (or radiophone), abbreviated RT, is a radio communication system for transmission of speech over radio. Radiotelephony means transmission of sound (audio) by radio, in contrast to radiotelegraphy, which is transmission of telegraph signals, or television, transmission of moving pictures and sound.