The International Radiotelephony Spelling Alphabet or simply Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for ...

Abstract: A multiple-access modulation technique that uses multilevel frequency shift keying (FSK) to modulate frequency-hopped, spread-spectrum carriers is examined for possible application to ...

“In fact, it was communicated to us the ship might radio-in PAN-PAN. In that case Malta would have to intervene.” The radiotelephony message PAN-PAN is the international standard urgency signal that ...