The phonetic alphabet is used to spell out parts of a message or call sign that are critical or otherwise hard to recognize during voice communication.

The phonetic alphabet assigns code words to the letters of the English alphabet so that code words can be pronounced and understood by those who transmit and receive voice messages regardless of their native language.

The phonetic alphabet is a part of INTERCO (International Code of Signals).


Press on the play button before a letter to hear its pronounciation in the phonetic alphabet


Replace a word Spinaker with any text and push the button to hear its spelling in the phonetic alphabet

Before spelling out part of a message or call sign are used the words "I SPELL". For example, the message "this is S5L12" could be transmitted as "THIS IS S5L12, I SPELL Sierra Pantafive Lima Unaone Bissotwo".

Some parts of a message are almost always spelled:
  • Position (Latitude and Longitude), for example "Position 450 36' North 0130 32' East" is transmitted as "Position Kartefour Pantafive degrees Terrathree Soxisix minutes North, Nadazero Unaone Terrathree degrees Terrathree Bissotwo minutes East";
  • Position (Bearing and Distance to a point), for example “ Position 2400 from Koper Castle, 2 miles” is transmitted as “Position Bissotwo Kartefour Nadazero degrees from Koper Castle, Bissotwo miles;
  • Course, for example "My course is 0950" is transmitted as "My course is Nadazero Novenine Pantafive degrees";
  • Speed, for example “My speed is 14 knots” is transmitted as “ My speed is Unaone Kartefour knots";
  • Time, for example "at 0810" ( LT at 8:10 AM) is transmitted as "at Nadazero Oktoeight Unaone Nadazero Local Time".
Last modified: Saturday, 25 April 2020, 7:50 PM