(See Articles 30, 57)
1. When it is necessary to spell out call signs, service abbreviations and words, the following letter spelling table shall be used:
| Letter to be transmitted | Code word to be used | Spoken as * |
| A | Alfa | AL FAH |
| B | Bravo | BRAH VOH |
| C | Charlie | CHAR LEE or SHAR LEE |
| D | Delta | DELL TAH |
| E | Echo | ECK OH |
| F | Foxtrot | FOKS TROT |
| G | Golf | GOLF |
| H | Hotel | HOH TELL |
| I | India | IN DEE AH |
| J | Juliett | JEW LEE ETT |
| K | Kilo | KEY LOH |
| L | Lima | LEE MAH |
| M | Mike | MIKE |
| N | November | NO VEM BER |
| O | Oscar | OSS CAH |
| P | Papa | PAH PAH |
| Q | Quebec | KEH BECK |
| R | Romeo | ROW ME OH |
| S | Sierra | SEE AIR RAH |
| T | Tango | TANG GO |
| U | Uniform | YOU NEE FORM or OO NEE FORM |
| V | Victor | VIK TAH |
| W | Whiskey | WISS KEY |
| X | X-ray | ECKS RAY |
| Y | Yankee | YANG KEY |
| Z | Zulu | ZOO LOO |
* The syllables to be emphasized are underlined.
2. When it is necessary to spell out figures or marks, the following table shall be used:
| Letter to be transmitted | Code word to be used | Spoken as ** |
| 0 | Nadazero | NAH-DAH-ZAY-ROH |
| 1 | Unaone | OO-NAH-WUN |
| 2 | Bissotwo | BEES-SOH-TOO |
| 3 | Terrathree | TAY-RAH-TREE |
| 4 | Kartefour | KAR-TAY-FOWER |
| 5 | Pantafive | PAN-TAH-FIVE |
| 6 | Soxisix | SOK-SEE-SIX |
| 7 | Setteseven | SAY-TAY-SEVEN |
| 8 | Oktoeight | OK-TOH-AIT |
| 9 | Novenine | NO-VAY-NINER |
| Decimal point | Decimal | DAY-SEE-MAL |
| Full stop | Stop | STOP |
** Each syllable should be equally emphasized.
3. However, stations of the same country, when communicating between themselves, may use any other table recognized by their administration.