| 国際遭難信号 SOS (Save Our Souls!) ●●● −−− ●●● |
| 文字 | 通話表記 | モールス信号 | 文字 | 通話表記 | モールス信号 | |
| A | ALFA | ●− | N | NOVEMBER | −● | |
| B | BRAVO | −●●● | O | OSCAR | −−− | |
| C | CHARLIE | −●−● | P | PAPA | ●−−● | |
| D | DELTA | −●● | Q | QUEBEC | −−●− | |
| E | ECHO | ● | R | ROMEO | ●−● | |
| F | FOXTROT | ●●−● | S | SIERRA | ●●● | |
| G | GOLF | −−● | T | TANGO | − | |
| H | HOTEL | ●●●● | U | UNIFORM | ●●− | |
| I | INDIA | ●● | V | VICTOR | ●●●− | |
| J | JULIETT | ●−−− | W | WHISKEY | ●−− | |
| K | KILO | −●− | X | X−RAY | −●●− | |
| L | LIMA | ●−●● | Y | YANKEE | −●−− | |
| M | MIKE | −− | Z | ZULU | −−●● |
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