SOS

E314300

SOS is an internationally recognized Morse code distress signal used by ships and aircraft to indicate extreme emergency and request immediate assistance.

All labels observed (1)

Label Occurrences
SOS canonical 2

How this entity was disambiguated

Statements (46)

Predicate Object
instanceOf Morse code distress signal
emergency signal
internationally recognized signal
adoptedBy International Radiotelegraph Conference
maritime authorities worldwide
associatedWith Morse code
cameIntoEffect 1908
canBeTransmittedBy horn
radio
signal lamp
tapping
whistle
category Morse code sequences
distress signals
chosenFor distinctive pattern
ease of recognition
simplicity in Morse code
codePattern ...---...
communicationMedium light signals
radio telegraphy
sound signals
wireless telegraphy
emergencyLevel grave and imminent danger
hasThreePartStructure end group of three dots
middle group of three dashes
start group of three dots
introducedAsInternationalStandard 1906
legalContext international maritime regulations
morseRepresentation three short, three long, three short
notAnAcronymOf Save Our Ship
Save Our Souls
patternLength nine Morse elements
recognizedBy International Telecommunication Union
maritime law
replaced CQD distress signal
status universal distress signal
stillUsedIn Morse code operations
emergency signaling without speech
supersededInVoiceRadioBy Mayday
usedBy aircraft
ships
usedFor indicating extreme emergency
requesting immediate assistance
usedIn aeronautical communication
maritime communication
visualRepresentation SOS in Latin letters

How these facts were elicited

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.