radiotelegraphy
Wireless dot-dash communication
Radiotelegraphy is the transmission of telegraph signals by radio waves rather than through wires.
Before voice communication became practical, this was the primary method of wireless communication—operators sent Morse code between ships and shore stations, or across continents.
The technique enabled the Titanic's distress calls and dominated long-distance communication through the early twentieth century.
Signal-emitting device
- receiverOne who accepts transmission
- antennaBroadcast signal receiver
- frequencyRate of recurrence
- wavelengthSpatial repetition interval
modulation · electromagnetic · shortwave · longwave · spark-gap · oscillator · amplifier · RF
Between boat and land
- distressSevere anxiety or suffering
- MarconiRadio telegraphy pioneer
- TitanicIll-fated 1912 vessel
- radiogramMessage sent wirelessly
call-sign · watch · bridge · shipboard · Atlantic · transatlantic · liner · naval
Transmitted communication
- transmissionSending of information
- relayStage-by-stage transmission
- stationFixed stopping point
- networkInterconnected system
broadcast · reception · signal · traffic · dispatch · correspondence · intercept · encode
transmitter
Signal-emitting device
wavelength · modulation · electromagnetic · shortwave · longwave · spark-gap · oscillator · amplifier · RF · bandwidth
ship-to-shore
Between boat and land
radiogram · call-sign · watch · bridge · shipboard · Atlantic · transatlantic · liner · naval · fleet
message
Transmitted communication
- transmissionSending of information
- relayStage-by-stage transmission
- stationFixed stopping point
network · broadcast · reception · signal · traffic · dispatch · correspondence · intercept · encode · decode
dot
Small circular mark
keying · code · SOS · operator · telegrapher · key · sounder · fist · bug · paddle
spark
Tiny fiery particle
- wirelessUntethered signal transmission
- VictorianOf a prim era
- EdwardianOf early twentieth-century Britain
cable · transatlantic · invention · pioneer · patent · Titanic · wartime · military · commercial · amateur
radiotelegraphyradiotelephony
Voice over radio waves
voice transmission · radio broadcasting · FM radio · broadcasting