One-way voice link
Encyclopedia
A one-way voice link is a shortwave radio communication method used by spy
SPY
SPY is a three-letter acronym that may refer to:* SPY , ticker symbol for Standard & Poor's Depositary Receipts* SPY , a satirical monthly, trademarked all-caps* SPY , airport code for San Pédro, Côte d'Ivoire...

 networks to communicate with agents in the field. This system often employs recorders to transmit pre-recorded messages in real time or in 'burst transmission
Burst transmission
In telecommunication, the term burst transmission or data burst has the following meanings:# Any relatively high-bandwidth transmission over a short period of time...

s,' which minimize the time that a spy needs to be 'on the air.'

This transmission method was also used during the Falklands War
Falklands War
The Falklands War , also called the Falklands Conflict or Falklands Crisis, was fought in 1982 between Argentina and the United Kingdom over the disputed Falkland Islands and South Georgia and the South Sandwich Islands...

by UK elite forces to provide information about suitable troop landing areas.
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