Which of the following describes full break-in CW operation (QSK)?
Breaking stations send the Morse code prosign “BK”
Automatic keyers, instead of hand keys, are used to send Morse code
An operator must activate a manual send/receive switch before and after every transmission
Transmitting stations can receive between code characters and elements✓Bonne réponse
Explication
In full break-in the transmitter drops out and the receiver comes back between individual code elements, so the sending operator hears the frequency during the gaps in their own sending. That is what lets another station interrupt in mid-transmission.