Why do soldiers say copy that?
“Copy” has its origins in Morse Code communications.
Morse Code operators would listen to transmissions and write down each letter or number immediately, a technique called “copying.” Once voice communications became possible, ‘copy’ was used to confirm whether a transmission was received..
What is the difference between copy that and 10 4?
10–4 is short for “message received.” I’m not sure where “copy” is used, but it means the same thing as the first two. The word comes from the terminology that telegraphers used to denote that they were receiving a message. They would say that they were copying, or had copied, a message.
What does copy that 10 4 mean?
Roger that! 10-4 is a way of saying “message received” in radio communications. It’s also used as a way to “you got it.”
What is the difference between copy that and Roger that?
No. Correct. In fact Roger is just a way of saying the letter R which means received.