Roger That - Slang, usually used in radio transmissions such as military communications, meaning "I understand" or "I hear you." Synonymous with "I copy that." Often just "Roger"

The term 'Roger That' was first introduced in many American military missions, as it was a part of the phonetic alphabet. The term was popularized by the NASA Apollo missions and is most often used in military radio communications today.

The term is coined as an idiomatic, which is the acknowledgement and understanding that one received the message.



Recent Phonetic Alphabet[www.thebalancecareers.com]
Origin of the term[jakubmarian.com]
Roger That[www.urbandictionary.com]