Importance of Saying "Roger" in Aviation and Military Communication
Pilots and military personnel use "Roger" instead of "yes" to ensure clarity and avoid misunderstandings in high-pressure environments. Here are the main reasons for this practice:

Clarity and Distinction
Two-Syllable Word: "Roger" consists of two syllables, making it more distinct than the single-syllable "yes." This distinction reduces the likelihood of miscommunication, especially in noisy conditions where radio quality may be poor.
Historical Context
Origin in Radio Communication: The term "Roger" originated from early radio communication, where letters of the phonetic alphabet were used to distinguish sounds clearly. "R" stood for "Received," and over time, "Roger" was adopted in communications.
Standardization
Phonetic Alphabet Usage: In the NATO phonetic alphabet, original terms like "Roger" have been standardized for clarity across various aviation and military platforms. Though it was later replaced by "Romeo" in official use, "Roger" continues to be widely recognized and used.
Reduce Ambiguity
Avoiding Confusion: The word "yes" can be misinterpreted, especially in environments filled with chatter, static, or other distractions. "Roger" guarantees an affirmative without the potential for confusion.
Confirmation of Information
Acknowledgment: "Roger" serves as a clear acknowledgment from the pilot or personnel that they have understood a command or received information, reinforcing the communication's effectiveness.
In summary, "Roger" offers a reliable way to confirm understanding in aviation and military communications, effectively minimizing errors and enhancing safety.