🔍 Key Concepts

• Standard radiotelephone pronunciation used internationally (ITU/IMO/ICAO) • How numbers are modified to avoid confusion over a noisy radio • Difference between normal English "nine" and the special radio form

💭 Think About

• Which option sounds most like the standard aviation/maritime radio phrase you’ve heard used for altitude or channel numbers? • On a poor-quality radio, which version of "nine" would be least likely to be confused with "five" or "one"? • Look for the choice that changes the word just enough to be clear, but does NOT add extra, unnecessary words.

✅ Before You Answer

• Verify which options add extra words that are NOT part of the number itself (those are usually incorrect). • Check which option matches the pattern of other radio numbers, like "tree" for 3 and "fife" for 5 (short, distinct words). • Confirm that the correct form focuses on how to say the digit 9 itself, not on saying the word "number" or "numeral".