FAA Ground School Practice Test

What is the correct method for stating 4500 feet MSL to ATC?

1. "Four thousand five hundred."

2. "Four five zero zero."

3. "4500 feet MSL."

4. "Four thousand, five hundred feet MSL."

The correct answer is: "Four thousand five hundred."

When communicating with Air Traffic Control (ATC), clarity and standardization in the phraseology used is essential to minimize misunderstandings. The preferred method of stating altitudes is to articulate the numbers in a way that is easily understood. Stating "Four thousand five hundred" provides a clear and concise verbal representation of the altitude 4500 feet MSL (Mean Sea Level) without unnecessary complexity. This method follows the established phraseology guidelines, making it easily recognizable and less prone to misinterpretation. It allows for efficient communication that is standard across aviation operations. Using numerical representations such as "Four five zero zero" can be overly complicated when spoken, and could lead to confusion, especially in busy ATC environments. Similarly, saying "4500 feet MSL" or "Four thousand, five hundred feet MSL" introduces unnecessary detail that can slow down communication. The focus in aviation communication is on brevity and clarity, making "Four thousand five hundred" the most effective choice.