How would one correctly say FL304 in aviation terminology?

In aviation terminology, FL304 would be correctly spoken as "Flight level three zero four." This format is used to clearly convey altitude levels in a way that minimizes misunderstanding, especially in radio communication where clarity is essential. Each digit of the altitude is pronounced separately after stating "flight level," allowing for unambiguous transmission.

The reason this convention is used relates to the potential for misinterpretation in voice communications, where similar-sounding numbers could lead to confusion. By articulating the numbers individually, like "three zero four," pilots and air traffic controllers can prevent errors that could arise if the altitude were stated as "three hundred four," which refers to a different altitude altogether within the context of aviation.

Using this verbal convention is a critical part of air traffic control communications, ensuring that all parties clearly understand the intended flight level during operations.