What prefix is used to denote a constant reportable value in feet if the value is spoken as "less than"?

The prefix used to indicate a constant reportable value in feet when the value is expressed as "less than" is "LT." This abbreviation stands for "less than." In aviation communication, especially in contexts such as air traffic control or weather reporting, clarity is essential, and specific prefixes help convey critical information quickly and accurately.

Using "LT" before a value communicates to pilots or aviation personnel that the reported measurement is below a certain threshold, allowing for better decision-making regarding altitudes, safety, and operational procedures. This commonly understood shorthand helps maintain effective communication in the fast-paced aviation environment.