What phraseology is used to broadcast the indicated altitude of a non-radar identified aircraft?

The phraseology "Altitude INDICATES..." is used to communicate the indicated altitude of a non-radar identified aircraft because it conveys the information in a clear and standardized manner, which is essential for safety in aviation communication. The term "indicates" implies that the altitude being reported is based on the information provided by the aircraft, rather than a determination made by air traffic control. This is crucial for clarity, especially when dealing with non-radar scenarios where verification of the altitude may not be possible.

Using "INDICATES" helps to differentiate the information coming from the pilot's instrumentation, which might be more subject to variations and errors than directly observed radar data. Clear and consistent phraseology helps ensure that all parties involved—pilots, air traffic controllers, and other stakeholders—understand precisely what altitude is being referenced.

The other phrasing options do not carry the same level of precision or clarity required for effective communication in this context. For instance, "Altitude is..." may sound less formal and could lead to potential misunderstandings about the source of the altitude information, while “Altitude suggests...” introduces ambiguity about the reliability of the altitude being reported. Lastly, "Current altitude is..." may imply a direct observation which may not apply to a