How is the Jackson altimeter announced?

The correct way to announce the Jackson altimeter adheres to standardized aviation communication protocols, which prioritize clarity and brevity. The phrase "Jackson altimeter three zero one two" effectively communicates the location and the altimeter setting without unnecessary wording. This format makes it easy for pilots and air traffic controllers to understand and process the information quickly, which is essential for safety during flight operations.

The other options introduce superfluous elements or slightly alter the standard phrasing, which can lead to confusion or miscommunication. The focus is on delivering information in a clear and concise manner that aligns with aviation conventions. Thus, option B represents the most appropriate announcement format for the Jackson altimeter.