Which message format is used for addressing an urgency message to all stations?

The correct choice for addressing an urgency message to all stations is the phrase "ALL STATIONS, ALL STATIONS, ALL STATIONS." This specific format is used in maritime and aeronautical communication to clearly indicate that a message is urgent and must be heard by all recipients.

Using "ALL STATIONS" emphasizes the importance of the message and ensures that it captures the attention of every station in the vicinity, which is crucial during emergency situations where quick dissemination of information can make a significant difference.

The other options, while relevant in different contexts, do not serve the specific purpose of addressing an urgency message to all stations. For example, "PAN PAN, PAN PAN, PAN PAN" is indeed a standard phrasing for urgency calls, but it is typically followed by the details of the situation and does not directly address multiple stations in the same emphatic manner. Similarly, “THIS IS CESSNA FOXTROT NOVEMBER JULIETT INDIA” represents the format for identifying a specific station rather than addressing all stations collectively. “OVER” is a term used to indicate that a transmission has concluded but does not convey urgency or direct the message to multiple stations.