What is the purpose of a Command Message in Link 16 communications?

The purpose of a Command Message in Link 16 communications is to exchange vital information such as threat warnings and orders among participating units. This type of message ensures that all members of a joint operations team are aware of significant developments in the operational environment, including any immediate threats or directives from command. Such communication is crucial for effective coordination and situational awareness, allowing units to respond appropriately based on the latest updates from higher command.

The other options, while involving communication, do not capture the primary function of Command Messages. For instance, while free text messages can be sent within the Link 16 system, they are not the main focus of Command Messages. Similarly, mission assignments and target designations can be part of operational communications but are typically categorized separately from the direct command-oriented messages. Frequency adjustments, while important for maintaining clear communication, are generally handled in different message types and are not the focus of Command Messages.