Which of the following is not among the four Fire Support functions?

The fire support functions are essential components of fire support planning and execution within military operations. Among these functions, the first is Command and Control, which involves the organization and management of fire support resources and ensuring effective communication. The second function is Support Forces in Contact, which focuses on providing timely and accurate fire support to ground forces engaged with the enemy. Additionally, Sustain and Protect the FS System is crucial as it pertains to the maintenance and security of fire support assets, ensuring they remain effective in combat situations.

"Coordinate Joint Operations" falls outside of the core fire support functions. While coordinating operations is important in a broader military context, it does not specifically pertain to the established fire support functions. Thus, the correct identification of options reveals that coordinating joint operations is not categorized among the primary functions that guide fire support teams in their operational effectiveness. This understanding highlights the distinct roles each function plays in the broader scope of military operations.