This is a sole source action where the Naval Air Systems Command intends to award a contract modification to Vertex Modernization and Sustainment, LLC for additional support of the AN/AWW-13 Advanced Data Link System. The contract award is anticipated for the 3rd quarter of fiscal year 2026, with a base performance period of 12 months. The justification is that Vertex is cited as the only responsible source with the necessary proprietary data and experience to fulfill the requirement. While the action is sole source, interested parties may submit capability statements, copying the provided government contact. No budget or specific performance location is detailed in this synopsis.