The FAA recognizes the issue, and planning is already underway to replace these aging systems. However, the pace of this activity is well below the threshold required – at current funding levels, it will take more than 100 years to modernize this infrastructure.  It is important to understand that old electronic equipment is not sustainable indefinitely. 
Accelerating rates of component failures combined with parts obsolescence creates the risk of a cascade of field failures that will endanger NAS safety and affect the flying public. 
The Coalition is concerned that the aging infrastructure is well past its intended lifespan and will not be able to provide a safe, robust and resilient backbone to air traffic operations.  While the FAA and other ANSPs around the world have recognized the continual need for ground-based navigation and lighting systems (at a minimum, backup to GNSS services), the FAA has not prioritized using modern, and less expensive technology to maintain systems.