Final answer:
The DGNS (Digital Global Navigation Satellite System) can hold a varying number of flight plans depending on the specific system and implementation, often in the hundreds, but the exact number would require manufacturer's specifications.
Step-by-step explanation:
The student is asking about the capacity of the Digital Global Navigation Satellite System (DGNS) to hold flight plans. This is a system related to aviation technology, particularly in flight management systems (FMS) and air traffic control (ATC). Depending on the specific system and its implementation, the capacity to hold flight plans can vary. For instance, sophisticated FMS can often store hundreds of flight plans, but the exact number would require referencing the manufacturer's specifications for the DGNS of interest.