Final answer:
The NAT MNPA operates between 29,000 feet and 41,000 feet vertically, and between latitudes 27°N and 90°N.
Step-by-step explanation:
The North Atlantic Minimum Navigation Performance Airspace (NAT MNPA) has a lower vertical limit of 29,000 feet and an upper vertical limit of 41,000 feet, and it operates between latitudes 27°N and 90°N. These restrictions are designed to ensure safe separation between aircraft flying across the North Atlantic, which is one of the busiest oceanic airspace areas in the world. It's essential for pilots and air traffic controllers to be familiar with these limits for efficient and safe navigation.