How can an aircraft operate in NAT Minimum Navigation Performance Specifications airspace if it lacks minimum navigation capability?

An aircraft can operate in NAT Minimum Navigation Performance Specifications (MNPS) airspace, which requires specific navigation capabilities, by requesting a deviation from the Administrator. This provision allows operators who do not meet the minimum requirements to potentially gain permission to enter and operate in the MNPS airspace, usually under certain conditions or limitations set forth by air traffic control or the appropriate regulatory authority.

The process involves a detailed assessment of the reasons for the deviation request and the capabilities of the aircraft in question. If the Administrator considers the request reasonable and safe based on the specific circumstances, it may grant authorization, thereby allowing the aircraft to operate in this strictly regulated airspace despite its lack of the minimum navigation capability.

In contrast, operating only between 2400Z and 0600Z or under VFR conditions might not be applicable since these do not address the essential requirement of obtaining clearance specifically for MNPS operations. Notifying the flight controller alone does not substitute for the necessary regulatory permission required for such operations, as it still needs proper authorization from the Administrator to ensure compliance with safety standards in high-density airspace.