Why are INCONUS limits placed on IPF OVRD?

Why are INCONUS limits placed on IPF OVRD?

• A. Because IPF OVRD is not used INCONUS
• B. Because IPF OVRD is not used or directed
• C. Because of encryption restrictions
• D. Because these frequencies are shared with aeronautical radionavigation

Answer: (D)

INCONUS limits on IPF OVRD exist to protect aeronautical radionavigation services. The frequencies used by IPF OVRD in the continental United States overlap with bands designated for civil aviation navigation and safety systems. To prevent any interference with instruments that aircraft rely on for safe navigation, regulatory rules restrict how IPF OVRD can operate in this region. In other words, the practice is driven by spectrum sharing with aviation navigation, not by encryption rules or whether IPF OVRD is used or directed in general.

INCONUS limits on IPF OVRD exist to protect aeronautical radionavigation services. The frequencies used by IPF OVRD in the continental United States overlap with bands designated for civil aviation navigation and safety systems. To prevent any interference with instruments that aircraft rely on for safe navigation, regulatory rules restrict how IPF OVRD can operate in this region. In other words, the practice is driven by spectrum sharing with aviation navigation, not by encryption rules or whether IPF OVRD is used or directed in general.