Why are pilots advised to avoid National Security Areas?

Pilots are advised to avoid National Security Areas (NSAs) primarily because these areas are established specifically for national security purposes. The designation of an NSA indicates that the airspace is sensitive due to the potential presence of military and governmental installations or activities. Operating in or near these areas poses a risk to national security and can interfere with operations that are critical to the protection of the nation's interests.

While these areas may also relate to hazardous activities or involve military operations, the defining feature that necessitates avoidance is their purpose centered on national security. Consequently, pilots are instructed to steer clear of them to maintain a secure environment and to ensure compliance with regulations designed to safeguard national interests.