Which type of area would require restricted access during military operations?

National Security Areas are specific areas where flight operations are restricted due to national security concerns. These areas are established to protect sensitive facilities and activities, and access is often limited to minimize risks associated with military operations, potential threats, or other security issues. When military operations are underway, these areas become even more critical for maintaining the safety and security of both military personnel and the surrounding public.

The designation of National Security Areas reflects a proactive approach to safeguarding important sites, which may include military bases, government installations, or critical infrastructure. Operating within these areas during military activities is tightly controlled to prevent unauthorized access and to ensure that air traffic doesn't interfere with operations deemed sensitive to national security.

In contrast, controlled airspace generally involves specific rules for aircraft operation but does not necessarily restrict access based solely on military activities. Navigational corridors are established paths to assist pilots in navigation but are not specifically linked to military restrictions. Private airparks are related to general aviation and do not involve restricted access during military operations.