Chapter 28. National Security Areas

Section 1. General

28-1-1. DEFINITION

A National Security Area (NSA) consists of airspace of defined vertical and lateral dimensions established at locations where there is a requirement for increased security of ground facilities. Pilots are requested to voluntarily avoid flying through an NSA. When it is necessary to provide a greater level of security, flight in an NSA may be temporarily prohibited pursuant to the provisions of 14 CFR 99.7, Special Security Instructions. Where there is a need to restrict flight operations in an NSA, the required restriction will be issued by Airspace Regulations and ATC Procedures Group and disseminated via NOTAM.

28-1-2. PURPOSE

An NSA is designated to enhance national security and protect national assets.

28-1-3. CRITERIA

An NSA should be considered when a need to protect national assets or a need to protect an area in the interest of national security is identified.

28-1-4. DIMENSIONS

There are no standard dimensions for an NSA. The dimensions should be the minimum to promote the protection of the national asset or area identified.

28-1-5. CHARTING

NSAs must be depicted on aeronautical charts to inform users of the NAS regarding their vertical and lateral dimensions. Additionally, a note must be depicted on the chart adjacent to the NSA stating the requested avoidance altitude.

28-1-6. EXPIRATION, SUSPENSION, OR REVOCATION

An NSA does not expire. However, an NSA may be suspended or revoked at the discretion of Airspace Regulations and ATC Procedures Group.