Chapter 2: Airspace Classification, Operating Requirements, and Flight Restrictions also contains the FAA coordination facility and telephone number, the reason for the restriction,  and any other information deemed appropriate. The pilot should check the NOTAMs as part of flight  planning. Some of the purposes for establishing a TFR are: Since the events of September 11, 2001, the use of TFRs has become much more common. There  have been a number of incidents of aircraft incursions into TFRs that have resulted in pilots  undergoing security investigations and certificate suspensions. It is a pilot’s responsibility to be  aware of TFRs in their proposed area of flight. One way to check is to visit the FAA website,  www.tfr.faa.gov, and verify that there is not a TFR in the area. Parachute jump aircraft operations are published in the Chart Supplement U.S. (formerly  Airport/Facility Directory). Sites that are used frequently are depicted on sectional charts. Published VFR routes are for transitioning around, under, or through some complex airspace. Terms  such as VFR flyway, VFR corridor, Class B airspace VFR transition route, and terminal area VFR route  have been applied to such routes. These routes are generally found on VFR terminal area planning  charts. TRSAs are areas where participating pilots can receive additional radar services. The purpose of the  service is to provide separation between all IFR operations and participating VFR aircraft. The primary airport(s) within the TRSA become(s) Class D airspace. The remaining portion of the  TRSA overlies other controlled airspace, which is normally Class E airspace beginning at 700 or 1,200  feet and established to transition to/ from the en route/terminal environment. TRSAs are depicted  on VFR sectional charts and terminal area charts with a solid black line and altitudes for each  segment. The Class D portion is charted with a blue segmented line. Participation in TRSA services is  voluntary; however, pilots operating under VFR are encouraged to contact the radar approach  control and take advantage of TRSA service. NSAs consist of airspace of defined vertical and lateral dimensions established at locations where  there is a requirement for increased security and safety of ground facilities. Flight in NSAs may be  temporarily prohibited by regulation under the provisions of Title 14 of the Code of Federal  Regulations (14 CFR) part  99 and prohibitions are disseminated via NOTAM. Pilots are requested to  voluntarily avoid flying through these depicted areas. Parachute Jump Aircraft Operations Published VFR Routes Terminal Radar Service Areas (TRSAs) National Security Areas (NSAs) • Protect persons and property in the air or on the surface from an existing or imminent  hazard. • Provide a safe environment for the operation of disaster relief aircraft. • Prevent an unsafe congestion of sightseeing aircraft above an incident or event, that may  generate a high degree of public interest. • Protect declared national disasters for humanitarian reasons in the State of Hawaii. • Protect the President, Vice President, or other public figures. • Provide a safe environment for space agency operations. Remote Pilot – Small Unmanned Aircraft Systems Study Guide  11 