What is TRA in Aviation? (Temporary Reserved Area (Airspace))

In the world of aviation, there are various terminologies and concepts that play a crucial role in ensuring safe and efficient operations. One such term is the Temporary Reserved Area (airspace), commonly abbreviated as TRA. Temporary Reserved Areas are specific regions in airspace that are temporarily designated for exclusive use by a particular aviation activity or event.

These areas are typically established by aviation authorities to ensure the safety and smooth flow of air traffic during special operations or events such as airshows, military exercises, or aerial sporting events. They serve as a means to control and restrict access to airspace, allowing the designated activity or event to take place without interference from other aircraft.

Temporary Reserved Area (airspace) in Detail

Temporary Reserved Areas are designated using a defined boundary, which is usually portrayed on aeronautical charts and communicated to pilots through NOTAMs (Notice to Airmen). These boundaries are depicted by specific latitude and longitude coordinates or other identifiable points, creating a three-dimensional volume in the sky. Pilots are required to adhere to these boundaries and respect the restrictions imposed within the Temporary Reserved Area.

The purpose of establishing Temporary Reserved Areas is to enhance safety by preventing conflicts between the designated activity or event and other aircraft sharing the same airspace. By limiting access to the area, authorities can manage traffic flow and minimize the risk of mid-air collisions or other potential hazards. This ensures that the activity or event can proceed without compromising the overall safety of the aviation system.

Temporary Reserved Areas vary in size and shape depending on the specific requirements of the activity or event. They can range from small circular areas to large rectangular portions of airspace. The duration of a Temporary Reserved Area’s establishment also varies, typically coinciding with the scheduled timeframe of the associated activity or event.

It is important to note that Temporary Reserved Areas do not completely close off the designated airspace. Instead, they establish specific restrictions within the airspace, such as altitude limits, speed restrictions, or routing requirements. These restrictions are put in place to ensure the safety of both the participants in the activity or event and other aircraft operating nearby.

Examples and Applications of Temporary Reserved Areas

Temporary Reserved Areas find applications in various aviation activities and events. Some common examples include:

1. Airshows: During airshows, temporary reserved areas are established to create a safe environment for aerial demonstrations and stunts. These areas often have specific altitude restrictions and secure boundaries to ensure the safety of spectators on the ground.

2. Military Exercises: Military exercises involving aircraft may require the establishment of temporary reserved areas to facilitate training maneuvers. These areas enable military aircraft to operate without interference from civilian air traffic, reducing the risk of accidents and enhancing operational security.

3. Sporting Events: Aerial sporting events such as air races or aerobatic competitions often require the establishment of temporary reserved areas. These areas provide a dedicated space for participants to perform their maneuvers without endangering other aircraft or structures.

These are just a few examples of how Temporary Reserved Areas are utilized in aviation. The specific requirements and restrictions for each activity or event are carefully determined by the relevant aviation authorities to ensure safety and efficiency.


In summary, Temporary Reserved Areas play a vital role in aviation by allowing the establishment of exclusive airspace for specific activities or events. These areas serve to enhance safety, manage air traffic flow, and minimize the risk of conflicts between various aircraft operating in the same airspace. Understanding and adhering to the boundaries and restrictions of Temporary Reserved Areas is crucial for pilots to ensure the overall safety and efficiency of the aviation system.

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