Published in AIPs for SEPARATE USE OF AIRSPACE
all Airspace Users and ATS Providers -the Temporary Segregated Area reserves
Information
TSA
airspace for the exclusive use of specific users.

FULLY SEGREGATED

Edition: 2.0 Released Issue  Page 3-5
3.2.3.4.2  AOs will normally use the permanent ATS routes established outside TSAs, TRAs and/or PCAs. However, if available, they will be allowed to file a CDR or even a direct track (not in case of a TSA) and will therefore be re-routed around an active PCA or TRA. When an area (TRA, TSA) is not active, the traffic may expect “short track” through it on the initiative of the ATS Provider.
3.2.3.5  Guidelines for the Establishment of Prior Co-ordination Airspace (PCA)
3.2.3.5.1  The RCA procedure (see Chapter 2.3.5 of the EUROCONTROL Handbook for Airspace Management) and PCA procedure will be implemented exclusively within controlled airspace in known traffic environment, and their use will be complementary according to co-ordination procedures laid down in associated LoAs to ensure a maximum joint use of airspace.
3.2.3.5.2  The purpose of PCA is to temporarily book an airspace, for the use of specific users, that is located outside the major GAT traffic flows. A PCA should be established within a controlled airspace in a known traffic environment, where en-route GAT VFR flights are not permitted (e.g. Class C above FL 195 -see Section 2) to guarantee that information on the airspace status will be provided to the required audience.
3.2.3.5.3  A PCA will mainly be used to separate general and commercial aviation operating in controlled airspace in a known traffic environment from high-speed military operations such as air combat training and formation flying.
3.2.3.6  Guidelines for the Establishment of Temporary Reserved Area (TRA) or Temporary Segregated Area (TSA)
3.2.3.6.1  When there is a need to inform in advance airspace users of any potential activity requiring to temporarily reserve/segregate an area and/or when such activity is located within a busy GAT environment, a TRA/TSA will be created and published in AIPs.
3.2.3.6.2  For cross-border activities, the same guidelines will be used for the establishment of a Cross-Border Area (CBA) either in a form of a TRA or a TSA. Specific elements which require to be taken into consideration for the establishment of such TRA or TSA across international boundaries are listed in the EUROCONTROL Handbook for Airspace Management – Section 3.
3.2.3.7  Criteria for pre-defining airspace reservation volumes (TRA/TSA)
3.2.3.7.1  TRA and TSA will be airspace of pre-defined dimensions but, if several activities are foreseen to take place in the area, they may be subdivided at Level 1 and published as such in AIPs. AMCs may then be able to allocate them fully or partially in accordance with national policy.
3.2.3.7.2  TRA and TSA are established as pre-defined volumes of airspace so as to safely encompass either pre-planned military-type missions within a specific area (e.g. combat manoeuvres, practice air intercepts,....) or activities in movement (e.g. aerial refuelling, en-route mass formations,....). TRA and TSA could also be required for civil activities such as special test-flights or even for radar vectoring within pre-defined areas of potentially very high density of traffic.
3.2.3.7.3  For the delineation of any reserved airspace volumes (TRA or TSA), the State 'Due Regard' obligation should be strategically observed so that activity in that airspace structure will not endanger non-participating aircraft operating at or near its published limits. Distinct/individual boundaries should preferably be defined for activities in adjacent airspace. However, where it is necessary to define a common boundary, appropriate measures governing operations in the proximity of the common boundary should be established (see Section 1).
　
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