Enhanced Short Term Conflict Alert (STCA) for Terminal Manoeuvring Areas (TMAs)

Available for deployment

Ground-based safety nets are an integral part of the ATM system. Using primarily ATS surveillance data, they provide warning times of up to two minutes. Upon receiving an alert, air traffic controllers are expected to immediately assess the situation and take appropriate action. A valuable safety net is the automated short-term conflict alert (STCA), a sophisticated algorithm which uses the track data to warn against possible short-term conflicts.

SJU references: #60/Release 1


  • Identification of conflicts, both enroute and in the terminal area
  • Reduced false alert rate while maintained genuine alert rate and warning times are maintained
  • Significant increase in safety of flight especially during complex operations
Download solution pack: 
1_Enhanced_STCA_for_TMA_Contextual_note.pdf (PDF, 208.9 KB)Download View View
2_Enhanced_STCA_for_TMA_Regulatory_Context.pdf (PDF, 359.7 KB)Download View View
3_Enhanced_STCA_for_TMA_VALR.pdf (PDF, 1.14 MB)Download View View
5_Enhanced_STCA_for_TMA_SPR-STCA.pdf (PDF, 1.03 MB)Download View View
6 Enhanced STCA for TMA_Preliminary Definition Report (PDF, 688.37 KB)Download View View
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