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  1. Capacity
  • Year report
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  • Environment
    • PRB monitoring
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      • Horizontal flight efficiency
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  • Capacity
    • PRB monitoring
    • En route performance
      • En route ATFM delay
      • Other indicators

  • Cost-efficiency
    • PRB monitoring
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Capacity - Bulgaria

Download Report

PRB monitoring

▪ Bulgaria registered zero minutes of average en route ATFM delay per flight during 2021, thus meeting the local breakdown value of 0.04.

▪ Delays should be considered in the context of lower traffic: In Bulgaria, IFR movements in 2021 were 41% lower than in 2019.

▪ Traffic is expected to grow, with 2019 levels likely being reached in 2023 (in base and high growth scenarios). However, delay performance was good in 2019 and no immediate capacity issues are foreseen.

▪ The yearly total of sector opening hours in Sofia ACC was 23,880, showing an 8.8% increase compared to 2020. Sector opening hours are 34.8% below 2019 levels.

▪ Sofia ACC registered 21.00 IFR movements per one sector opening hour in 2021, being 11.0% below 2019 levels.

En route performance

En route ATFM delay (KPI#1)

Focus on en route ATFM delay

Summary of capacity performance

Bulgaria experienced an increase in traffic from 376k flights in 2020 to 516k flights in 2021, with zero ATFM delay. However, traffic levels were still substantially below the 879k flights in 2019.

NSA’s assessment of capacity performance

The traffic has not recovered yet to the pre-crisis levels, however, it should duly be noted that a need for allotment of operational staff in 4-working flows is extremely demanding. The working flows have been put in place to restrict the spread of COVID 19 infection and to ensure the 24/7 service continuity. Besides, the allocation of 4-working flows came up unsatisfactory response to the match between demand and capacity in terms of available ATCOs, and therefore the number of working flows has been reduced to 3.
As a main priority to preserve the health of people Bulatsa was forced to switch to inflexible rostering, the freedom of ATCO’s movement in different shifts configurations has been restrained.

Monitoring process for capacity performance

The monitoring report contained information about health and sanitary screening in response to the COVID 19 pandemic, rather than information on the monitoring of capacity performance.

Capacity planning

Capacity planning was on weekly basis with regard to the traffic forecast delivered by NM. The longer term forecasts were of inaccurate nature leading to over- or underestimating the number of ATCOs needed for each particular day. Relaxation in traffic volumes brought about suspension of some RAD restrictions with no significant effect on capacity.

Application of Corrective Measures for Capacity (if applicable)

Not applicable.

Other indicators

Focus on ATCOs in operations

The number of additional ATCOs in OPS is due to:
- 6 ATCOs who completed their training and received their licences during the period;
- the remainder represents transition of FTEs from Other duties to OPS room.

 
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