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  • Capacity
    • PRB monitoring
    • En route performance
      • En route ATFM delay
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      • Arrival ATFM delay
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Capacity - Romania

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PRB monitoring

▪ Romania registered 0.20 minutes of average en route ATFM delay per flight during 2023 which has been adjusted to 0.16 during the post-ops adjustment process, thus not achieving the local target value of 0.04. Delays in Romania increased by 0.16 minutes per flight year-on-year.

▪ Delays accumulated between May and September, due to adverse weather conditions.

▪ The share of delayed flights with delays longer than 15 minutes in Romania increased by 43 p.p. compared to 2022 and was higher than 2019 values.

▪ The average number of IFR movements was 3% above 2019 levels in Romania in 2023.

▪ The number of ATCOs in OPS is expected to increase by 12% by 2024, with the actual value being below the 2023 plan in Bucharest by 3 FTEs.

▪ The yearly total of sector opening hours in Bucharest ACC was 69,428, showing a 1.2% increase compared to 2022. Sector opening hours are 1.2% above 2019 levels.

▪ Bucharest ACC registered 10.94 IFR movements per one sector opening hour in 2023, being 2.0% above 2019 levels.

▪ Romania was badly affected by adverse weather in 2023, resulting in unusually high levels of en route ATFM delay. As the uncertainty of weather impact is likely to increase, Romania should work closely with the NM and all concerned stakeholders to mitigate weather impact as much as possible.

▪ Romania registered an average airport arrival ATFM delay of nearly zero minutes per flight in 2023, achieving the local target of 0.39 minutes.

▪ Compared to 2022, average arrival ATFM delays in Romania were 83% lower in 2023, while the number of IFR arrivals increased by 9%.

▪ The main reason for delays was other, non-ATC related causes, accounting for 100% of delays.

En route performance

En route ATFM delay (KPI#1)

Focus on en route ATFM delay

Summary of capacity performance

Romania experienced an increase in traffic from 656k flights in 2022, with zero en route ATFM delay, to 769k flights in 2023 with 131k minutes of en route ATFM delay. In 2019, Romania had 747k flights with 85k minutes of en route ATFM delay. In 2023, all ATFM delays were attributed to adverse weather.

There was an additional 33k minutes of delay originating in Romania that were re-attributed to DFS via the NM post operations delay attribution process, according to the NMB agreement for eNM/S23 measures, to ameliorate capacity shortfalls in Karlsruhe UAC.

NSA’s assessment of capacity performance

The year 2023 continues to be deeply impacted, both economically and operationally, by the war in Ukraine. The Russian invasion and the subsequent restrictions and sanctions imposed have determined traffic flows that were already circumnavigating the conflict area following the events in 2014 to be pushed further to Romania’s south-western part. Furthermore, new traffic flows prefer to cross atypically the Romanian airspace in this geopolitical context. Average distance/flight has increased compared to 2019 and this is visible also in the service units evolution that has outpaced the IFR movements trend in comparison with 2019. These, combined with the increased military activity, including ad-hoc activity focused not only in the NE part of Romania, but in the entirety of the airspace, have generated an increase in complexity whilst also forcing operations into a narrower corridor to keep AUs away from conflict zones.

Despite the swift rebound of traffic in Romanian airspace, nearly reaching pre-pandemic levels with 97% of 2019 IFR movements and surpassing those levels with 104% in terms of service units, the complexity has increased due to re-routings and heightened military activity from the war in Ukraine. Nevertheless, ROMATSA has managed to maintain zero (CRSTMP) delays attributable to ATC, with delays occurring only due to weather conditions.

Monitoring process for capacity performance

ROMATSA provided regularly inputs on capacity availability in the context of NOP Rolling Seasonal Plan implemented by the Network manager at European network level. The expected en-route performance was and is regularly evaluated by the NM for each ACC, including Bucuresti ACC, in terms of planned/maximum sector openings in relation with the estimated traffic demand.

The performance target has not been met solely due to weather related restrictions. From 121 301 ATFM delay minutes incurred in 2023, the total of 100% were generated due to weather reasons. The delay due to all other reasons, incl. ATC capacity and stafffing, were zero which confirms that there was no capacity gap in 2023.

Capacity planning

The capacity as previously planned and published within an annual NOP (Network Operatios Plan) has been adapted accordingly by adoption of capacity plans under a NOP Rolling Seasonal Plan format, including periods of 6 weeks, based on the expected traffic demand regularly provided by the Network Manager. These plans refer to:
- sector openings;
- maximum possible sector openings;
- availability of support of operational staff;
- special events and projects, etc.

Bucuresti ACC ensured a stable sector opening plan with no sector capacity reduction, with the possibility to increase the number of sectors when traffic increased.

Application of Corrective Measures for Capacity (if applicable)

The performance target has not been met solely due to weather related restrictions. From 121 301 ATFM delay minutes incurred in 2023, the total of 100% were generated due to weather reasons. The delay due to all other reasons, incl. ATC capacity and stafffing, were zero which confirms that there was no capacity gap in 2023.

Significant Risks Likely to Affect Capacity Performance in Reference Period

Traffic values have increased in the aftermath of the COVID-19 pandemic and due to the re-routings caused by the war in Ukraine and the restrictions imposed. Traffic flows that were already circumnavigating the conflict area following the events in 2014 have been pushed further to Romania’s south-western part. Furthermore, new traffic flows prefer to cross atypically the Romanian airspace in this geopolitical context. Average distance/flight has increased compared to 2019 and this is visible also in the service units evolution. From April 2023, the number of daily IFR movements in Romanian airspace has surpassed 2019 levels. These, combined with the increased military activity have generated an increase in complexity.

Another risk is generated by ROMATSA’s ageing ATCO personnel, especially in ACC Bucharest, where more than 1/3 of ATCOs are over 50 years old and will be over age 55 at the end of RP3. It takes between 3 to 5 years to fully train and authorize an ATCO for ACC, therefore a recruitment process was started in 2017 to guarantee proper staffing levels to ensure safety and capacity.

Additional Information Related to Russia’s War of Aggression Against Ukraine

Traffic flows that were already circumnavigating the conflict area following the events in 2014 have been pushed further to Romania’s south-western part (Examples of traffic flows: Russian Federation – Turkey, Turkey - Sweden, Poland - Israel, Lithuania - Turkey, Romania - Poland, Turkey - Finland, Russian Federation - Egypt, Poland - Qatar, United Kingdom - Romania, Turkey - Norway).

Furthermore, new traffic flows prefer to cross atypically the Romanian airspace in this geopolitical context (Examples of the most affected flows : Russia-Turkey, United Kingdom – India, Republic of Korea – Germany, Australia - United Kingdom, Kazakhstan – Hungary, Qatar – Sweden, Pakistan - United Kingdom). These, combined with the increased military activity, scheduled or ad-hoc, focused not only in the NE part of Romania, but in the entirety of the airspace, have generated an increase in complexity.

In 2023, ROMATSA managed to mantain a high-level of performance for en route capacity, despite a challenging summer season, with traffic values above the 2019 level, the reduction of available airspace due to military activity and significant weather disruptions.

Through application of FUA principles, civil-military coordination helped mitigate any possible impacts on en-route capacity performance.

En route Capacity Incentive Scheme

The incentive scheme is under review by the European Commission.

Other indicators

Focus on ATCOs in operations

ROMATSA has continued its training and recruitment process as planned to replace ageing ATCOs from ACC Bucharest. 21 ATCOs who had previously been counted at 0.5 FTE have further extended their competencies (new sectors licences) and thus 10.5 FTE have been added. In the same time 8 ATCOs have left the OPS room, out of which 7 retired and 1 lost his licence due to medical reasons.

Terminal performance

Arrival ATFM delay (KPI#2)

Focus on arrival ATFM delay

Romania includes 2 airports under RP3 monitoring. However, in accordance with IR (EU) 2019/317 and the traffic figures, only Bucharest/Otopeni (LROP) must be monitored for the pre-departure delay indicators. The Airport Operator Data Flow, necessary for the monitoring of these delays, is correctly implemented where required and the monitoring of all capacity indicators can be performed. The quality of the reporting from Bucharest improved in 2023, allowing for the calculation of the ATC pre-departure delay indicator. Traffic at these 2 airports in 2023 was still 9% lower than in 2019, but showed a 9% increase with respect to 2022.

Average arrival ATFM delays in 2023 were zero at both Romanian airports. The national target was met. ATFM slot adherence remained very hight (2023: 99.6%; 2022: 99.4%) .

Average arrival ATFM delays at both Romanian airports under monitoring in 2023 were zero min/arr, with only 54 minutes recorded in the entire year for Bucharest/Otopeni.

According to the Romanian monitoring report: ROMATSA and Bucharest Airports National Company continue to work together to ensure optimum capacity level at terminal level as this impacts the entire network. On one hand ROMATSA has implemented at Otopeni TWR a different ATM system with ASMGCS component, composed of a surveillance subsystem (operational for over three years) and an electronic flight strips subsystem (transferred into operations on April 8th 2019 ), interfaced via OLDI with the System covering the rest of the ATS units. There is in place also a common procedure between Bucharest Airports National Company and TWR Otopeni for repairing works periods on the manoeuvering area, i.e. pre-established alternative standard taxi routes. According to EU Reg 255/2010, a common procedure regarding ATFM for the regulation of traffic in situations that may influence the airport’s capacity is in place. Implementation of AMAN at Bucharest TMA starts this year and will be finalised at the beginning of RP4, while the upgrade of ASMGCS to include Advanced Tower Messaging (implementation of DPI messages) is ongoing and will be finalised this year.


Romanian performance plan sets a national target on arrival ATFM delay for 2023 of 0.39 min/arr. This target was met, with no delays recorded at any of the Romanian airports under monitoring. The incentive scheme uses modulated pivot values limited to CRSTMP delay causes, with a pivot value for 2023 o 0.04 min/arr. The actual value for CRSTMP was 0 min/arr in 2023 (since also all delays regardless of the reason are zero). The NSA calculates a bonus of RON 545 985.

Other terminal performance indicators (PI#1-3)

Airport level
Airport name
Avg arrival ATFM delay (KPI#2)
Slot adherence (PI#1)
ATC pre departure delay (PI#2)
All causes pre departure delay (PI#3)
2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024
Bucharest AUREL VLAICU NA NA NA NA NA 100.0% 100.0% 99.2% 99.5% NA% NA NA NA NA NA NA NA NA NA NA
Bucharest HENRI COANDA 0.00 NA 0.01 0.00 NA 96.6% 98.1% 99.4% 99.6% NA% 0.10 0.21 0.16 0.34 NA 10.2 12.4 22.7 21.2 NA
Focus on performance indicators at airport level

ATFM slot adherence

The national average, driven by Bucharest/Otopeni, was an excellent 99.6%. With regard to the 0.4% of flights that did not adhere, 0.3% was early and 0.1% was late. According to the Romanian monitoring report: Performance improved compared to 2022. According to EU Reg 255/2010 a common procedure regarding ATFM for the regulation of traffic in situations that may influence the airport’s capacity is in place between Bucharest Airports National Company and ROMATSA.

ATC pre-departure delay

The calculation of the ATC pre-departure delay is based on the data provided by the airport operators through the Airport Operator Data Flow (APDF) which is properly implemented at Bucharest/Otopeni (the only Romanian airport subject to monitoring of this indicator). The quality of the data provided improved in 2023, allowing for the calculation of this indicator for the first time in RP3. The annual average of the ATC pre-departure delay in 2023 at Budapest (LROP) was 0.37 min/dep.

According to the Romanian monitoring report: In 2023 departure delays at LROP were mainly due to aerodrome capacity. ROMATSA and Bucharest Airports National Company continue to work together to ensure optimum capacity level at terminal level as this impacts the entire network. ROMATSA has implemented at Otopeni TWR a different ATM system with ASMGCS component, composed of a surveillance subsystem (operational for over three years) and an electronic flight strips subsystem (transferred into operations on April 8th 2019 ), interfaced via OLDI with the System covering the rest of the ATS units. An upgrade to the system will be finalised in 2024 to include Advanced Tower Messaging. There is in place also a common procedure between Bucharest Airports National Company and TWR Otopeni for repairing/maintenance periods on the manoeuvering area, i.e. pre-established alternative standard taxi routes. According to EU Reg 255/2010, a common procedure regarding ATFM for the regulation of traffic in situations that may influence the airport’s capacity is in place. Implementation of AMAN at Bucuresti TMA starts this year and will be finalised in the beginning of RP4.

All causes pre-departure delay

The total (all causes) delay in the actual off block time at Bucharest/Otopeni slightly decreased in 2023 (LROP: 2020: 10.22 min/dep.; 2021: 12.45 min/dep.; 2022: 22.67 min/dep.; 2023: 21.23 min/dep.). The Romanian monitoring report mentions the same measures taken as for the ATC pre-departure delay (see above).

 
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