International Virtual Aviation Organisation. Letter of Agreement. between. and. Effective: 15/05/2017 Edition: 2

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1 Brindisi ACC (LIBB) IVAO Italy Letter of Agreement between and Effective: 15/05/2017 Edition: 2 Zagreb ACC (LDZO) IVAO Croatia 1

2 1. Purpose The purpose of this Letter of Agreement is to define the coordination procedures to be applied between Brindisi ACC and Zagreb ACC when providing ATS to General Air Traffic (IFR/VFR) and Operational Air Traffic on the IVAO Network. These procedures are supplementary to those specified in ICAO, EUROCONTROL and national documents. 2. Areas of Responsibility Vertical limits of Brindisi ACC are: LIBB_ND_CTR LIBB_EU_CTR GND UNL FL 325 UNL LIBB_EL_CTR GND FL 325 The ATS unit in charge of the Brindisi FIR and UIR is Brindisi Radar and it consists of one primary sector (LIBB_ND_CTR) and two secondary sectors (LIBB_EU_CTR; LIBB_EL_CTR), which can be opened following a priority detailed here. Lateral limits of Brindisi ACC are shown on the diagram below: 2

3 Vertical limits of Zagreb ACC are: Above TMA Split FL205 FL660 Above TMA Dubrovnik FL 205 FL 660 Below above-mentioned lower limit FLs (and if above 1000 ft AGL) aircraft shall be transferred to the respective ATS approach unit Split Radar (LDSP APP), Dubrovnik Radar (LDDU APP). Lateral limits of Zagreb ACC along with lateral limits of TMA Split and TMA Dubrovnik are shown on the diagram below: Split TMA 1000 ft AGL-FL205 Split<FL125 Dubrovnik FL125-FL205 Dubrovnik TMA 1000 ft AGL-FL205 Brindisi ACC FL325-FL460 Red line depicts AOR between Zagreb ACC and respective TMAs and Brindisi FIR. Airspace between yellow and green lines is shared between Split and Dubrovnik TMA. Airspace northwest of the yellow line is Split TMA. Airspace southeast of the green line is Dubrovnik TMA. Airspace that is the southernmost and is labelled Brindisi ACC is delegated to Brindisi ACC by Zagreb ACC between FL 325 and FL

4 3. ATS Units Login name Callsign Frequency LDZO_CTR Zagreb Radar LDSP_APP Split Radar LDDU_APP Dubrovnik Radar LIBB_ND_CTR Brindisi (North) Radar LIBB_EU_CTR Brindisi (East Upper) Radar LIBB_EL_CTR Brindisi (Est Lower) Radar Sectorization 4.1. Brindisi ACC and TMAs LIBB_ND_CTR GND UNL G < FL195 C > FL195 FL660 LIBB_EL_CTR GND UNL If EU_CTR is available GND FL325 G < FL195 C > FL195 FL660 LIBB_EU_CTR FL325 - FL660 C FL660- UNL G 4

5 4.2. Zagreb ACC and TMAs Zagreb ACC has only one ACC sector (LDZO_CTR) and 2 TMA sectors bordering Brindisi FIR (Split and Dubrovnik). LDZO_CTR ft AGL FL660 D <FL115 C >FL115 FL660 LDSP_APP ft AGL FL205 D < 7500 ft C > 7500 ft FL205 LDDU_APP ft AGL FL205 D < 7500 ft C > 7500 ft FL Transfer of Control Transfer of communication shall normally occur 2 (two) minutes before the aircraft reaches respective Transfer of Control point (FIR boundary), and not later than reaching the TOC point. Transfer of control occurs when the aircraft passes TOC point (FIR boundary). Transferring ATC unit is responsible for the aircraft's vertical and horizontal separation until it passes the TOC point. Traffic shall be handed over with a minimum horizontal separation of 10 nm between aircraft, maintaining this distance or increasing (if necessary on parallel headings or by using speed control) or 1000 feet vertical separation (between RVSM approved aircraft, and aircraft below FL290) and 2000 feet in other cases. Unless coordinated via IvAc Chat or IVAO Intercom or released as specified in this LoA, the receiving ATC unit shall not give aircraft a clearance or instruction to climb or descend until it has passed the TOC point. Transferred aircraft are released for turns not greater than ATS Routes, Coordination Points and Flight Level Allocation 6.1. Free Route Airspace FRAIT (Free Route Airspace Italy) is available H24 from FL 335. If there is an airway after the Transfer Point (this means that aircraft won t enter in FRAIT airspace) traffic must be cleared at maximum FL 320 or FL 330. Cross-border FRA procedures (SEAFRA South East Axis Free Route Airspace) are available H24 from FL 325 up to FL 660 in the airspace formed from airspaces of Zagreb FIR/UIR, Sarajevo FIR and Beograd FIR/UIR excluding areas where responsibility for the provision of ATS is delegated to ATS units other than Zagreb ACC or Beograd ATCC and including area where responsibility for the provision of ATS is delegated to Zagreb ACC. 5

6 6.2. Cruise Flight Level Allocation Flights from Zagreb ACC to Brindisi ACC Waypoint designator AIOSA KATTI VELUG XAMIT XOLTA GISAM BEVIS FL Allocation Flights from Brindisi ACC to Zagreb ACC Waypoint designator AIOSA GISAM KATTI VAPUP XOLTA BEVIS FL Allocation 6.3. Coordination for arrival/departure flights Symbol explanation: = descending to (not levelled); = climbing to (not levelled); + = above; = below Flights arriving/departing Brindisi FIR ATS Route COP/TOC FL Allocation Conditions UP748 AIOSA 230 ARR LIBD UL862 AIOSA 230 ARR LIBD UL862 AIOSA 250 ARR LIBR UM169 KATTI 220 ARR LIBP UN924 VELUG 200 ARR LIBP 6

7 P748 AIOSA 240 DEP LIBD L862 AIOSA 240 DEP LIBD L862 AIOSA 260 DEP LIBR L5 VARUP DEP LIBP M169 KATTI 230 DEP LIBP A48 BEVIS* ARR LIBR/LIBD A48 BEVIS* DEP LIBR/LIBR *Temporary delegated area Italy AIP ENR6-1-1 / NOT indicated as specific FL too far from the A/D Flights arriving/departing Zagreb FIR DEST/DEP COP/TOC FL Allocation Conditions DEST LDDU ALL FL DEST LDSP ALL FL VFR Flights 7.1. Brindisi FIR Brindisi Information (LIBB_FSS) on MHz frequency provides the Flight Information and Alert Service. If Brindisi Information is not online, the functions will be carried out by the appropriate ACC sector. In this case the ATC service takes precedence over the FIS Zagreb FIR Unless specially authorized by Zagreb ACC, VFR flights within FIR Zagreb shall not be operated above FL 195. Such special approval shall not be granted for enroutevfr flights. For departure and arrival from/to controlled and uncontrolled airports in Croatia VFR traffic shall use VFR reporting points prescribed on the charts or in the VFR Manual Croatia. 7

8 8. Validity This Letter of Agreement becomes effective 15/05/2017, and supersedes the Letter of Agreement between Brindisi ACC and Zagreb ACC dated 01/09/2009. m.p. ATC Ops Department Italy Brindisi FIR Staff m.p. Marko Bošnjak Director Croatia Date: 05/05/2017 8

9 A.1 Definitions ATS Area of Responsibility An airspace of defined dimensions where a sole ATS unit has responsibility for providing air traffic services. General Air Traffic (GAT) All flights which are conducted in accordance with the rules and procedures of ICAO and/or the national civil aviation regulations and legislation. Operational Air Traffic (OAT) All flights which do not comply with the provisions stated for GAT and for which rules and procedures have been specified by appropriate national authorities. Reduced Vertical Separation Minimum (RVSM) A vertical separation minimum of 300 m (1 000 ft) which is applied between FL 290 and FL 410 inclusive, on the basis of regional air navigation agreements and in accordance with conditions specified therein. Release for Climb An authorization for the accepting unit to climb (a) specific aircraft before the transfer of control. Note: The transferring unit/sector remains responsible within its Area of Responsibility for separation between the transferred aircraft and other aircraft unknown to the accepting unit/sector, unless otherwise agreed. Release for Descent An authorization for the accepting unit to descend (a) specific aircraft before the transfer of control. Note: The transferring unit/sector remains responsible within its Area of Responsibility for separation between the transferred aircraft and other aircraft unknown to the accepting unit/sector, unless otherwise agreed. Release for Turn An authorization for the accepting unit to turn (a) specific aircraft away from the current flight path by not more than 45 before the transfer of control. Note: The transferring unit/sector remains responsible within its Area of Responsibility for separation between the transferred aircraft and other aircraft unknown to the accepting unit/sector, unless otherwise agreed. 9

10 A.2 ATS Airspace Classification within Zagreb FIR 10

11 A.3 SEAFRA Index Chart Brindisi FIR and Zagreb FIR Border Description of symbols: E = entry point; X = exit; A = arrival; D = departure; I = intermediate 11