ENR 1.4  ATS airspace classification and description

1   Introduction

Within the LJUBLJANA FIR the airspace is divided into four Classes C, D, E and G, which equate broadly with those recommended by SERA.6001.
Classes A, B and F are at the present not used.
The airspace classes are described below with respect to the conditions of use and the services provided within.
Abbreviations used in this context have the following meaning:
The vertical and lateral limits of the airspace are contained in chapter ENR 2.1, for CTRs see LJLJ AD 2.17, LJMB AD 2.17, LJPZ AD 2.17, LJCE AD 2.17

2   Classification of airspaces - SERA.6001

ATS airspace is classified and designated in accordance with the following:
2.1   CLASS C
IFR and VFR flights are permitted. All flights are provided with air traffic control service and IFR flights are separated from other IFR flights and from VFR flights. VFR flights are separated from IFR flights and receive traffic information in respect of other VFR flights and traffic avoidance advice on request. Continuous air-ground voice communications are required for all flights. For VFR flights a speed limitation of 250 kt indicated airspeed (IAS) applies below 3050 m (10000 ft) AMSL, except where approved by the competent authority for aircraft types, which for technical or safety reasons, cannot maintain this speed. All flights shall be subject to ATC clearance.
2.2   CLASS D
IFR and VFR flights are permitted and all flights are provided with air traffic control service. IFR flights are separated from other IFR flights, receive traffic information in respect of VFR flights and traffic avoidance advice on request. VFR flights receive traffic information in respect of all other flights and traffic avoidance advice on request. Continuous air-ground voice communications are required for all flights and a speed limitation of 250 kt IAS applies to all flights below 3050 m (10000 ft) AMSL, except where approved by the competent authority for aircraft types, which for technical or safety reasons, cannot maintain this speed. All flights shall be subject to ATC clearance.
2.3   CLASS E
IFR and VFR flights are permitted. IFR flights are provided with air traffic control service and are separated from other IFR flights. All flights receive traffic information, as far as is practical. Continuous air-ground voice communications are required for IFR flights. A speed limitation of 250 kt IAS applies to all flights below 3050 m (10000 ft) AMSL, except where approved by the competent authority for aircraft types, which for technical or safety reasons, cannot maintain this speed. All IFR flights shall be subject to ATC clearance. Class E shall not be used for control zones.
2.4   CLASS G
IFR and VFR flights are permitted and receive flight information service if requested. All IFR flights shall be capable of establishing air-ground voice communications. A speed limitation of 250 kt IAS applies to all flights below 3050 m (10000 ft) AMSL, except where approved by the competent authority for aircraft types, which for technical or safety reasons, cannot maintain this speed. ATC clearance is not required.

3   CLASS C - Controlled airspace

The provisions of Class C are shown below:
ClassType of flightSeparation providedService providedSpeed limitation (*)Radio communication capability requirementContinuous two way air-ground voice communication requiredSubject to an ATC clearance
CIFRIFR from IFR
IFR from VFR
Air traffic control serviceNot applicableYesYesYes
VFRVFR from IFR(1) Air traffic control service for separation from IFR
(2) Air traffic control service, VFR/VFR traffic information(and traffic avoidance advice on request)
250 kt IAS below 3050 m (10000 ft) AMSLYesYesYes
(*) When the level of the transition altitude is lower than 3050 m (10000 ft) AMSL, FL 100 should be used in lieu of 10000 ft. On request the competent authority may also exempt aircraft types, which for technical or safety reasons, cannot maintain this speed.
3.1   Class C airspace comprises:
NAMETYPELOWER LIMITUPPER LIMIT
LJUBLJANACTA (Control Area-Upper)FL 245FL 660
DOLSKO 1TMA (Terminal Control Area)FL 195FL 245
DOLSKO 2TMA (Terminal Control Area)FL 195FL 245
LJUBLJANA 1TMA (Terminal Control Area)1000 ft GNDFL 125
LJUBLJANA 2TMA (Terminal Control Area)9500 ft MSLFL 125
LJUBLJANA 3TMA (Terminal Control Area)5500 ft MSLFL 125
LJUBLJANA 4TMA (Terminal Control Area)4500 ft MSLFL 125
MURATMA (Terminal Control Area)FL 195FL 245

4   CLASS D - Controlled airspace

The provisions of Class D are shown below:
ClassType of flightSeparation providedService providedSpeed limitation (*)Radio communication capability requirementContinuous two way air-ground voice communication requiredSubject to an ATC clearance
DIFRIFR from IFRAir traffic control service, traffic information about VFR flights
(and traffic avoidance advice on request)
250 kt IAS below 3050 m (10000 ft) AMSLYesYesYes
VFRNilAir traffic control service, IFR/VFR and VFR/VFR traffic information
(and traffic avoidance advice on request)
250 kt IAS below 3050 m (10000 ft) AMSLYesYesYes
(*) When the level of the transition altitude is lower than 3050 m (10000 ft) AMSL, FL 100 should be used in lieu of 10000 ft. On request the competent authority may also exempt aircraft types, which for technical or safety reasons, cannot maintain this speed.
4.1   Class D airspace comprises:
NAMETYPELOWER LIMITUPPER LIMIT
DOLSKO 1TMA (Terminal Control Area)7500 ft MSLFL 195
DOLSKO 2TMA (Terminal Control Area)9500 ft MSLFL 195
MARIBOR 1TMA (Terminal Control Area)2500 ft MSLFL 125
MARIBOR 2TMA (Terminal Control Area)3500 ft MSLFL 125
MURATMA (Terminal Control Area)7500 ft MSLFL 195
PORTOROZTMA (Terminal Control Area)1000 ft GNDFL 135
CERKLJE 1TMA (Terminal Control Area)1000 ft GND7500 ft MSL
CERKLJE 2TMA (Terminal Control Area)4500 ft MSL7500 ft MSL
CERKLJE 3TMA (Terminal Control Area)4500 ft MSL7500 ft MSL
CERKLJE 4TMA (Terminal Control Area)5500 ft MSL7500 ft MSL
CERKLJE 5TMA (Terminal Control Area)5500 ft MSL7500 ft MSL
CERKLJE 6TMA (Terminal Control Area)6500 ft MSL7500 ft MSL
CERKLJE 7TMA (Terminal Control Area)6500 ft MSL7500 ft MSL
CERKLJECTR (Control Zone)GND503100 ft MSL
LJUBLJANACTR (Control Zone)GND4000 ft MSL
MARIBORCTR (Control Zone)GND3500 ft MSL
PORTOROZCTR (Control Zone)GND4000 ft MSL

5   CLASS E - Controlled airspace

The provisions of Class E are shown below:
ClassType of flightSeparation providedService providedSpeed limitation (*)Radio communication capability requirementContinuous two way air-ground voice communication requiredSubject to an ATC clearance
EIFRIFR from IFRAir traffic control service and, as far as practical, traffic information about VFR flights250 kt IAS below 3050 m (10000 ft) AMSLYesYesYes
VFRNilTraffic information as far as practical250 kt IAS below 3050 m (10000 ft) AMSLNo (**)No (**)No
(*) When the level of the transition altitude is lower than 3050 m (10000 ft) AMSL, FL 100 should be used in lieu of 10000 ft. On request the competent authority may also exempt aircraft types, which for technical or safety reasons, cannot maintain this speed.
(**) Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, on the appropriate communication channel in RMZ.
5.1   Class E airspace comprises:
NAMETYPELOWER LIMITUPPER LIMIT
DOLSKO 1TMA (Terminal Control Area)2500 ft GND7500 ft MSL
MARIBOR 2TMA (Terminal Control Area)1000 ft GND3500 ft MSL
MURATMA (Terminal Control Area)2500 ft GND7500 ft MSL
MURA 2CTA (Control Area)2500 ft GND7500 ft MSL

6   CLASS G - Airspace

The provisions of Class G are shown below:
ClassType of flightSeparation providedService providedSpeed limitation (*)Radio communication capability requirementContinuous two way air-ground voice communication requiredSubject to an ATC clearance
GIFRNilFlight information service if requested250 kt IAS below 3050 m (10000 ft) AMSLYes(**)No (**)No
VFRNilFlight information service if requested250 kt IAS below 3050 m (10000 ft) AMSLNo (**)No (**)No
(*) When the level of the transition altitude is lower than 3050 m (10000 ft) AMSL, FL 100 should be used in lieu of 10000 ft. On request the competent authority may also exempt aircraft types, which for technical or safety reasons, cannot maintain this speed.
(**) Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, on the appropriate communication channel in RMZ.
6.1   Class G airspace comprises:
LOWER LIMITUPPER LIMIT
All airspace below TMA DOLSKO 1, CTA MURA 2, TMA MARIBOR 1 and TMA MURAGND2500 ft GND
All airspace below TMA DOLSKO 2 and TMA LJUBLJANA 2GND9500 ft MSL
All airspace below TMA LJUBLJANA 1, TMA MARIBOR 2 and TMA PORTOROZGND1000 ft GND
All airspace below TMA LJUBLJANA 3GND5500 ft MSL
All airspace below TMA LJUBLJANA 4GND4500 ft MSL

7   Regulations for VFR flights in class C and D airspace

7.1   Clearances
7.1.1  Clearances are required to enable ATS units to provide the prescribed services, especially:
  1. within Class C airspace
    • separation from IFR flights
    • issue traffic information about other VFR flights, including traffic avoidance advice (on request)
  2. within Class D airspace
    • issue traffic information about all other flights, including traffic avoidance advice (on request)
7.1.2  If a pilot is unable to comply with a clearance because of weather conditions or other reasons, he shall request an alternate clearance in due time.
7.1.3  Upon clearance request the following flight data shall be transmitted:
  • aircraft call sign
  • type of aircraft
  • intended route and level
  • transponder
7.2   Communication procedure
7.2.1  Continuous two-way communication must be maintained
7.2.2  Communication failure
  1. If communication failure occurs when outside of airspace Class C and D, entry shall NOT be done, even if an entry clearance has already been received.
  2. If communication failure occurs when the aircraft is already within the airspace, the flight shall be continued in accordance with clearance received. Code A 7600 shall be selected when practicable.
  3. For flights within CTRs and TMAs as published in LJLJ AD 2.22, LJMB AD 2.22, LJPZ AD 2.22 the respective regulations of these procedures apply. A VFR flight requesting to enter a CTR and experiencing communication failure, shall divert to an uncontrolled aerodrome, if no serious reasons make this infeasible. If a diversion is not possible, the pilot-in-command shall observe the procedures published in LJLJ AD 2.22, LJMB AD 2.22, LJPZ AD 2.22
7.2.3  Since entry clearances will often be based on the immediate availability of a transponder, SSR transponders shall be switched to STAND-BY in due course.