AIP for Lithuania (section ENR-1.4) valid from 29 OCT 2026

ENR 1.4 ATS AIRSPACE CLASSIFICATION AND DESCRIPTION

ENR 1.4.1 ATS AIRSPACE CLASSIFICATION (see ENR 6.13)

ATS airspace is designated in accordance with the following airspace classification:

Class A: IFR flights only are permitted. All flights are provided with air traffic control service and are separated from each other. Continuous air-ground voice communications are required for all flights. All flights are subject to ATC clearance.

Class B: IFR and VFR flights are permitted. All flights are provided with air traffic control service and are separated from each other. Continuous air-ground voice communications are required for all flights. All flights are subject to ATC clearance.

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 and a speed limitation of 250 KT IAS applies to all flights below FL 100. All flights are subject to ATC clearance.

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. Speed limitation of 250 KT IAS applies to VFR flights below FL 100. All flights are subject to ATC clearance.

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 FL 100. All IFR flights are subject to ATC clearance.

Class F: IFR and VFR flights are permitted. All participating IFR flights receive an air traffic advisory service and all flights receive flight information service if requested. Continuous air-ground voice communications are required for IFR flights participating in the advisory service and all IFR flights shall be capable of establishing air-ground voice communication. A speed limitation of 250 KT IAS applies to all flights below FL 100. ATC clearance is not required.

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 communication. A speed limitation of 250 KT IAS applies to all flights below FL 100. ATC clearance is not required.

Aerodrome Traffic Zones (ATZ) are classified as Radio Mandatory Zones (RMZ) in which the requirements of point (a) of SERA.6005 of the Annex to Regulation (EU) No 923/2012 apply. Flight crew operating in other parts of uncontrolled Class G airspace shall maintain a continuous listening watch on the flight information service frequency for voice communications in order to ensure receipt of notifications on the planned activation of restricted area(s) as specified in Article 181 (5) of the Law on Aviation, and shall establish radio communication when necessary.

ENR 1.4.2 ATS AIRSPACE DESCRIPTION

Class	Type of flight	Separation provided	Service provided	Speed limitation	Radio communication capability requirement	Continuous two-way air-ground voice communication required	Subject to an ATC clearance
A1)	IFR only	All aircraft	Air traffic control service	Not applicable	Yes	Yes	Yes
B1)	IFR	All aircraft	Air traffic control service	Not applicable	Yes	Yes	Yes
B1)	VFR	All aircraft	Air traffic control service	Not applicable	Yes	Yes	Yes
C	IFR	IFR from IFR IFR from VFR	Air traffic control service	Not applicable	Yes	Yes	Yes
C	VFR	VFR from IFR	1) Air traffic control service for separation from IFR; 2) VFR/VFR traffic information (and, traffic avoidance advice on request)	250 KT2) IAS below FL100	Yes	Yes	Yes
D	IFR	IFR from IFR	Air traffic control service, traffic information about VFR flights (and traffic avoidance advice on request)	250 KT2) IAS below FL100	Yes	Yes	Yes
D	VFR	NIL	IFR/VFR and VFR/VFR traffic information (and traffic avoidance advice on request)	250 KT2) IAS below FL100	Yes	Yes	Yes
E1)	IFR	IFR from IFR	Air traffic control service and, as far as practical, traffic information about VFR flights	250 KT IAS below FL100	Yes	Yes	Yes
E1)	VFR	NIL	Traffic information as far as practical	250 KT IAS below FL100	No	No	No
F1)	IFR	IFR from IFR as far as practical	Air traffic advisory service; on request flight information service	250 KT IAS below FL100	Yes	No	No
F1)	VFR	NIL	Flight information service on request	250 KT IAS below FL100	No3)	No3)	No
G	IFR	NIL	Flight information service on request	250 KT2) IAS below FL100	Yes3)	No3)	No
G	VFR	NIL	Flight information service on request	250 KT2) IAS below FL100	Yes3)	No3)	No

Classes A, B, E and F are not used in Vilnius FIR.
A speed limitation of 250 KT IAS below FL 100, as specified in SERA.6001 of Commission Implementing Regulation (EU) No 923/2012, is not applied to NATO state aircraft conducting airspace surveillance, control and defense functions as well as the related training flights. This exemption is not applied to military aircraft operating on ATS routes, where IAS speed limit is established depending on the aircraft category.
Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, on the appropriate communication channel in RMZ.