The following table of units of measurement will be used by aeronautical stations within Vilnius FIR for air and ground operations.
| FOR MEASUREMENT OF | UNITS USED |
| Distance used in navigation, position reporting, etc. generally in excess of 2 nautical miles | Nautical Miles and tenths |
| Relatively short distances such as those relating to aerodromes (e.g. runway lengths) | Metres |
| Altitudes, elevations and heights | Feet |
| Horizontal speed including wind speed | Knots |
| Vertical rate | Feet per minute |
| Wind direction for landing and taking off | Degrees Magnetic |
| Wind direction except for landing and taking off | Degrees True |
| Visibility including runway visual range | Kilometres or Metres |
| Altimeter setting | Hectopascal |
| Temperature | Degrees Centigrade |
| Weight | Metric tons or Kilogrammes |
| Time | Hours and Minutes, the day of 24 hours beginning at midnight UTC |
General
Coordinated Universal Time (UTC) and the Gregorian calendar are used by navigation services and in publications issued by the Aeronautical Information Service.
Reporting of time, is expressed to the nearest minute, e.g. 12:40:35 is reported 1241.
In the AIP and associated publications the expression “summer period” will indicate that part of the year in which the “daylight saving time” is in force. The other part of the year will be named the “winter period”.
The “summer period” in Lithuania will be introduced every year on the last Sunday in March at 0100 UTC and it will cease on the last Sunday in October at 0100 UTC.Times applicable during the “summer period” are given in brackets. Local time is:
All published geographical coordinates indicating latitude and longitude are expressed in terms of the World Geodetic System - 1984 (WGS-84-84) geodetic reference datum.
Projection is expressed in term of Universal Transverse Mercator (UTM).
Ellipsoid is expressed in terms of the World Geodetic System – 1984 (WGS-84) ellipsoid.
The World Geodetic System – 1984 (WGS-84) is used.
The area of application for the published geographical coordinates coincides with the area of responsibility of the Aeronautical Information Service, i.e. the entire territory of the Republic of Lithuania as well as the airspace over the high sea encompassed by the Vilnius Flight Information Region in accordance with the regional air navigation agreement.
An asterisk (*) will be used to identify those published geographical coordinates which have been transformed into WGS-84-84 coordinates but whose accuracy of original field work does not meet the accuracy requirements in ICAO Annex 11, Chapter 2 and ICAO Annex 14, Volumes I and II, Chapter 2.
The vertical reference system corresponds to mean sea level (MSL).
The geoid model used is the Earth Gravitational Model 1996 - (EGM-96).
The nationality mark for aircraft registered in the Republic of Lithuania are the letters LY.The nationality mark is followed by a hyphen and a registration mark consisting of 3 letters, e.g. LY-ABC.
| Name | 2024 | 2025 | 2026 | |
| New Year’s Day | 01 JAN | 01 JAN | 01 JAN | |
| Independence Day | 16 FEB | 16 FEB | 16 FEB | |
| Re-establishment of the State | 11 MAR | 11 MAR | 11 MAR | |
| Easter | 31 MAR, 1 APR | 20, 21 APR | 05, 06 APR | |
| International Labour Day | 01 MAY | 01 MAY | 01 MAY | |
| Mother’s Day | 05 MAY | 04 MAY | 03 MAY | |
| Father’s Day | 02 JUN | 01 JUN | 07 JUN | |
| Midsummer Day | 24 JUN | 24 JUN | 24 JUN | |
| Day of Statehood | 06 JUL | 06 JUL | 06 JUL | |
| Assumption Day | 15 AUG | 15 AUG | 15 AUG | |
| All Saint's Day | 01, 02 NOV | 01, 02 NOV | 01, 02 NOV | |
| Christmas Eve | 24 DEC | 24 DEC | 24 DEC | |
| Christmas Days | 25, 26 DEC | 25, 26 DEC | 25, 26 DEC |