The following table of units of measurement will be used by aeronautical stations within YEREVAN FIR for air and ground operations.
| For measurement of | Units used |
|---|---|
| Distance used in navigation, position reporting | Kilometers |
| Relatively short distances such as those relating to aerodromes (e.g. runway lengths) | Meters |
| Altitudes, elevations and heights | Feet |
| Horizontal speed including wind speed | Kilometer per Hour, Meters per second |
| Vertical speed | 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 | Kilometers or Meters |
| Altimeter setting | Hg, Hectopascal, millibar |
| Temperature | Degrees Celsius |
| Weight | Metric tonnes or Kilograms |
| Time | Hours and minutes, beginning at midnight UTC |
All published geographical coordinates indicating latitude and longitude are expressed in terms of the World Geodetic System — 1984 (WGS-84) geodetic reference datum.
Area of application for the published geographical co-ordinates coincides with the area of responsibility of the Aeronautical Information Service, i.e. the entire territory of the Republic of Armenia as well as the airspace encompassed by the Yerevan 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 coordinates but whose accuracy of original field work does not meet the requirements in ICAO Annex 11, Chapter 2 and ICAO Annex 14, Volumes I and II, Chapter 2. Specifications for determination and reporting of WGS-84 coordinates are given in ICAO Annex 11, Chapter 2 and in ICAO Annex 14, Volumes I and II, Chapter 2.
The general nationality marks for aircraft registered in the Republic of Armenia are letters EK. The nationality mark is followed by a hyphen and a registration mark consisting of 5 Arabian figures, e.g., EK-85200. Each aircraft is appropriated own registration mark in case of its registration in the State Register of civil aircraft.
The General Department of Civil Aviation of the Republic of Armenia establishes rules of nationality and registration marks appropriation to aircraft.
| Name | Date/Day |
|---|---|
| New Year"s Day | 1-2 January |
| Christmas | January 6 |
| National Army Day | January 28 |
| International Women’s Day | March 8 |
| Genocide Memorial Day | April 24 |
| International Workers Solidarity Day | May 1 |
| Victory and Peace Day | May 9 |
| First Republic Day | May 28 |
| Constitution Day | July 5 |
| Independence Day | September 21 |
Note: Some administrative services may not be available and banks and other institutions may not be open on the following days.
| 31 December (New Year"s Eve) |