Units of Measurement used in Air/Ground Communications, AIP and NOTAM are in accordance with the provisions of ICAO Annex 5.
Co-ordinated Universal Time (UTC) is used in the air traffic and communications services and in documents published by the Aeronautical Information Service unless otherwise specified. In reporting time the nearest full minute is used, e.g. 12HR. 40MIN. 40SEC is reported as 1241.
Daylight saving time commences on the last Sunday of March @0200 local and ends on the last Sunday of October @0200 local each year.
Summer: Local time minus 1HR = UTC
Winter: Local time = UTC
The geographical coordinates indicating Latitude and Longitude are expressed in terms of the World Geodetic Survey of 1984(WGS-84), geodetic reference datum Projection type Universal Transverse Mercator (UTM).
For aerodromes the geoid undulation for positions are published in AD 2.2.4 and in the AD 2.12 table.
The area of application for the published geographical coordinates coincides with the Area of Responsibility for IAA Air Traffic Services:
The Shannon Flight Information Region (FIR), the Shannon Upper Flight Information Region (UIR), the Shannon Oceanic Transition Area (SOTA) and the North Oceanic Transition Area (NOTA).
An asterisk will be used to identify those published WGS-84 coordinates which do not meet the requirements laid down in ICAO Annex 4 and ICAO Annex 15.
Ordnance Datum (Malin Head) is the source of Mean Sea Level heights in Ireland.
Heights connected to WGS-84 coordinates are Orthometric heights.
http://www.osi.ie/Services/GPS-Services/Reference-Information/Irish-Grid-Reference-System.aspx
An asterisk will be used to identify those published elevations/geoid undulations which do not meet the accuracy requirements laid down in ICAO Annex 4 and ICAO Annex 15.
The nationality mark for civil aircraft in the Republic of Ireland is the letter combination EI and EJ followed by a hyphen and a registration mark, consisting of three letters (from AAA to ZZZ incl.).
| Name | Date/Day |
|---|---|
| New Years Day | 1st January |
| February Holiday | 1st Monday of February |
| St. Patrick Day | 17th March |
| Easter Monday | Monday after Easter Sunday |
| May Holiday | 1st Monday of May |
| June Holiday | 1st Monday of June |
| August Holiday | 1st Monday of August |
| October Holiday | Last Monday of October |
| Christmas Day | 25th December |
| St. Stephens Day | 26th December |