2.1.1 Units of measurement
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The table of units of measurement shown below will be used by aeronautical stations within Jeddah FIR for air and ground operations.
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2.1.2 Temporal reference system
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Coordinated Universal Time (UTC) are used by Saudi air navigation service and in publications issued by the Aeronautical Information Management. Reporting of time is expressed to the nearest minute, e.g. 12:40:35 is reported as 1241.
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2.1.3 Horizontal reference system
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2.1.3.1 Name / designation of system
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All VORTACs, VOR/DMEs, Reporting Points, Prohibited Areas, Restricted Areas and Danger Areas are published in geographical coordinates indicating latitude and longitude expressed in terms of the World Geodetic System - 1984 (WGS-84) geodetic reference datum.
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Projection is expressed in terms of Universal Transverse Mercator (UTM).
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Ellipsoid is expressed in terms of the World Geodetic System - 1984 (WGS-84) ellipsoid.
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The World Geodetic System - 1984 (WGS - 84) is used.
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2.1.3.5 Area of application
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The area of application for the published geographical coordinates coincides with the area of responsibility of the Aeronautical Information Management, i.e. the entire territory of Saudi Arabia as well as the airspace over the high seas encompassed by the Jeddah FIR in accordance with the regional air navigation agreement.
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2.1.3.6
Use
Unit used
of an asterisks to identify
published
in
geographical
the
coordinates
publication
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Two asterisks (**) will be used to identify those coordinates that have not yet been transformed to WGS-84.
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For measurement of
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Units used
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Distance used in navigation, position reporting, etc. - generally in excess of 2 nautical miles
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Nautical Miles and tenths |
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Relatively short distances such as those relating to aerodromes (e.g. runway lengths)
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Meters |
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Altitudes, elevations and heights
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Feet |
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Horizontal speed including wind speed
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Knots |
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Vertical speed
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Feet per minute |
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Wind direction for landing and taking off
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Degrees Magnetic |
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Wind direction except for landing and taking off
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Degrees True |
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Visibility including runway visual range (RVR)
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Kilometers or meters |
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Altimeter setting
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Hectopascal |
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Temperature
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Degrees Celsius |
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Weight
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Metric ton or Kilogram |
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Time
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Hours and minutes, beginning at midnight UTC |
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2.1.4 Vertical reference system
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2.1.4.1 Name/ Designation of the reference system
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The vertical reference system corresponds to mean sea level (MSL).
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The geoid model used is the Earth Gravitational model 1996 - (EGM - 96).
For OEMA and OENN the EGM2008 is the Geoid Model used for determining elevations above MSL datum.
MSL based on EGM2008 is 1.13 M lower than MSL based on EGM96 at OEMA and MSL based on EGM2008 is 0.51 M higher than MSL based on EGM96 at OENN.
EGM2008 contains high resolution gravity field data and provides more accuracy than EGM96 model.
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2.1.5 Aircraft nationality and registration marks
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The nationality mark for aircraft registered in Saudi Arabia is the twoletter group HZ. The nationality mark is followed by a hyphen and a registration mark consisting of a combination of up to three letters or numbers, e.g. HZ - ABC.
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"Founding day" 22 February each year.
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"National day" 23 September each year.
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"Eid AlFitr" 25th Ramadan to 5th of Shawal.
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"Eid Al Adha " 5th to 15th Al Haj month.
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"Weekend" Friday and Saturday.
Note 1:
An AIC will be published at the begining of each Gregorian year showing the Eid Al Fitr and Al Adha converting to Gregorian dates.
Note 2:
Some administrative services may not be available and banks and other institutions may not be open during public holidays.
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