Professional users

Aeronautical publication services in Norway is executed by Avinor, and split between two departments:

- Aviation Services in Avinor AS, publishing AIP, AIP SUP and AIC
- AIS/NOTAM in Avinor Flysikring AS, providing integrated flight information and flight planning services for both civil and military flights.

Aeronautical information is promulgated through Integrated Aeronautical Information Package (IAIP), including Aeronautical Information Publication (AIP), AIP Supplement (AIP SUP) and Aeronautical Information Circular (AIC).

For supplementary information regarding publications and the related process, please see “Endring av AIP og AIRAC” as well as the following documents (only Norwegian versions of the documents are available):

• AIP Norge - Bestilling, produksjon og kunngjøring - Bestille endringer
• Vedlegg 1: Ansvarsmatrise for AIP Norge
• Vedlegg 2: Innmelding av banerapport (SNOWTAM-skjema)
• Vedlegg 3: Innmelding av godkjent bestiller

For further information, please contact AIS Kunngjøring at

AIRAC, Aeronautical Information Regulation and Control, is a system established by ICAO regulating the release of information pertinent to flight safety. This system consists of a set of common dates, timeline and procedures for publication of aeronautical data and information (see ICAO Annex 15 - Aeronautical Information Services (AIS)).

 Effectiv date - the date pubished changes take effect.

 Publication date - the latest date changes shall be made available for recepients.

 Planned AIP AMDT - An amendment to AIP Norway is planned published.

In short, information that shall be published according to AIRAC, shall be distributed by the AIS/AIM provider at least 42 days prior to effective date, with the purpose of reaching the recipients at least 28 days before the effective date. A publication date at least 56 days prior to the effective date shall be used if the planned changes are major and / or impact larger parts of the ATM system.

Avinor has a goal to publish AIRAC data and information  such that it can reach the recipients at least 42 days prior to the effective date. 

Time System and Daylight Saving Time/Standard Time

UTC - Universal Time Coordinated, former GMT - Greenwich Mean Time, and the Gregorian calendar are used by air navigation service and in publications issued by the Aeronautical Information Service. Time is rounded off to the nearest minute.

 Example: 12:40:29 is rounded off to 1240, 12:40:30 is rounded off to 1241.

Times stated in AIP, AIP SUP and AIC will always be UTC . In the AIP Norway, associated publications and AIS Portal, UTC times applicable during the summer period will be added between brackets.

Magnetic Variation

Magnetic variation (MAG VAR) is the constantly changing angle between the geographic north pole (True north) and the magnetic pole. Depending on whether the magnetic pole is east or west of the geographic pole the magnetic variation is described as east or west.

With easterly deviation, magnetic north is shown to the right of true north. To compensate, the magnetic deviation shall be subtracted.
With westerly deviation, magnetic north is shown to the left of true north. To compensate, the magnetic deviation shall be added.  

The rule of thumb is “Variation east - magnetic least,  variation west - magnetic best”.

The annual change in magnetic deviation is also calculated. This is achieved by estimating how far the magnetic pole will move during one year.
Magnetic variation is stated for each airport as well as on all charts, and the annual change is stated for each airport. These values are listed in AIP para AD 2.2-5.

In accordance with the recommendation prescribed in ICAO Annex 4, Avinor publish the magnetic variation values every fifth year. Said year is always a fraction of five; 2010, 2015, 2020 and so on.

Avinor use the IGRF model for automatic calculation of the magnetic variation. Said model is extracted from NOAA’s National Geophysical Data Center, ref www.ngdc.noaa.gov/geomag/models.shtml for further information.

  

Station declination

Station declination is the angular adjustment between the 0-radial on a VOR or TACAN and true north. The 0-radial is tried kept as close to magnetic north as possible. This has to be set manually for each separate station carefully considering  magnetic variation and annual change. The 0-radial will always be kept as close to magnetic north as practically possible. However, as the adjustment is carried out only every fifth year, the annual change will have to be accounted for in the set-up. Another factor to consider is that station declination is set to the nearest whole degree whilst magnetic variation is given in tenths of degrees. As a result station declination will be rounded off compared to magnetic variation.

 Example:

If the magnetic variation at a VOR stations position is 2,6°E and the declination is set to 3°E, the magnetic heading will be 002,6° when flying outbound on the 003 radial, giving a difference of 0,4°. If the annual change is 0,2°E, you can expect the difference to be almost zero two years later as the magnetic deviation has increased to 3,0°E.