Home
Aeronautical Information Service (AIS)
The Aeronautical Information Service ensures the flow of information necessary for the safety, regularity and efficiency of international air navigation.
The role and importance of aeronautical information/data has been changed significantly with the implementation of RNAV, RNP and airborne computer-based navigation systems.
General
Each contracting state is required to provide an AIS or agree with one or more other contracting states to share service.
The AIS will be available 24 hours a day and where this is not provided, service shall be available during the whole period an aircraft is in flight in that area plus a period of at least 2 hours before and after it.
Aeronautical information is published in the form of an Integrated Aeronautical Information Package (IAIP).
Integrated Aeronautical Information Package consists of:
- AIP (including amendment service)
- Supplements to the AIP
- NOTAM and Pre-flight information bulletin (PIB)
- AIC
- Checklists & Summaries
Changes
1. Permanent
= Published as an AIP Amendment
2. Temporary
2.1 > 3 Months
= Published as an AIP Supplement
2.2 < 3 Months
= Published as a NOTAM
The Aeronautical Information Publication (AIP)
The AIP is required to be the definitive reference for permanent information and for information concerning long duration temporary changes.
The AIP consists of 3 parts;
- General (GEN)
- En-route (ENR)
- Aerodrome data (AD)
Aeronautical Information Regulation and Control procedures (AIRAC)
AIPs are kept up-to-date by regular revision on a fixed cycle. For operationally significant changes in information, the cycle known as the AIRAC is used. These changes are received well in advance (at least 42 days in advance).
It provides information on Rules of the Air, Air traffic services and Air navigation procedures. Basically, it's a means of amending operationally significant permanent information.
Aeronautical Information Circular (AIC)
An Aeronautical Information Circular (AIC) is a notice containing information that does not qualify for the origination of a NOTAM or for inclusion in the AIP, but which relates to flight safety, air navigation, technical, administrative or legislative matters.
Snowtam
Information concerning snow, ice and standing water on aerodrome pavement areas.
Runway Braking Action;
Good = value of 0.4 and above
Med/Good = value of 0.36 to 0.39
Med = value of 0.30 to 0.35
Med/Poor = value of 0.26 to 0.29
Poor = value of 0.25 and below
UNRELIABLE = reading unreliable
Runway Surface Description
Dry = Surface is dry
Damp = Surface shows a change of colour due to moisture
Wet = Surface is soaked but no significant patches of standing water are visible
Water Patches = Significant patches of standing water are visible
Flooded = Extensive standing water is visible
Ashtam
Information concerning an operationally significant change in volcanic activity, a volcanic eruption and/or volcanic ash clouds.
Colour codes;
RED = Eruption in progress. Ash cloud reported above FL250 or volcano dangerous, eruption likely with clouds expected to rise above FL250
ORANGE = Eruption in progress. Ash cloud not reaching FL250 or volcano dangerous, eruption likely with clouds not expected to rise above FL250
YELLOW = Volcano known to be active from time to time and activity has recently increased significantly. Not dangerous but caution should be exercised. Or after a volcanic eruption, volcanic activity has been decreased significantly.
GREEN = Volcano activity considered to have ceased and volcano reverted to its normal state
The Aeronautical Information Service ensures the flow of information necessary for the safety, regularity and efficiency of international air navigation.
The role and importance of aeronautical information/data has been changed significantly with the implementation of RNAV, RNP and airborne computer-based navigation systems.
General
Each contracting state is required to provide an AIS or agree with one or more other contracting states to share service.
The AIS will be available 24 hours a day and where this is not provided, service shall be available during the whole period an aircraft is in flight in that area plus a period of at least 2 hours before and after it.
Aeronautical information is published in the form of an Integrated Aeronautical Information Package (IAIP).
Integrated Aeronautical Information Package consists of:
- AIP (including amendment service)
- Supplements to the AIP
- NOTAM and Pre-flight information bulletin (PIB)
- AIC
- Checklists & Summaries
Changes
1. Permanent
= Published as an AIP Amendment
2. Temporary
2.1 > 3 Months
= Published as an AIP Supplement
2.2 < 3 Months
= Published as a NOTAM
The Aeronautical Information Publication (AIP)
The AIP is required to be the definitive reference for permanent information and for information concerning long duration temporary changes.
The AIP consists of 3 parts;
- General (GEN)
- En-route (ENR)
- Aerodrome data (AD)
Aeronautical Information Regulation and Control procedures (AIRAC)
AIPs are kept up-to-date by regular revision on a fixed cycle. For operationally significant changes in information, the cycle known as the AIRAC is used. These changes are received well in advance (at least 42 days in advance).
It provides information on Rules of the Air, Air traffic services and Air navigation procedures. Basically, it's a means of amending operationally significant permanent information.
Aeronautical Information Circular (AIC)
An Aeronautical Information Circular (AIC) is a notice containing information that does not qualify for the origination of a NOTAM or for inclusion in the AIP, but which relates to flight safety, air navigation, technical, administrative or legislative matters.
Snowtam
Information concerning snow, ice and standing water on aerodrome pavement areas.
Runway Braking Action;
Good = value of 0.4 and above
Med/Good = value of 0.36 to 0.39
Med = value of 0.30 to 0.35
Med/Poor = value of 0.26 to 0.29
Poor = value of 0.25 and below
UNRELIABLE = reading unreliable
Runway Surface Description
Dry = Surface is dry
Damp = Surface shows a change of colour due to moisture
Wet = Surface is soaked but no significant patches of standing water are visible
Water Patches = Significant patches of standing water are visible
Flooded = Extensive standing water is visible
Ashtam
Information concerning an operationally significant change in volcanic activity, a volcanic eruption and/or volcanic ash clouds.
Colour codes;
RED = Eruption in progress. Ash cloud reported above FL250 or volcano dangerous, eruption likely with clouds expected to rise above FL250
ORANGE = Eruption in progress. Ash cloud not reaching FL250 or volcano dangerous, eruption likely with clouds not expected to rise above FL250
YELLOW = Volcano known to be active from time to time and activity has recently increased significantly. Not dangerous but caution should be exercised. Or after a volcanic eruption, volcanic activity has been decreased significantly.
GREEN = Volcano activity considered to have ceased and volcano reverted to its normal state
