1   AIP and related amendment service

2   AIP Supplements (AIP SUP)

Temporary changes of long duration (three months and longer) and information of short duration consisting of extensive text and/or graphics, supplement the permanent information contained in the AIP and are published as AIP Supplements (AIP SUP). Operationally - significant temporary changes to the AIP are published in accordance with the AIRAC system and its established effective dates, and are identified clearly by the acronym AIRAC.

AIP Supplements, which are published between publications of two AIP AMDT, are distributed to subscribers e-mail address. Each AIP Supplement (regular or AIRAC) is allocated a serial number which is consecutive and based on the calendar year. The year, indicated by four digits is a part of the serial number of the SUP, e.g. AIP SUP NNN/YYYY; AIRAC AIP SUP NNN/YYYY.

The AIP Supplement is kept in the AIP as long as all or some of its content remains valid. The period of validity of information contained in the AIP Supplement will normally be given in the supplement itself. Alternatively, NOTAM may be used to indicate changes to the period of validity or cancellation of supplement.

The checklist of AIP Supplements shall be issued at intervals of not more than one month, as part of the checklist of NOTAM and also with distribution as for the AIP supplements.

3   Aeronautical Information Circulars (AIC)

The Aeronautical Information Circulars (AIC) contain information on the long-term forecast of any major change in legislation, regulations, procedures or facilities; information of a purely explanatory or advisory nature are liable to affect flight safety; and information or notification of an explanatory or advisory nature concerning technical, legislative or purely administrative matters. AICs are divided by subject and are issued in two series (A and B). AIC Series A contains information affecting international civil aviation and is given international distribution, while AIC Series B contains information affecting national aviation only and is given national distribution.

Each AIC is numbered consecutively within each series on a calendar-year basis. The year, indicated by four digits, is a part of the serial number of the AIC, e.g. AIC A NNN/YYYY; AIC B NNN/YYYY.

AICs, which are published between publications of two AIP AMDT, are distributed to subscribers by e-mail address.

A checklist of AIC currently in force shall be issued at least once a year, with distribution as for the AIC.

4   NOTAM and Pre–flight Information Bulletins (PIB)

NOTAM contains information on the establishment, conditions or changes of any aeronautical facility, service, procedure or hazard that could affect the safety of the flight. NOTAM serves to distribute urgent and unpredictable information of operational significance and, in general, of a temporary nature and short duration. NOTAM can also distribute permanent or temporary long duration information regarding operationally significant changes, when these are made at short notice due to time constraints for publishing an AIP AMDT or AIP SUP. Such NOTAM will be superseded, as soon as possible, by AIP AMDT or AIP SUP, as necessary.

NOTAM is transmitted by Aeronautical Fixed Service (AFS).

The text of each NOTAM contains the information in the order shown in the ICAO NOTAM Format, and is composed of the signification/uniform abbreviated phraseology assigned to the ICAO NOTAM Code, and complemented by ICAO abbreviation, indicators, designators, call signs, frequencies, figures and plain language. NOTAM is distributed in series which are identified by the letters A, B and S.

Series A contains information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations and which are of significance for international flights. NOTAM series A is available in English are distributed internationally.

Series B contains information affecting national aerodromes. NOTAM series B is available in English and are distributed internationally.

Series S (SNOWTAM) means a special series NOTAM given in a standard format, which provides a surface condition report notifying the presence or cessation of hazardous conditions due to snow, ice, slush, frost or water associated with snow, slush, ice, or frost on the movement area. SNOWTAM are prepared in accordance with PANS-AIM (Doc 10066) Appendix 4 by individual international aerodrome with separate numbering which starts from the beginning of the year, separately for each aerodrome and are distributed by the International NOTAM Office (NOF). Details are given in the Snow Plan in the Aerodrome Part (AD 1.2, 1.2.2 Section) and in Aeronautical Information Circular AIC series A published annually by the winter season.

Pre-flight Information Bulletins (PIB), which contain recapitulations of current NOTAM and other urgent information for the operator/flight crews, are available from the Vilnius ARO by e-mail.

Several types of PIB can be obtained:

• Aerodrome bulletin consists of information related to the aerodromes concerned;
• Area bulletin consists of information related to FIR and aerodromes;
• Route bulletin consists of information related to the aerodromes of departure, destination and over-flown FIRs and alternate aerodromes;
• Narrow Route bulletin consists of information related to a narrow path (the width of 20 NM or other on request) defined by route description and also aerodromes of departure, destination and alternate aerodromes.

PIB are available in English for IFR and VFR flights (NOTAM coverage).

The PIB can be obtained by e-mail, as well as picked up at the Vilnius ARO or printed out at the self-briefing terminal.

The PIB can be prepared independently using the Home Briefing module on the website www.ans.lt.

5   Checklists and Lists of valid NOTAM

A checklist of valid NOTAM is issued monthly via AFS. It contains the list of valid NOTAM and information about the valid AIP AMDTs, AIRAC AIP AMDTs, AIP SUPs and AICs.

6   Sales of publications

The above–mentioned publications can be obtained from the Aeronautical Information Service and from the company’s website www.ans.lt.

Subscription service and purchase prices are published in AIC Series A.