| A notice distributed by means of telecommunication containing 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. |
| An acronym for a system aimed at advance notification based on common effective dates, of circumstances necessitating significant changes in operating procedures. |
| A publication issued by or with the authority of a state containing aeronautical information of a lasting character essential to air navigation. |
| A package which consists of the following elements: AIP, supplements to the AIP, NOTAM, AIC, checklists and summaries. |
EN 