ICAO - 10150 CORR 1
Manual on the Functional Specifications for the Location of an Aircraft in Distress Repository (LADR)
|Publication Date:||21 June 2021|
The scope of this document is to provide details on a solution to meet the requirement of making the last known position of an aircraft in distress situation available to stakeholders in a timely manner while applying a global standard.
The proposed Location of an Aircraft in Distress Repository (LADR) is intended to serve as a central location for storing and accessing the last known position of an aircraft in distress. This position may be made available from a number of different proprietary systems which meet the requirements of the Standards in Annex 6. The LADR will provide a single point of access and standard format for this information. Additional functionality, for example the issuing of a notification to accredited users of the arrival of new data, may also be included but are not considered fundamental to the basic function of the LADR.
The LADR does not provide the alerting of distress conditions; this will be done by operators and air traffic services units (ATSUs) using the existing provisions of Annex 6 and Annex 11 - Air Traffic Services. Annex 6 requires the operator to be notified when an aircraft is in distress. The operator should use this information to supplement its existing procedures and either validate the distress event, or establish contact with the crew to confirm the safety of the aeroplane. In the event that a distress condition is confirmed or suspected, the operator will contact the relevant air traffic control (ATC) centre who remains responsible for the activation of the alerting service and establishment of the relevant alert phase (uncertainty (INCERFA), alert (ALERFA), distress (DETRESFA)).
In due course, the LADR may host or serve as a system-wide information management (SWIM)-based conduit for additional information that may be of use to search and rescue (SAR). This specification identifies the minimum dataset required to make the location of an aircraft in a distress condition (aircraft identification details, latitude, longitude and time) available to air traffic services units (ATSUs), rescue coordination centres (RCCs) and others as established by the State of the Operator. Additional elements which may be optionally provided by an autonomous distress tracking (ADT) device are also defined in order to ensure the information is received in a standardized format.
The initial implementation of the LADR is limited to position data from an activated ADT device caused by the aircraft reporting a distress condition or being manually activated by the flight crew. This should not be confused with an aircraft being designated as in a distress phase by air traffic control (ATC), as described in Annex 11, Chapter 5 (Alerting service).
The LADR system will allow accredited contributors to submit position information of an aircraft in distress or potentially in distress (1.4 refers). The system will store information (i.e. data that meets the input format guidelines) and provide filters allowing users to access information based on their profile.