Changes

# notify appropriate organizations regarding aircraft in need of search and rescue aid, and assist such organizations as required.

a. Area control service for objectives 1 & 3.

c. Aerodrome control service for objectives 1, 2 & 3.

The air traffic control (ATC) service is established to accomplish the first three objectives. While the first and third are universally applicable to all ATC units, the second one is only relevant to aerodrome control units. The fourth objective is covered by the flight information service (FIS) and the last one is the subject of the alerting service.