Alerting Service (ALRS)

Alerting Service (ALRS) Alerting Service (ALRS) is provided to notify appropriate organisations regarding aircraft in need of search and rescue aid, and to assist such organisations during search and rescue as required.

The service is provided to:
  • all aircraft subject to air traffic control,
  • other aircraft that have filed a flight plan or are otherwise known to competent ATS units,
  • aircraft that are in threat of unlawful interference or subject to unlawful interference.
To avoid unnecesary alerting, it is extermely important for the pilot of an aircraft that has filed a flight plan, and takes off from an uncontrolled aerodrome or lands at an uncontrolled aerodrome, to properly submit a departure report to a competent ATS unit after take-off, and an arrival report after landing.

This service is provided by competent ATC units (TWR, APP  and ACC) and the Zagreb Flight Information Centre (Zagreb FIC) within their respective areas of responsibility.  The Zagreb Area Control Centre (Zagreb ACC) collects all necessary information on aircraft in need and forwards it to the central government authority responsible for search and rescue.

Alerting service is provided 24 hours daily 7 days a week within the Zagreb Flight Information Region (Zagreb FIR), as well as within other areas pursuant to valid international agreements.

Contact details of competent organizations that provide alerting and search and rescue services are published in AIP Croatia, GEN 3.6.1.