Serves as a central repository of commercial aviation safety information from specialized industry sources, analyses the information, based on advice provided by the Aviation Technical Advisory Group (ATAG) , and establishes a list of commercial air operators that are recommended for official travel of personnel within the UNSMS. CATSU also provides aviation safety information and advice regarding the air operators that are not on the recommended list and on donated flights upon request and as available. Real-time information is posted on the UNSMIN web page, which is accessible by UNDSS senior security professionals and Air Travel Safety Focal Points (ATSFPs) appointed by Agencies.