Aviation authorities

National

• Department of Aviation, Ministry of Transport www.sam.gov.lv/sam.nsf/Departamenti/ AviacijasDepartaments

• Civil Aviation Agency of Latvia (LCAA)
  www.caa.lv

International

• International Civil aviation organiation (ICAO)
  www.icao.int

• European Civil Aviation conference (ECAC)
  www.ecac-ceac.org

• European Organisation for the Safety of Air Navigation (EUROCONTROL)
  www.eurocontrol.int

International organisations

• Civil Air Navigation Services Organisation (CANSO)
  www.canso.org

• International Air Transport Association
  www.iata.org

• International Federation of Air Traffic Controllers` Associations (IFATCA)
  www.ifatca.org 

Equipment manufacturers:

• ARINC www.arinc.com

• Si ATM http://www.siatm.com

• Rohde & Schwarz www.rsd.de

• Frequentis www.frequentis.com

• Alenia www.aleniamarconisystems.com

• Fernau www.fernau.com

• Alcatel www.alcatel.com