CPV code 34964000 designates Doppler VHF Omni direction Range (DVOR) in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
34964000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 34960000 (Airport equipment).