Editing Radio navigation (section)

===Aeronautical===
[[File:EDDV-ILS 09R Glideslope.jpg|thumb|200px| [[Instrument landing system|ILS]]-antenna on [[Hannover Airport]] ]]
[[File:Deister-vdf.jpg|thumb|200px| VHF direction finder antenna of the ARNS on [[Deister]] nearby Hanover]]

'''Aeronautical radionavigation service''' (short: '''ARNS''') is – according to ''Article 1.46'' of the [[International Telecommunication Union|International Telecommunication Union's]] (ITU) [[ITU Radio Regulations|Radio Regulations]] (RR)<ref>ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.46, definition: ''aeronautical radionavigation service ''</ref> – defined as "''A radionavigation service intended for the benefit and for the safe operation of aircraft''."

This service is a so-called [[Safety service|safety-of-life service]], must be protected against [[Interference (communication)|interference]], and is an essential part of [[navigation]].