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A NavaidEquipment isUnderResponsibilityOf an OrganisationAuthority.
The Navaid class is also used to code landing systems (e.g. ILS, Localizer only, MLS). It will be comopsed of the corresponding instances of NavaidEquipment, e.g. Localizer, Glidepath, MarkerBeacon, DME, etc.). Finally, the Navaid and not its individual components aisInstalledAt a RunwayDirection.