# Sonne

> A long range radio navigation system for aircraft used 1930s-1991

**Wikidata**: [Q1127444](https://www.wikidata.org/wiki/Q1127444)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sonne_(navigation))  
**Source**: https://4ort.xyz/entity/sonne-q1127444


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)