# Maximum usable frequency

> highest radio frequency that can be used for skywave radio transmission

**Wikidata**: [Q1753030](https://www.wikidata.org/wiki/Q1753030)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Maximum_usable_frequency)  
**Source**: https://4ort.xyz/entity/maximum-usable-frequency


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. Freebase Data Dumps. 2013
3. National Library of Israel Names and Subjects Authority File