I thought I'd better draw your attention to this as it is listed under 'Gauges'.
This is the file description:
A bona fide Radio Range System simulating a robust navigation technique of the 1940s which lasted until the advent of the VOR. Uses Morse Code A and N audio signals to determine course. Nearly a year in development, this package includes a standalone DC-3 (based on the default) with three panels, new gauges and greatly improved flight dynamics; scenery for 118 Radio Range stations of Eastern US and SE Canada (from 1944 sectional charts) with approach plates for each; and a comprehensive instruction manual. All necessary system, program and sound files are included. Future enhancements will add Western US and Canadian stations.
BTW it comes with its own .exe for those who don't like installing manually
i saw that. it all sounds good - but being the modern man that i am...what does it all mean?! how does it work?
The four-course radio range description.