Radio Beacons and Stations

[Krt_Bong]

How do you tune into the Radio BBC, Honolulu etc.. I have files in the proper folders and the keys mapped in the controls I just can't figure out how I'm supposed to tune into them? The missions provided at least for the B-25 uses the blind landing system which is great but I didn't see anything on using the radio stations.

Edit- Oops I found it, Realistic Navigation has to be enabled in the Difficulty Settings - really cool!