Radio signal's spread depends on it's frequency. Higher the frequency, more accurate the wave gets. Lower the frequency, the wave gets spread across. However, if you try to increase the accuracy by making the frequency higher, it sometimes goes too far away due to Earth's curvature. Play around with obstacles, radio transmitter's height, and frequency in this simulator!
Scripts all done by me. Please credit when used. Radio music - Godzilla (1954) main theme by Akira Ifukube