What is one way to determine if the maximum usable frequency (MUF) is high enough to support 28 MHz propagation between your station and western Europe?

The 28 MHz amateur radio band is widely known as the 10-metre band (since 300 divided by 28 MHz is approximately 10.7 metres). The best practical way to find out if the ionosphere will support propagation on a specific band to a specific region is to listen for signals originating from there on that exact band. Amateur radio beacon stations transmit continuously or at regular intervals specifically to help operators gauge propagation conditions. Listening to a 10-metre beacon from western Europe directly confirms the path is open. Listening to WWVH on 15 MHz or checking 20-metre stations only reveals conditions for those lower frequencies, which cannot guarantee that 28 MHz is open.