Gives details of a known path that is open via Es (eg from the cluster, off-air Band II, etc), and MUF.EXE will calculate the critical frequency (Fcrit), the Maximum Usable Frequency (MUF), and the Frequency of Optimum Traffic (FOT) in the E layer. The programme will also give a hint as to where you should beam and into which region you might make contacts. The calculations are based on information accumulated over a number of years, and seem to represent single-skip Es quite well (however, no guarantee of accurancy is given
