Black Cat Systems has released DX Toolbox version 4.3.0, an update of the Mac OS X compatible radio propagation/conditions analysis and forecasting tool for amateur radio operators, shortwave listeners, and other radio enthusiasts.

This version adds the Ionosonde Plot Window. This window lets you see graphs of foF2, foES and hmF2 ionosonde data from a number of sites around the world. This data is useful in determining the current real time Maximum Usable Frequency (MUF) for shortwave radio propagation.

DX Toolbox sells for US$24.99. A feature complete demo is available at