When in flight, having practiced with the 'Morse Cracker' will help you I.D those NDB's easily! This interactive CD makes learning this useful code easier to master. Includes three learning functions. A 'text to code' option which allows you to enter a letter of the alphabet and the computer produces the morse conversion, both visually and audibly. A 'Mouse Key' option allows your actual keying accuracy to be assessed, and there is a random test with "reveal" window to check learning progress. For use on your PC, just load the CD ROM and it will auto run.