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Thank you and yes, his post was full of great information.
We watched a documentary the other night and they were using Morse Code (forgive me as I can't remember the name of the movie now) but when I saw your post this morning I knew I had to highlight it today.

Hahaa , you'll have to get the name of that movie now lol....
Its a robust way of establishing communications in the harshest of conditions but is also a dying skill....