The use of mirrors to reflect the sun has been used from ancient times but on an ad hoc basis with no specific signalling instrument devised. Codes used were clumsy, temporary and mostly forgotten. Charles Babbage, of computer fame, wasanbsp;...
|Title||:||Radiotelegraph & Radiotelephone Codes, Prowords and Abbreviations|
|Author||:||John W Alcorn VK2JWA|
|Publisher||:||Lulu.com - 1997|