Signalling
The Art of Communication
http://www.shurdington.org/Downloads/The%20ART%20of%20COMMUNICATION.pdf
The Morse Code
http://en.wikipedia.org/wiki/Morse_code
Chart of Alphabets and Numbers in Morse Code
http://upload.wikimedia.org/wikipedia/commons/b/b5/International_Morse_Code.svg
Signalling with Flags
http://www.anbg.gov.au/flags/semaphore.html
International Maritime Signal Flags
http://en.wikipedia.org/wiki/International_maritime_signal_flags
International Code of Signals
http://en.wikipedia.org/wiki/International_Code_of_Signals
http://www.shurdington.org/Downloads/The%20ART%20of%20COMMUNICATION.pdf
The Morse Code
http://en.wikipedia.org/wiki/Morse_code
Chart of Alphabets and Numbers in Morse Code
http://upload.wikimedia.org/wikipedia/commons/b/b5/International_Morse_Code.svg
Signalling with Flags
http://www.anbg.gov.au/flags/semaphore.html
International Maritime Signal Flags
http://en.wikipedia.org/wiki/International_maritime_signal_flags
International Code of Signals
http://en.wikipedia.org/wiki/International_Code_of_Signals