Human beings have always had a need for fast, accurate and reliable communication systems.Throughout history, there have been many attempts to find the fastest and most reliable method of getting a message from one place to another.Technology has been applied
to the problem to produce a whole range of solutions from telephones to
sonar.
In this module, you will explore the fascinating world of electronic communications and find out how submarines and aircraft find their way around.You will find out how TV pictures and telephone messages travel around the world at the speed of light.
