| With such amazing developments in the technological | | | | originally when mobile, or cell phones were first |
| world especially with the more recent development of | | | | developed they also made use of FM signals, although |
| the Internet, radio can often be thought of as a bit old | | | | this has now changed. |
| fashioned. | | | | It's also interesting to note that radio is still playing a |
| Of course this is not the case and the use and | | | | major role in the maritime sector and not just in the |
| progression of radio itself is still continuing at a very | | | | maritime sector but for navigation in every sector, with |
| fast pace. | | | | the use of satellite systems. |
| One of the earliest adoptions of radio was it's use in | | | | RADAR is also based on radio waves, although most |
| the maritime industry. Telegraphic messages are still | | | | of the new systems that are produced are digital |
| used today to send messages between ships and the | | | | ones. Basically radio waves are bounced off different |
| land, as well as themselves. | | | | objects. The position of these objects are then |
| The word radio itself for many conjures up images of | | | | determined by the amount of time it takes the |
| the 'wireless'. It's still in use today, but with less | | | | reflection. The process can also be used to determine |
| popularity than in it's heyday, with all the other forms of | | | | the direction and the type of surface of the object. |
| media that are now so prevalent. Originally all | | | | Radio is also used in others areas that many people |
| broadcasts came via and AM. AM is Amplitude | | | | might not think of. Examples of this would be in |
| modulation. Later broadcasts developed into FM which | | | | surgery where people can find radio being used to |
| had a higher level of fidelity and was not susceptible to | | | | seal blood vessels using diathermy equipment. It's also |
| the same levels of static, or interference. | | | | used to heat up food and drinks in a microwave oven. |
| Television pictures come from an AM signal and | | | | |