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Sonar

Sonar. Morgan Walsh. SO und  N avigation  A nd  R anging. A sonar is a relatively new technology that uses sound to navigate, communicate, and detect things on, or under the surface of water such as boats, or finding fish.

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Sonar

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  1. Sonar Morgan Walsh

  2. SOund Navigation And Ranging A sonar is a relatively new technology that uses sound to navigate, communicate, and detect things on, or under the surface of water such as boats, or finding fish.

  3. Originally, the idea of a sonar came about when studying animals such as bats, and dolphins who both use a similar technique for navigating and communication.

  4. active and passive Active sonar creates a pulse of sound, often called a "ping", and then listens for reflections of the pulse. The pulse may be at constant frequency or a chirp of changing frequency. Passive sonar's listen without transmitting. They are usually military. Passive sonar systems usually have large sonic databases.

  5. Canadian engineering The Canadian engineer Reginald Fessenden, while working for the Submarine Signal Company in Boston, built an experimental system beginning in 1912, a system later tested in Boston Harbor, and finally in 1914 from the U.S. Revenue Cutter Miami on the Grand Banksoff Newfoundland Canada

  6. uses Pipeline inspections Pipeline inspections too can now be performed by high frequency side scan sonar. Some oil and gas companies in the Danish and UK sectors of the North Sea require pipeline surveys using a two side scan sonar. These surveys look at spans, rock dump integrity and possible damage.

  7. Search and rescue missions Many side scan sonar systems are also used by search and rescue teams (or SAR). Together with a scanning sonar deployed on a tripod, they have proven to be an effective combined tool. Once the target of a body is located with the side scan sonar, the scanning sonar is used to guide the rescue diver to the site for recovering the body. 

  8. We will always need SONAR Sonar designs are continually developed and improved and their applications vary widely but the principals remain largely the same. People are always looking for new and innovated ways to find and use technology, and a Sonar can be developed to find new technologies, or new technologies can be used to develop more powerful sonar's.

  9. Pros Sonar is an active sensor, and is more likely to detect a submarine than a passive hydrophone . It also allows accurate determining of range to target based upon the time it takes between the sending of the ping and its return. 

  10. Cons Sonar’s sends out a distinct ping, which will alert the submarine that it is being hunted. Sonar’s have been linked to being harmful to marine life

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