More Sonar websites:
For more help with Sonar info, type in "history of Sonar" in the search bar.
Also, go to www.about.com/historyofsonar and wikipedia (I might have the first website"s address wrong, but just go with what I put).
Also, go to www.about.com/historyofsonar and wikipedia (I might have the first website"s address wrong, but just go with what I put).
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