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<p>[QUOTE=&quot;baseball21, post: 6537941, member: 76863&quot;]There are parts of the ocean getting sonar mapped, it takes forever as they have to just go back and forth in grids to do it.&nbsp; It&#039;s certainly revealed a lot where it has been done, but as far as I know it hasnt been done much in the deep sea.&nbsp; It&#039;s one of the ways how they do the drain the sea shows that do show a bunch of sunken ships though usually they have idea what ship it is and you can&#039;t always get to what it can see.&nbsp; The big downfall is anything the sea floor has covered you won&#039;t know there&#039;s anything in the ground</p><p><br /></p><p>It&#039;s usually done in water that isn&#039;t too deep when theyre looking for a specific wreck and there&#039;s been quite a bit looking for flight 19 from WW2 where no one can figure out where those planes went down[/QUOTE]</p><p><br /></p>

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