tag:blogger.com,1999:blog-42905541182411925362024-02-20T01:39:07.653-08:00CusstomizerNicolas Cusseauhttp://www.blogger.com/profile/09668083353752917843noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4290554118241192536.post-68625035518947711842015-05-16T13:02:00.000-07:002015-05-16T13:03:48.351-07:00Ocean Business 2015On 14-16 April 2015 was held the conference Ocean Business 2015 (<a href="http://www.oceanbusiness.com/">http://www.oceanbusiness.com/</a>).<br />
I think it is a very good opportunity to reactivate this blog about underwater instruments as there was a lot of new products exhibited.<br />
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Let's begin with a first one very interesting: SonarBell developed by <a href="http://www.cesalt.co.uk/">SALT</a> (Subsea Asset Location Technologies Ltd). SonarBell is the underwater acoustics equivalent of the Luneberg lenses used in radar.Nicolas Cusseauhttp://www.blogger.com/profile/09668083353752917843noreply@blogger.com0tag:blogger.com,1999:blog-4290554118241192536.post-39723373345757782552013-09-08T11:05:00.001-07:002013-09-08T11:05:28.265-07:00Bottoming IIIf you want to dig in mechanical considerations for bottoming, here is the link to a good paper:<br />
https://www.researchgate.net/publication/235609338_Bottoming_of_a_submarineNicolas Cusseauhttp://www.blogger.com/profile/09668083353752917843noreply@blogger.com0tag:blogger.com,1999:blog-4290554118241192536.post-81360479709912586332013-09-08T09:16:00.000-07:002013-09-08T11:02:10.335-07:00BottomingFor the first article, let's speak about an interesting capability that a new submarine could develop: bottoming.<br />
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The primary capabilities to assert in the design of a new submarine are the submarine depth ratings.<br />
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There are four depths to take into account:<br />
<ol>
<li>Design depth is the nominal depth listed in the submarine's
specifications. </li>
<li>Test depth is the maximum depth at which a
submarine is permitted to operate under normal peacetime circumstances,
and is tested during sea trials.</li>
<li>Never-exceed depth is the maximum depth at which a submarine is allowed to operate.</li>
<li>Collapse depth is the submerged depth at which a submarine's hull will collapse due to
pressure. </li>
</ol>
These depths were useful in the context of deep water submarine warfare (blue-water navy).<br />
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However, looking at he recent geopolitical tensions, the submarine warfare is moving to coastal zones and estuaries. Submarines are becoming part of the green-water navy.<br />
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A new and interesting capability to develop for a submarine is thus the bottoming: the ability to land the submarine on the bottom of the water layer.<br />
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A submarine with such capability could wait on a zone with a compliant bathymetry and, as such, would be a real silent hunter.<br />
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A "classic" submarine is able to bottom only if the bathymetry is a homogeneous plan with a small slope.<br />
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Recently, the department of Marketing and Communications at DCNS has released a good joke about this subject on Youtube.<br />
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Here is the video. Enjoy!!<br />
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<br />Nicolas Cusseauhttp://www.blogger.com/profile/09668083353752917843noreply@blogger.com1tag:blogger.com,1999:blog-4290554118241192536.post-77038307055306559872013-09-08T08:44:00.003-07:002013-09-08T08:44:39.477-07:00Hi!Hi!<br />
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This blog is dedicated to underwater technologies and instruments.<br />
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I expect to keep you informed of the last products developed for the sectors of Defence and Oil&Gas.<br />
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Regards,<br />
<br />
CusstomizerNicolas Cusseauhttp://www.blogger.com/profile/09668083353752917843noreply@blogger.com0