Re: [PSUBS-MAILIST] Blue-green laser (was: Empress of Ireland)

[Coalbunny <coalbunny@vcn.com>]

Oh, you mean a holographic sonar display?  Something 3-D?
Carl


Tim Reilly wrote:
> 
> The system used the three inputs, blue-green laser, high-freq active sonar,
> and passive sonar to create a virtual image of the enviroment around the
> pilot of the craft.  Sounds pretty cool.  My sub, once constructed, is going
> to be a test platform for different types of technology and for mapping
> bottom areas to its operational depth.  Currently I want it to have an
> operational depth of about 500 feet.  I will expand from there.
> 
> Tim R.
> 
> -----Original Message-----
> From: Michael B Holt [mailto:tlohm@juno.com]
> Sent: Friday, March 21, 2003 11:15 AM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] Blue-green laser (was: Empress of Ireland)
> 
> On Fri, 21 Mar 2003 10:19:16 -0800 Tim Reilly writes:
> >Speaking of dreaming, I was just reading a book called Stingray by
> >Bill Keith, and I was wondering, if there are any electronics engineers
> out
> >there, if a system using a blue-green laser and active and passive
> sonar
> >would be practical.
> 
> In Busby, there's a chart showing the attentuation of various
> colors.    Well, I remember seeing one somewhere.   Blue-green
> penetrates deeper than any other color, I think.
> 
> What did that system do with the combination of laser and
> sonar?
> 
> > This is my primary concern with a sub, is being  able to
> >see for an extended distance under water.
> 
> That's one thing that holds me back from getting really
> serious: around here, visibility is about a meter at noon
> at a depth of a meter!
> 
> Mike H.
> 
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