RE: [PSUBS-MAILIST] Passive vs active sonar

[jbarlow@bjservices.ca]

If their OK, I was thinking of five or six pointed in all directions, even
up possibly.

You can also buy very good side scan sonar, but its pricey.  I thought that
perhaps the fish finder would be a poor man's way to roughly estimate
bottom and collisions etc.  It should be good at close range right?  And
that's where you would be most concerned about collisions etc?  I would
think that if it could see fish out to 120' then maybe something as large
as a motorboat or the bottom at much greater ranges??



Jay.





                                                                                                                                                
                      Ward Monroe                                                                                                               
                      <wardomon@comcast.net>            To:       personal_submersibles@psubs.org                                               
                      Sent by:                          cc:                                                                                     
                      owner-personal_submersible        Subject:  RE: [PSUBS-MAILIST] Passive vs active sonar                                   
                      s@psubs.org                                                                                                               
                                                                                                                                                
                                                                                                                                                
                      27/03/2003 09:03 PM                                                                                                       
                      Please respond to                                                                                                         
                      personal_submersibles                                                                                                     
                                                                                                                                                
                                                                                                                                                




It depends on where you aim it.  BottomLine fishfinders have a
sidefinder that will see fish out to something like 120 feet, maybe more
I don't exactly remember, as well as down.  Wiring up several heads into
an array shouldn't be much of a challenge for the electronically
informed.  Color displays are also available.  How cool would that be?

On Thu, 2003-03-27 at 19:36, Michael Fodor wrote:
>
> Yeah it is but you have to keep in mind that all your scanning with a
fish finder is the bottom, and not all around you.
>
>  jbarlow@bjservices.ca wrote:
> A fish finder is active sonar. I don't know how high quality you can get
> or how good they are these days.
>
> I think it might bear investigating though.
>
> Comments??
>
> Jay.
>
>
>
>
>
> Michael Fodor
> To: personal_submersibles@psubs.org
> Sent by: cc:
> owner-personal_submersible Subject: RE: [PSUBS-MAILIST] Passive vs active
sonar
> s@psubs.org
>
>
> 27/03/2003 03:31 PM
> Please respond to
> personal_submersibles
>
>
>
>
>
>
> Are there Passive and Active sonar for sale that could fit into our subs
?
> Any links or sites worth mentioning ?
>
>
>
>
>
>
>
>
> Rob wrote:
> Wow, I can finally add value. Passive sonar (simply put) is listing to
> the sounds around you without doing any noise making of your own.
> Active sonar is generating a sound then listening to the echo from
> objects near you. Active sonar is what you get in the movies. That
> "ping" noise. The active sonar I was used to (x-navy here) does not
> usually sound like the classic "ping".
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of peter
> mckellar
> Sent: Thursday, March 27, 2003 2:51 AM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] Passive vs active sonar
>
> hi all,
>
> could someone please explain the difference between active and passive
> sonar?
>
> thx in advance
> peter
>
>
>
>
> HGC. Michael
>
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> HGC. Michael
>
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