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RE: [PSUBS-MAILIST] Passive vs active sonar
Since half of my sub design stays on the surface, a strobe light and
divers flag will probably keep me safe. I need the sonar just to tell
me when it's deep enough to actually flood the tanks and not plow into
the mud.
On Fri, 2003-03-28 at 01:58, jbarlow@bjservices.ca wrote:
>
> 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
> >
> > The new Guardian
> >
> >
> >
> > D! o you Yahoo!?
> > Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > HGC. Michael
> >
> > The new Guardian
> >
> >
> > ---------------------------------
> > Do you Yahoo!?
> > Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
>
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