Alan,
I will chip in $80.00 and you match this. I will build one such system that you install aboard your boat for keeps. Then you can tell us all what you think....sound fair?
David Bartsch
From: alanjames@xtra.co.nz
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] new sonar
Date: Mon, 18 May 2009 09:12:49 +1200
Hi David,
Maybe you could sell it to the French and British navy for thier nuclear submarines.
Two things; first if it was to avoid collision on the surface it would need a big range to detect a fizz boat zeroing in at 30 knots (15 meters per second ). The second is, is it any more advantageous than a depth sounder that you can pick up for the same price ?
regards Alan
----- Original Message -----
Sent: Sunday, May 17, 2009 9:17 PM
Subject: [PSUBS-MAILIST] new sonar
I am in the process of developing a passive sonar that's primary purpose will be for collision avoidance.
It will consist of a small electronic enclosure box with but a single amplification channel contained within. A single hyper sensitive passive hydrophone that is directional would be mounted facing forward. The output would be monitored by either headphones or a small dedicated wall mounted speaker.
A power isolation switch, power present indicator light, gain and volume control level knobs will be all that will be needed to control this simple system. This enclosure will be quite small.
Prior to surfacing, the submarine would make a complete circle so as to determine local surface traffic conditions. Once satisfied of the level of local activity, the submarine would proceed to a shallower depth or surface altogether.
In that no outgoing communications will be involved in this system hence no voice transmitter, I am looking to be able to produce each unit for about $160.00. I would consider this a safety tool that should aid in making surfacing a bit less hairy.
Anyone interested or have any thoughts on this one?
David Bartsch
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