[PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar

Wed May 27 18:19:29 EDT 2015

Antoine,airmar produce most of the transducers for lowrance.Below is an airmar link to several common wiring diagrams.Airmar FAQ - Common Wiring Diagrams?

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| Airmar FAQ - Common Wiring Diagrams?Below is a list of commonly used wiring diagrams for popular fishfinder and ... |
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Alan

   From: Antoine Delafargue via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, May 28, 2015 9:06 AM
 Subject: Re: [PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar

Hi Cliff, For my Pilot Fish project I ordered a cheap Airmar P79 sensor also with NMEA 183 comms to use as a depth sounder, but I am struggling to find info on the pinout: which cable color is which... did you find info on this?
regardsAntoine

On Fri, May 15, 2015 at 3:53 PM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Alan, I am not sure packaging a fish finder sounder transducer in a 1-atm pod is necessary for 500ft.  My guess is most of these are fully potted and cab take the pressure.  
BTW, I am implementing a Airmar DST800 DST800 —Thru-Hull, Smart™ Sensor - Airmar Marine Transducers part of my R300 upgrade.  This sensor will give me altitude, speed and water temp.  The sensor sends out a NMEA 0183 ASCII sentence string that I will connect via RS232 serial feed into a coprocessor on my PLC.  I then can parse the string to get data.  I am using the same coprocessor so parse another transducer that gives me roll, pitch and heading.  This transducer is packaged in a custom 1-atm anodized aluminum housing.
I looked at ROV sounders but these are expensive at $1500-$4000 each where these fish finder sounders are cheap.  
Cliff

Cliff Redus
Redus Engineering
USA mobile:  830-931-1280
cliffordredus at sbcglobal.com 
      From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, May 15, 2015 4:41 AM
 Subject: Re: [PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar

Have just come back from the local boat show after talking to a couple ofexhibitors about sonar / depth sounders.I am still finding my way here. Was told I could mount a forward looking sonar insidea fiberglass hull & would loose about 15% of my range as apposed to in water mounting.They said the depth sounder worked better than the forward looking sonar through fiberglass.Why not have a small view port type arrangement in the bottom or up front of the submarinewith a fiberglass plate in it. Then glue the transducer to that.For a 3" diameter fiberglass plate .55" thick, I get a 4000ft crush depth. Safety factor of 4 forplastics I think, so 500ft capable operating depth.Quote from installation pdfs below......As an alternative to transom mounting, it is possible on manyfiberglass-hulled boats to glue the transducer on the inside ofthe boat hull. Since fiberglass has similar sonarcharacteristics as water, the sonar signal can pass throughthe boat hull with minimal loss. The hull of the boat must besingle layer construction (not double-hulled) Also, any airtrapped in the lamination of the fiberglass would prevent thesonar signal from passing through.Inside the hull installations require no holes be drilled into theboat and through experimentation, high-speed operationcomparable to transom mounting can be achieved. Two-partslow cure epoxy (not included) is required to glue the transducer in place.......In-hull: Installed against the inside of the hull bottom, the in-hull transducer sends its signal through the hull. “Shoot through hull” transducers do not need direct water contact. They’re glued to the inside of the hull with silicone or epoxy. An in-hull transducer is a good choice for a trailered boat, a vessel with a stepped hull, and for other types of high performance hull designs, as there is no drag, hull penetration or potential for fouling. No integrated temperature sensor. Can be installed while boat is in the water. For deadrise angles up to 30 degrees. As with thru-hulls, the selected location should be aft and close to the centerline so that the transducer is in the water at all times.In-hull transducers need solid fiberglass at the mounting location; no foam or plywood coring material, or air pockets. A typical 600W transducer can transmit through 1/2" to 5/8" (12-16mm) of fiberglass. To install inside a cored hull, find a location with no coring or remove the core material.Alan

     From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, May 11, 2015 5:10 AM
 Subject: Re: [PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar

Looks really nice Hank, but couldn't find a price.
They are marketing to ship owners not recreational boat market.
Had looked at other 3d forward scanners & they are quite a bit more than
the Sinrad 2d.
Alan 

Sent from my iPad

> On 11/05/2015, at 12:26 am, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Alan,
> Check this system out, you probably have seen it.  This would be very nice to have.
> Hank
>> --- On Sun, 5/10/15, hank pronk <hankpronk at live.ca> wrote:
>> 
>> From: hank pronk <hankpronk at live.ca>
>> Subject: DOSITS: Forward Looking Sonar
>> To: "hanker_20032000 at yahoo.ca" <hanker_20032000 at yahoo.ca>
>> Received: Sunday, May 10, 2015, 8:25 AM
>> 
>> 
>> 
>> http://www.dosits.org/technology/locatingobjectsusingsonar/forwardlookingsonar/
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> Personal_Submersibles at psubs.org
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