I NEED HELP WITH SIDE SCAN

[GREENE]

I AM LOOKING FOR ARTIFACTS THE SIZE OF A SMALL CANNON OR SMALLER IN 100FT OF WATER CAN SOMEONE HELP ME WHAT I NEED TO USE ON A FLAT SAND BOTTOM [email protected] OR [email protected]

[Rob Morris]

Re: I NEED HELP WITH SIDE SCAN

Dear Sir,

You can purchase a portable 4100P side scan sonar from Edgetech for $29,500. This system is a dual frequency 100/500 KHz Tow fish and has the resolution to find items smaller than cannons. Unlike the other cheaper systems our 272 TD 4100P system is not a toy. It has been the workhorse of the oceanographic Industry for years. Check out our website and down load the spec sheet at " WWW.edgetech.com"
Please contact me directly if you need more information.

Regards,


Rob Morris

Marine Customer Service Representative
EdgeTech
P.O. Box 850
4 Little Brook Road
West Wareham, MA, 02576
Tel: 508 356 9712 ext 712
Mobile: 508-942-8043
Fax: 508 291 2491
Email: [email protected]
www.edgetech.com

[FJ]

Re: I NEED HELP WITH SIDE SCAN

You might look at Marine Sonic. They produce the highest resolution (highest frequency) units out there. Their website have some very impressive pictures of very small objects at shallow depths that you won't see other manufacturers display.
Good luck,
FJ
http://www.marinesonic.com/



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[Rob Morris]

Re: I NEED HELP WITH SIDE SCAN

You need to look at all the features of a side scan before you purchase one. There are other factors to consider besides resolution.
higher frequency sonars are limited in the range that they can insonify.

Also some of the sonar systems out there use inferior transducer designs that produce artifacts such as "side lobes" which produce banding or striping in the near ranges that can obscur the image.

The smaller lighter sonars are also more unstable, causing poor images and are dificult to get down to the proper towing depth.

Rob

[GBurton]

Re: I NEED HELP WITH SIDE SCAN

Hi,
I may be able to help you with something that works VERY well and is not expensive, depending on how soon you need it.
If your interested please e-mail
Regards

[Jim Kennard]

Re: I NEED HELP WITH SIDE SCAN

I believe that it would be better to use a magnetometer to search for a cannon, assuming that it is made of iron. The side scan will only image the cannon if it is not buried. It will not penetrate the sand and only a little bit through light silt. If the cannon is lying on top of the sea floor, the sonar image will not always be recognizible as what you might expect the cannon to look like. This is due to the round shape of the target and the angle that the sonar passes by the cannon, causing the sonar signal returns to reflect back in other directions . Scanning by the cannon broadside will be the best and passing by on one end will be the worst. Without a lot of side scan sonar experience I do not think that you would ever recognize that you were passing by a cannon.
The magnetometer would be a whole lot simpler to learn and operate and a more reliable way to find a cannon.
For stories of shipwrecks and side scan sonar images visit: [ul]www.shipwreckworld.com[/ul]



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[Kausihan]

I NEED HELP WITH SIDE SCAN TRANSMITTER

I am doing a dual frequency side scan sonar. But i am not able to commutate the thyristor in the transmitter section of my side scan sonar. can any body help me with the commutation technique that can be used in my transmitter

[schmidt karl]

Re: I NEED HELP WITH SIDE SCAN

if cannons are covered with sand - in reality they are on top of the sand - you should use before a magscan.
than in 100 ft deep I would use a side scan with high resolution (min 900 kHz) and flow the fish 5 m above seebed searching 50 m left and right. this resolution should give bright images. check www.marinesonic.com



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