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Old 18 March 2010, 12:51   #1
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Side Imaging for SI virgins

I've looked through the forum for side imaging sonar, but was looking for some advice.....

We usually dive known sites and have accurate co-ords (our own I hasten to add, not from the UK Hydrographic office, at least three of our regular sites are well out compared to the data held by UKHO!). We use a basic depth sounder also.

However, we are keen to get out and try to find a few of the lesser known sites /wrecks..as listed in an old book we have recently obtained....

I guess we ned to go the side imaging route, but we will be on a budget....

Does anyone have a reccomendation (having used it themselves) for what we should start with.....we can always upgrade as we improve.....

We would like to download info to PC also if possible....but not essential.

Second hand would be a good option too...if anyone has upgraded themselves.

Thanks in advance.

Dan
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Old 30 March 2010, 15:59   #2
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Side scan Sonar

Hi Dan, I am in the market for something similar.
A friend of mine has bought the Humminbird Side scan sonar but has had issues with the transome mounted transducer, (interference from the engine).

I had a look at the lowrance stuff at the boat show last year in Southampton, it looks pretty good but I think if you are going to do it, then you have to go for a high spec unit with a towfish.

Personally I am trying to persuade the missus we need to aquire a reson seabat multibeam sonar.......I am still working on that!!



Good luck and let me know how it turns out.

Lee
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Old 30 March 2010, 18:31   #3
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Have you looked at the starfish sonar?..I think its still made and is a towable one
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Old 30 March 2010, 19:28   #4
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Have you looked at the starfish sonar?..I think its still made and is a towable one
I think he'll be looking at either transom mounted of thru hull.
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Old 31 March 2010, 05:09   #5
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Hi Dan,

Have you seen Karlt's posts on here? He has an excellent set up and really knows his stuff.

We are also thinking of adding advanced sonar to our video surveying capacity, at the moment we are looking at the Lowrance Structurescan system which is very keenly priced indeed.

There is a depth limitation to the systems that use a hull mounted transducer, about 50m, any deeper and you need a tow fish (paravane).

The Lowrance set up allows you to take screen grabs and save them to SD card.

Edit: Be aware that downscan is subtly different to sidescan and that wreck images may be better.
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Old 31 March 2010, 05:36   #6
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I think he'll be looking at either transom mounted of thru hull.
I have a humminbird 797 transom mounted on my boat, its a bit hit and miss with regards to quality....I probably havent got it set up quite right but the manual is huge!

I had quite good pics of the Elk in Plymouth Sound at just under 30m but it got confused going over the JEL which starts at about 8m.

You have to be going dead slow as not to disrupt the signal from what I can make out.
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Old 31 March 2010, 07:53   #7
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Quote:
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I have a humminbird 797 transom mounted on my boat, its a bit hit and miss with regards to quality....I probably havent got it set up quite right but the manual is huge!

I had quite good pics of the Elk in Plymouth Sound at just under 30m but it got confused going over the JEL which starts at about 8m.

You have to be going dead slow as not to disrupt the signal from what I can make out.
Miller,

Can you post a pic of the Elk scan, that would be very interesting.
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Old 31 March 2010, 11:26   #8
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Sorry all!!!

I posted this a while ago and thought it had died a death....didn't see it in new posts either for some reason.....

I wil have a review of all the products listed.....thanks again....

Dan
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Old 31 March 2010, 18:03   #9
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Elk Scan

Quote:
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Miller,

Can you post a pic of the Elk scan, that would be very interesting.
Yes, can you please post a scan of the Elk please?
I have not dived it in 12 years and I would like to see how it is looking at the moment.
(I also want to see how your imaging looks)!!

Thanks

Lee
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Old 31 March 2010, 18:27   #10
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I wish, I didnt save it, was just amazed I got it to work! It only looks like a rowing boat from above though!
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