Humminbird Side Imaging Forums
Side Imaging Forums => 997c SI, 998c SI & 999ci HD SI => Topic started by: IRC Kevin on September 13, 2009, 11:26:46 AM
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I'd heard that some have tried the Si at greater than 'spec' depths, so thought I'd give it a try yesterday and headed offf towards the North Basin, 'record' button pressed. I can definitely see bottom structure at 194 feet, but can't post a picture, as there seems to be some sort of annoying glitch with the recordings, as they won't convert with Son2Xtf, but will play with HUmviewer, though the pics with Humviewer are too dark to post.
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Take a snapshot while you are playing back on the unit. This will give us a good idea of what we will see on our unit as well.
Robert
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Will do, Robert. I'm going back to the boat next weekend. I'm also going to try to re-save the recording onto my memory stick and see if it'll convert next time.
Best I can do for the moment are a couple of screenshots. Deepest point of the feature is 196 feet.
Also a 2D screenshot of the feature.
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You may have the Si depth record!
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You may have the Si depth record!
Hi Greg,
Can you elaborate on this please? Do you mean that the Si shows the bottom trace as seen in the 2D view, but is not actually 'seeing' the bottom itself?
Recordings are very poor from this trip, Possibly due to heavy blue-green algae in the Lake- a bit like looking through a net curtain! It's difficult to say what's bottom and what's not, as the Lake floor is absolutely featureless silt in this area and there seems to be no difference between the picture I was getting at 60 feet and the picture at 196 feet!
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IRC,
I was just meaning that that may have been the deepest that I have seen a Humminbird Si unit show any image of the bottom (I am assuming that the picture from HummViewer is showing this) even if it is just a trace.
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IRC,
I was just meaning that that may have been the deepest that I have seen a Humminbird Si unit show any image of the bottom (I am assuming that the picture from HummViewer is showing this) even if it is just a trace.
Doh! That's me being dense. I blame three weeks back at work after the Summer recess! Hopefully I'll get some more time in the deepest parts of the Lake when there's less algae in the water over Winter and see of I can find anything recognisable apart from the geography.
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For Robert, snapshots from unit. (with fish finder view of probable Arctic Char as well !) Rock formation has a very strange profile for a glaciated trough.
(http://i703.photobucket.com/albums/ww34/IRCKevin/S00099.png)
(http://i703.photobucket.com/albums/ww34/IRCKevin/S00101.png)
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Let me guess... time for a towfish? I think all your images need follow up with close scanning from a towfish or diving. 190 feet is deep even for a towfish but still possible. I made some sloppy scanning today and towed my fish too high over the bottom, about 45 feet (depth was 160 feet) and couldn't see any traces of some small targets I discovered before. When I saw these targets the first time I scanned about 15 feet over the bottom. Perhaps this tells something about how difficult it is to find small objects in deep waters.
Rickard
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Those are some great images. What I find very interesting is the rock formation and the strata shown under the surface in the 2d mode. Was the 50khz turned on?
Robert
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Those are some great images. What I find very interesting is the rock formation and the strata shown under the surface in the 2d mode. Was the 50khz turned on?
Robert
The unit is set to default settings for evrything apart from range and sensitivity, so unless that's part of default, the answer is no. My only transducers are a pair of the standard transom transducers.
There didn't seem to be the same level of return from the rest of this area and I'm very curious about this rock formation, as it's setting all my 'geographer' alarms off, as this is not normal in the bottom of a glaciated trough. Could this be man-made object? (I do actually have something in mind)
Regards,
Kevin
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Strata??
I first had to check my dictionary to see what that means.
I noticed that these strata are accompanied to all of my wrecks so far and I think it's a good indicator to decide if it's worth to dive in such a spot.
Here's a 2D shot of the kayak I salvaged yesterday
Regards / Harry
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Let's see,
here's the smal sail boat I've found in May
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This is the old wreck from June in 2D view
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Here's a cropped extract of the screenshot. It really doesn't look natural to me and at the right, the bit sticking up actually overhangs the Lake bed. I can't get an accurate measurement using Si View, as the measurement tool just isn't working on this recording, but using a ruler on my PC screen, I estimate the length as roughly 70-80 feet. Harry- you probably know what I'm beginning to think this may be.
(http://i703.photobucket.com/albums/ww34/IRCKevin/S00100a.jpg)
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Holy smoke and stuff like that!
I didn't dare to ask, but since you relate to me: Iz ziss ze Kaiser's vehicle?? ;D
(Not yours Hendrik! I mean our old Kaiser ;))
/ Harry
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Holy smoke and stuff like that!
I didn't dare to ask, but since you relate to me: Iz ziss ze Kaiser's vehicle?? ;D
(Not yours Hendrik! I mean our old Kaiser ;))
/ Harry
That's what I'm wondering. If this is a wreck, the only known vessel of this size is Kaiser Wilhelm II's yacht (not known if it was wooden or an iron steam yacht and probably won't be able to find out until I have the time to trawl through the newspaper archives next summer recess) This was deliberately sunk (probably in spite) in 1920.
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Just pushed the envelope a bit further. This is a Windermere 17 racing yacht at 208 feet. I'll be putting some more about this and some other pictures onto my personal pages.
(http://i703.photobucket.com/albums/ww34/IRCKevin/S00107.png)
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Hi Kevin,
208 feet?? I go nuts!!
Regards / Harry
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Hi Kevin,
208 feet?? I go nuts!!
Regards / Harry
Hi Harry,
You can probably add another couple of feet, as I don't set any offset for the transducers, which are near the bottom of the stern. Hoping to try for the deepest part of the Lake soon, which is supposed to be 220 feet, although I've seen 240 on my old depth gauge, which is spot on with the HBird. One of the char fishermen reckons he found a hole over 300 feet deep- now that would be something!