Posted 2/18/2008 4:09 PM (#66082) Subject: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Solve the Underwater Mystery
Presented by: Aqua Vu , Walleyefirst.com & PWT Pro Doc Samson
From above the surface, a lake can deceive us. Some of us imagine we’ve fished every rockpile, weedbed and mudflat in our home waters; that thanks to modern sonar and advanced mapping software we know the underwater terrain like the back of our hand. Yet the reality is, in most of our minds, the true appearance of the freshwater underworld remains elusive. Clearly, the images scrolling across our sonar screens yield a representative picture of reality. Still, we continue to harbor curiosity, uncertain of the mysteries that lie beneath the surface.
It is with this curiosity in mind that Walleyefirst.com presents the first in a groundbreaking multi-part series we call “Solve the Underwater Mystery.” In this Walleye First exclusive, we’ve enlisted the considerable knowledge of professional walleye angler and electronics guru, Bruce “Doc” Samson.
In each installment, Doc presents us with a Lowrance sonar chart, then asks us to “Solve the Underwater Mystery,” and guess what the sonar is trying to show us. It could be a rock-to-sand transition, a school of baitfish, a sunken Volkswagon, who knows. Your job is to solve the mystery.
After an appropriate period of time (1 to 2 weeks) during which you can ask specific “yes” or “no” questions, and make no more than one guess, Doc will show us an Aqua-Vu underwater video clip, revealing the true answer. The first individual to provide the correct answer wins a new Aqua-Vu Underwater Camera. (If no one Solves the Underwater Mystery, Doc will provide more specific clues, and you will be allowed to provide one additional guess.)
About Doc - Bruce Samson left a full-time career as a medical doctor in 2002 to pursue his lifelong passion for tournament walleye angling. Along with partner Jerry Anderson, Samson won his first major tournament, the prestigious MWC Championship in 1986. He remains highly successful today, his most recent victory the 2006 PWT Super Pro event on Ottertail Lake, Minnesota. He currently conducts a series of unique electronics schools, teaching anglers the fine points of sonar, GPS mapping, and underwater video. Learn more about “Doc” and his schools at http://www.hightechfishing.com.
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Posted 2/19/2008 7:45 AM (#66095 - in reply to #66093) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 2567
Location: Manitowoc, WI
Do we need to name the structure or just what type? If I think it is a reef can I say reef or do I have to say it's Niagra Reef near Port Clinton? And no, that is not my one guess!!!
Posted 2/19/2008 9:43 AM (#66103 - in reply to #66101) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 1382
You get one shot to name the structure, based upon the clue Doc gave. Keep in mind you also need to be registered and logged-in to guess, otherwise we won't be able to verify who you are.
Good luck. I have my guess but won't reveal it, only Doc knows the answer at this point.
Posted 2/19/2008 2:18 PM (#66113 - in reply to #66111) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 2445
Location: Fremont, Wisconsin
I hope Doc does not answer questions from unregistered users. If so let us know so we may hide our identity as well so as we are not leading our competition into our backyards. Thanks for the games, this will be fun.
Posted 2/19/2008 4:14 PM (#66119 - in reply to #66092) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Location: Fargo ND
Now I am confused, in the instructions and intro, it says guess what the screen is trying to tell us? Then with the first screen, the question is "Name the location?"
Heck, IMO it could be any hump on any lake in the world? Let's suppose that any of the above answers is correct as far as location. What did I learn from that?
Sorry to rant, but I think the concept is good and was looking forward to playing, but IMO not worth it on this one.
Posted 2/19/2008 4:54 PM (#66120 - in reply to #66119) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 1382
The goal is to ask questions which will steer you toward the answer. First correct answer will win an Aqua Vu. Doc will come in each day and address each posted question with a yes or no.
Posted 2/19/2008 7:26 PM (#66127 - in reply to #66120) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Answers to questions: natural MN Lake. I agreed to wait a few days to give the correct answer. If you get it right I will still wait as we are trying to make this a learning experience besides a chance to win an Aqua-Vu. You are doing well considering the limited data you have. When the answer is revealed we will have some Aqua-Vu video of the structure. A hump looking structure on the sonar could be the edge of a drop that you drove to the top and then drove back the same way you came, a hump, or the tip of a point. All of which will look like a hump on the sonar. The picture is just history not the actual shape of a structure. The depth under the boat is the far right side of the screen.
If you want to know far back a fish or hump is you must first make a waypoint with the sonar cursor and use the map cursor to see the distance as shown in the example.
I drove across the top at 5 mph. With Lowrance color the strongest echo is yellow, red next, blue the weakest and white none. The clumps are baitfish.
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Posted 2/20/2008 10:29 AM (#66146 - in reply to #66145) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
I am sorry for the confusion. The bump is a type of structure that has many names. Tha answer is a natural type of structure on a MN Lake. The attached screen capture is the West end of Sloppy Joes since that was one guess. Sloppy Joes is the most famous gravel bar in Mille Lacs Lake.
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Posted 2/20/2008 4:54 PM (#66166 - in reply to #66161) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 1991
Cool I guessed Sloppy Joes
No I take that back, after studying the picture I broke out my maps and I noticed that it resembled Sloppy Joes on Mille Lacs, I recognized that rock that I get snaged up on all the time
Posted 2/21/2008 9:13 AM (#66185 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 701
Location: upper michigan
it looks like a large rock or rock pile. with a transition from smaller rock to mud on both sides
Brett King
Posted 2/21/2008 9:41 AM (#66186 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
Looks to me to part of the Boot mud falt on Mille Lacs lake maybe the hump of the SW end of it? My only issue with this guess knowing Doc is that would mean he is miles from the closet rocks to throw an anchor on!!!!!!
Posted 2/21/2008 3:35 PM (#66209 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 1406
WOW we've had guesses from Mud, sand bar to rock reefs to metal, amazing all these guesses and the structure is very defined, I'm no Lowrance genius matter of fact never owned one, is it fiberglass?
Posted 2/22/2008 8:33 AM (#66234 - in reply to #66209) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Jerry is the winner as he gave the first correct answer. Zach can now show you the underwater video of a mud flat on Mille Lacs Lake, MN where I did the sonar recording. I am leaving town for a few days and when I get back I will explain why there were many answers and why they all could be correct. Sonar is just sonar. It was just supposed to be a guess the sonar but I think a teaching session on bottom content is a good idea as we all struggle with looking at the sonar and wonder what is this bottom made of? I have many recorded charts of the bottom that I have studied with my Aqua-Vu so I could understand what the sonar is “seeing”. For Jayman the unit was set North up, I forgot to answer that question.
Posted 2/22/2008 3:14 PM (#66273 - in reply to #66262) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 3899
Well, it certainly is a different type of mud than what we have on Bago, for sure.I was going to say it's a rock pile, or reef, with the boat now over a softer bottom, perhaps a mud flat. As far as being, famous, I wouldn't have a clue. The sonar definately shows harder bottom on the shallower portion, that which rises to about 28 feet. Then when it drops down to 34', it is definately a softer bottom. I'd call this a transition from hard to soft, and would not categorize the image as a mud flat. Even in the video, it appears like rock reefs that the camera is banging into.
Posted 2/22/2008 3:54 PM (#66279 - in reply to #66082) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 82
Yeah, agree.
That specific piece of structure is what I would think would be a mud hump, rock pile or something other than a mud flat. But, I'm not an expert either.
to me flat = no change in depth or gradual slope at best.
But, I like the concept of the game. A little muddy (pun intended) this time, hopefully more structured in the future. Post a pic, guys ask questions, questions get answered and an answer period is set.
Posted 2/22/2008 4:55 PM (#66281 - in reply to #66082) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 617
Location: Oshkosh, Wisconsin
Its neither mud... nor flat.... Sorry, but that isn't making a lot of sense to me.
If you had asked "Where is the boat at the very instant this picture was taken",, I'd say, yeah, just crossed an edge and your now out in some mudd, but you appeared to be asking what the "bump" was. More specifically, you seemed to be implying that the "bump" was a famous piece of structure, not one piece of several thousands of acres of mud.
Posted 2/22/2008 5:20 PM (#66282 - in reply to #66281) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 319
Congrats Jerry!
The way I see it, Jerry took less than an hour to figure it out. They can't make the game too obveious, they are giving away a piece of equipment with a higher price tag. The rising ridge at the edge of the flat would be considered part of the structure.
Posted 2/22/2008 5:43 PM (#66285 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 859
Location: Appleton wi
Nice job jerry! I think round 2 will be alittle more competitve knowing more what doc's looking for in answers. Doc is it possible to get some W.P #on that mud flat structure. I'm thinking making a summer visit there this summer!
Posted 2/22/2008 6:09 PM (#66286 - in reply to #66285) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 2567
Location: Manitowoc, WI
Thank you one and all!!! I said mud flat because of the drop, the thickness of the bottom on the sonar, and I recall fishing those mud flats on Mille Lacs and seeing that type of drop in the structure. If you fished these area before you'll find the fish tend to be on the upper lip of the structure just before it falls off the edge. They are famous because these structures are well know to Minnesota anglers who fish Mille Lacs, but I can see how someone who has never fished there would be lost for an answer. Just a lucky guess!!! I look forward to receiving the Aqua View and using it this summer!!
Posted 2/23/2008 10:15 AM (#66303 - in reply to #66286) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 2445
Location: Fremont, Wisconsin
well, I think it is a nice thing to win. Not quite sure how it all works yet. Jerry just blurted out the most famous structure to MN there is. Maybe Doc is under estimating the crew here. I still think that reading could have been many different kind of structures in many different lakes in many different states.
Posted 2/24/2008 1:19 PM (#66338 - in reply to #66303) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
The structure is a Mille Lacs Lake mud flat. The reason they are called mud flats is that are flat on top. They look like the buttes you see in the West with the flat tops. The mud flat is surrounded by "mud" but these “muds” are different in hardness. The mud flat is hard mud and rare small rock is some places. I have viewed the small rock and I found it at the deepest part on the side of the drop. The surrounding mud is central lake basin mud which is like Winnebago “mud”. It looks like a wingdam because of the transition from one hardness to another and the shape looks the same on the display. All sonar does is display the returning echoes as their distance from the transducer and the strength of the echoes. The display shows the echo strength as whites and grays on a B&W unit and colors on a color unit.
On the first screen capture you all noticed the difference echo strength of the top and bottom depths which was the most important clue. Lowrance’s default screen has white-no echo, blue-weakest echo, red-next, and yellow as the strongest. You can change the colors by adjusting the Colorline. You can change the way the echo strength is displayed by adjusting the sensitivity. If you have any questions on the above I will provide the best answers I can. After that I will make some more posts on why we all struggle with interpreting bottom content since it is very important for fish location. I have been struggling with what the bottom is made of since I figured out fish prefer different bottoms at different times of the year. I have used heavy sinkers for years to try and confirm the sonar and now I use my Aqua-Vu. What I have learned is that it is more difficult than I imagined.
Hummin
Posted 2/24/2008 10:09 PM (#66351 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
Wonder if someone has a screen shot of this particular type of structure taken with the side imaging of the birds'? Would really shake up understanding the differences between the 2 products!
Posted 2/25/2008 8:53 AM (#66362 - in reply to #66082) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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I'm wondering how this is suppose to EDUCATE the average angler VS confuse them? I appreciated the explanation. But I thought the point of this whole promotion is to educate vs "trick" them.
Posted 2/25/2008 9:20 AM (#66364 - in reply to #66362) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Seems pretty clear to me. On one hand you have a sonar chart-- what is the structure or object in question? On the other hand, you have an underwater video clip from an Aqua-Vu-- this shows us the "reality" of what sonar was trying to depict. In this case, it was the edge of a mud flat.
Think the point was to force us to put our thinking caps on. To make us realize that we don't really know what sonar is showing us until we see it with an underwater camera. Guess I thought this was pretty cool, and I'm looking forward to the next one.
Posted 2/25/2008 10:00 AM (#66366 - in reply to #66364) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Most would associate a mud "flat" with being a flat piece of sturcture. Not a mud hump and call it a "flat". I understand that what you see on the sonar is not what you see on the bottom all the time.
Posted 2/25/2008 10:25 AM (#66369 - in reply to #66082) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 617
Location: Oshkosh, Wisconsin
IMHO, an 8 foot high pile of rock in the middle of an otherwise flat, muddy areas is a reef, not part of the mud flat.
Had the question been posed, where is the boat at the instant the photo was taken, I would agree with the "mud" answer. All some of us are trying to say is that the question appeared to be about the 8' rock/hard bump that was surrounded by a much softer bottom.
Don't get me wrong - this is a great idea. I'm being a little critical because Jerry won and I didn't....
B JAY
Posted 2/25/2008 11:25 AM (#66371 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
IT'S A TIMBER CRIB MADE BY THE D.N.R TO ATRACT BAIT FISH ON CASS LAKE, MN.
Posted 2/25/2008 11:50 AM (#66374 - in reply to #66369) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
The recording was done by driving from the bottom of soft mud (Lake Bottom) and going over the “mud flat” and driving off the other side on to the soft mud at the bottom. Mille Lacs mud flats are very hard. It was unfair if you have never been on Mille Lacs but it makes for an interesting topic. These structures are not common except at Mille Lacs. Hard and soft bottom is easy to differentiate when both are on the screen. However if there is no change it is very difficult. This screen capture doesn’t show much difference in the bottom since I am moving slowly on the bow mount using the Aqua-vu. The difference from soft to hard is very slight on the sonar but obvious on the underwater video. It is just plain difficult.
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(deep transition web 2.jpg)
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(CW-deep-transition-deep-web.jpg)
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(CW-deep-transition-web.jpg)
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Posted 2/25/2008 12:09 PM (#66376 - in reply to #66127) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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In one of your post you mentioned you were went across the hump at 5 mph. Was this with the aqua view also or did you have to go over it slower with the camera to get that good of a film clip? The reason I ask is one of my biggest complaints about using the camrea is the time it takes out of a fishing day. I have mine mounted on the gunnel of my Lund with a ram mount just to the right of my dash so I can see my Lowrance and the aqua view at the same time. Do you have any tricks to try and keep the lens and cord vertical at those depths. It seems I can only barely creep along with mine to keep it from angleing back at 45 degrees. Your video clip shows what seems like a very vertical angle with the lens.
Thanks
Posted 2/25/2008 12:18 PM (#66378 - in reply to #66376) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Location: Berlin
I don't know guys, I really liked this. The fact that it was MUD made it really interesting. I have never heard of that before. I pride myself on knowing my electronics inside and out and I would have swore that was rocks or sand, maybe even clay. The fact that it is mud amazes me and I thank Doc for showing us this. I do think the competition was a bit unfair since I have never fished the lake but the main point here was to learn, not to win a Aqua View. I feel very satisfied.
One question for Doc and others that are familiar with this type of mud, could this be silted over rocks or sand? I guess being so deep there is no way to tell but I would love to shove a rod down there to find out.
I am ready for the next one, bring it on. As for Jerry, you never stop impressing me:)
Posted 2/25/2008 12:59 PM (#66381 - in reply to #66380) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 3899
I'm not trying to be critical of Doc, or the contest, but it is was a bit confusing. I can see from the video that the hump may indeed be hard mud. I certainly wouldn't call those a mud flat, but that is maybe just my lack of exposure to MN lingo. Also, it certainly is not the same as in the last still pic just above. If it was explained that where the boat is on the sonar, then I would definatley have said that was a mud flat. The fact that ML has both hard and soft mud, and the hard mud flat raises up 8 feet from the soft mud surrounding it, should have been required in any answer given.
I'm not begrudging jerry of a free camera, but was his answer just a guess? And were you just looking for a guess, or an real answer with an explanation? If this was just a win a camera contest, then guesses without reason would be OK. But if this is indeed supposed to be a teaching/learning/reward experience, then I would say that an explanation of how jerry came up with Mille Lacs Mud Flat would be required.
I have a great deal of respect for Doc and his knoweledge of high tech electronics and their application. I learn from him everytime he answers questions, and I did learn from this. So, this is not sour grapes. I'm just expressing my feelings on how to improve this learning opportunity on here. And I'd like it not to turn out to be a bunch of WAGs cluttering the page. See what I mean?
Posted 2/25/2008 1:20 PM (#66384 - in reply to #66381) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 1382
I think the point is that the "mud flats" on Mille Lacs are more that just mud. If you've fished a Mille Lacs mud flat before, given the clues, the depth of water, and knowing where Doc has spent alot of time, it would have been pretty easy to guess Mud Flat on Mille Lacs. Seconds after the post went up I called Steve W and told him I thought it was Fellegy's needle, a part of a mud flat on Mille Lacs, given the clues. Seeing the sonar imagery vs the video was incredibly cool and I learned a ton just from that single example. Looking forward to more.
Posted 2/25/2008 1:28 PM (#66386 - in reply to #66384) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 3899
Absolutely looking forward to more. But let's avoid the WAGs, and have some reason behind the answers. That's all I'm saying. Maybe kinda like the Riddler does his scavenge hunt? Lead us all through a series of clues and questions, about a sonar image or log.
Is there a way yu can attach a sonar log to a post? Then we could use that log on the Sonar Log Viewer to play it back and analyze? That would be cool.
Posted 2/25/2008 3:56 PM (#66393 - in reply to #66391) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Jim M. The sonar recording was done at a different speed on the “mud flat”. The last sonar recording with the 2 underwater photos was done simultaneously. I have to go slow with the Aqua-Vu because of the drag. I use the Aqua-Vu to examine something and then pull it up if I am in a hurry. I will use the camera while I fish at times. If you find something interesting on the sonar, I throw a buoy so I know exactly where I want the camera.
Rich S. I have not studied all the flats (way too many) but I have seen small rocks on some so some could be covered with silt. Maybe somebody who ice fishes the “mud flats” and uses a camera will pipe in.
Jayman The CW deep transition sonar and camera shots are from a completely different lake and is rock hump with a transition to the lake basin. I used it as an example to show how hard it is to tell bottom content. I didn’t explain this well enough when I posted it. I recorded the sonar and the Aqua-Vu at the same time as I drifted off the top. The sonar doesn’t show much difference but the Aqua-Vu shows a big difference.
It is hard to come up with a sonar chart to have you diagnose and still turn it into a teaching session. I am thinking! I have many sonar charts but my Aqua-Vu library is more limited.
tyee unlogged
Posted 2/25/2008 5:10 PM (#66397 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
Doc, maybe we need a definition of answers before doing another one. In otherwords what type of answer are you looking for? "mud flat" or Fellegys needle" or "a log laying on the edge of a reef"? At what point are we looking at on the screen?
I would call that a mud hump out in a mud flat after seeing the video! and is it very specific to a particular lake or region of the country? How is this type of structure created? How do you know the density and the depth of that density compared to the surrounding "mud flat" when looking at a Lowrance? This comming from a bird user of course.
Posted 2/25/2008 6:45 PM (#66406 - in reply to #66397) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Tyee
Each new one will be different and I will try to make it clearer and hopefully Jerry won't ruin it next time by getting the answer so quickly!
The mud humps were formed by the glaciers. I am researching if there is a better explanation. They are all 23-26 ft on top, flat topped, and tend to run north to south.
The colors indicated strength of echo return. If the bottom is the same hardness at 10 ft and 30 ft you will not get the same display since the echo return from deeper water is weaker since sound weakens as it travels through the water. Lowrance has auto sensitivity which increases the sensitivity as you go deeper which changes the display. This helps but creates another variable. Boulders are easy to tell since they show up as bumps, big rocks show up as an irregular bottom, but small rocks appear smooth so all you know is it reflects echo better than soft bottom.
Posted 2/26/2008 6:49 AM (#66422 - in reply to #66406) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Hi Doc,
Do you typically run your unit ping speed and sensitivity pretty high when recording a chart? The other evening I was ice fishing with my X-19 and just for practice (and because action was slow) I decided to record some charts. After having been there a while watching the screen with out recording I noticed right away that when I started recording the screen behaved quite differently. It seemed like for a lack of a better term that it sped up? Almos like a slight fast forward look. Certainly not the normal real time screen I was used to when not recording. Not having a lot of experience I was wondering if you have ever seen this or maybe it is just somthing with my units processing speed and I need to slow down the ping speed?
Posted 2/26/2008 9:13 AM (#66431 - in reply to #66422) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Jim M,
I don't see that as I record to the hard drive on my 113HD. I remember what you are talking about when I used my 19. I always run my ping speed at 100% because I look for fish at 20 mph. If you change the ping speed the display changes and I don’t like variables so I leave it high and it works for me. Whatever sensitivity you have doesn’t matter for recording charts as it records raw data and your sensitivity and Colorline settings don’t affect the raw data collection.
Tyee,
I got more info on the flats from a writer who is working on an article on the “mud flats”. They think they were formed as the glaciers receded and left humps and as the lake formed the tops may have been eroded by water as the lake formed. They don’t know for sure.
Posted 2/26/2008 9:25 AM (#66432 - in reply to #66082) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Okay, Gotcha. Thanks for the explanation, Doc.
Next question, could you explain how you have depth recorded on your Aqua Vu. I've only begun playing around with one I have, mostly through the ice since things are stationary and easier to deal with. So I'm curious on the depth and any other "tricks" you might want to offer for open water recording.
Posted 2/26/2008 9:36 AM (#66434 - in reply to #66406) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Location: Fremont, Wisconsin
Doc, I dont think anyone is mad because Jerry guessed it, just more of a "...I wish I would have wasted my one guess on something so obvious as a mud flat on mille lacs". We obviously believed that the guru of all electronics was going to puzzle us a bit more in depth. I guess we will all be a bit more on our toes next time. Very nice prize for a basic answer.
Posted 2/26/2008 10:32 AM (#66437 - in reply to #66095) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Not trying to hijack this thread but for discussion purposes I thought I would throw this out there as an example. I'll look to see if I have any underwater footage to go along with these images. Hope you can see them, they are kind of small.
These two images are of the same structure, so I wanted to see what the difference was between two views you can use on your lowrance. Also, any guesses on what the structure is?
Posted 2/26/2008 11:41 PM (#66512 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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The first couple smaller humps were rock piles with fish scattered around them. The Third and biggest echo was actually a wooden crib that was put in for structure. I was surprised it wasn't a tree. The difference in screen settings seemed to make a difference. I still havn't made up my mind on which one I like better. I think with the bottom color brown it makes it difficult to distinguish hard and soft bottom, but also seperates fish from the bottom a little better.
Posted 2/27/2008 8:12 AM (#66520 - in reply to #66432) Subject: Re: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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Posts: 86
Jayman - 2/26/2008 9:25 AM
Okay, Gotcha. Thanks for the explanation, Doc.
Next question, could you explain how you have depth recorded on your Aqua Vu. I've only begun playing around with one I have, mostly through the ice since things are stationary and easier to deal with. So I'm curious on the depth and any other "tricks" you might want to offer for open water recording.
Thanks.
Jayman,
I use the MAV Aqua-vu which has a depth sensor and temperature sensor built in. I was told the depth sensor is pressure sensitive and I have found it be very accurate by comparing it to my Lowrance.
Posted 3/3/2008 1:24 PM (#66700 - in reply to #66082) Subject: RE: Solve the Underwater Mystery, WIN an Aqua Vu Underwater Camera
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It looks like a hump the high point on the hump is a softer surface than on the sides.of the hump.the grey or color line goes from thick on the sides to thinner on top harder bottoms will return a wider greay band soft muddy bottoms return a narrow grey band. Also on the gradule side of the slope, left side, is a brush or rock pile sticking up.you can tell its tied into the bottom making a spot on a spot. It also shows a fish going up to attack the ball of bait above the spot on the spot. Many or most lake's have these spots .being able to freeze the screen and move the cross hairs is a awsome tool. use it alot marking brush in Kansas.Humps and piles elsewere.
I think this is what he's looking for is how you read this structure.this is how I read it. ;-)I think Im late this is for the first pic.
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