Lost treasures and relics, land vs waters in totality comparison

[49er12]

No facts of course can be proven, given the earth is more water than land. Given the facts the amount that keeps being discover on land is much more retrievable for the average person vs the equipment needed for the depths of waters which will be unattainable even for the so called experts. If we can image the depths of the ocean with no obstructions water, for miles, why can’t we manufacture a metal detector for a foot or two depth on land. Answer is they can but will not offer such to the public. You see my point. So we walk and walk and pay thousand for a machine that has a fixed depth coverage , gee smell something, please don’t say oh people would be digging massive holes. Don’t Generalize folks that’s why we are in current dismay today because nobody is fair and doesn’t believe in people. Great question offer an answer other than why do you need to see a foot below,

 

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[Charlie P. (NY)]

Sonar works very well because of the density of water. Doesn't work in air anywhere near as well. A bat may know he's nearing a wall but he won't know what's behind it. Radar/LIDAR doesn't penetrate the soil well at all.

You can make a metal detector that would penetrate much more than a few feet. But you would mess up folk's TVs and Cell Phones and open a lot of garage doors nearby and need special FCC permission to transmit that much energy.
'Course you will eventually cook yourself or otherwise irradiate yourself harmfully. I think we're limited to like 25 watts. Wheel a CAT Scan unit out to the park and see how your depth improves. A submarine of the 1990's used 280,000 watts of power for the sonar. They're probably much above that now.

 

[49er12]

Point well taken utilities, responsible or non responsive as we are, I trust most understand or recognize such. I mean soil density, vs water penetration understood. Not much different actually less dangerous digging a foot in ground than depths of no return, Charlie great point, I don’t think a foot is bad, not counting on a good soil day, everyday use what’s the point of spending 3000 on a ctx, it’s just not about visual is it, I appreciate your thoughts

 

[49er12]

I learn a lot from you thankyou sir, your a true patriot

 

[CASPER-2]

I hit land and water spots with my CZ21 in all metal
areas I hit have usually been pounded by others with every machine out there
I get finds from 1ft-2ft all the time
i go pretty slow and try and dig every whisper
you can see that a lot of my gold is old or not fresh and old crusted silver coins and jewelry
recovered deep - lot of my ocean silver halves were found very deep along with couple of Morgan dollars found too
these spots i hit up here are from spots that go back into the 1800s and many of them been hunted by tons of other hunters
most finds were made in waters 4-6 ft deep
Don "Casper" DeForre | Flickr
ignore the posted dates - they are wrong due to older photo chips
Civil war finds over last few yrs here - found with CZ21 also - since i was pulling
lead sinkers down in 2ft range - thought CW lead might be pulled that deep too - i was right

 

[CASPER-2]

CW 3 ringer found with CZ21 water machine
it was super faint signal - it didnt fall in the hole from the side
when i reached down to pluck it - i was just over my elbow deep
IT'S IN THE HOLE | CW 3 RING MINIE BALL - WAS DOWN ABOUT 1 1… | Flickr