General Vortex Incident Discussion

[Hetland]

A metal detector if a rather small object, much easier to move around than a camera.

Underwater cameras are generally smaller and lighter than underwater metal detectors.

There are metal detectors that can spot an ½ inch copper water pipe 8 feet below ground. If the diver is under a ground slide there are good chances the large amount of metal he carries could be detected. If he is far away in a crevice the device could still detect a disturbance in the magnetic field, much like a radio direction finder. Ask a surveyor or water system specialist what they do to spot water pipes.

How big is a metal detector that can spot a half-inch copper water pipe 8 feet below ground, and is it waterproof to 165ft? Is it negative, neutral or positively buoyant in it's waterproof configuration?

 

[mrmccoy]

http://www.kellycodetectors.com/fisher/fisher_cz_21buy_10.htm

Here is one

 

[Hetland]

Fisher CZ-21 Metal Detector For Sale - Kellyco Metal Detectors

Here is one

$1k+ Yikes!

8" coil, 30" long, 5 pounds. I say that's bigger than a camera

It wasn't clear on what the detection depth was (I'm doubting it's 8ft), but I could see where this would be better than going down there with a shovel, and it could possibly rule out the avalanche possibility (again, depending on it's detection depth).

 

[mrmccoy]

$1k+ Yikes!

8" coil, 30" long, 5 pounds. I say that's bigger than a camera

It wasn't clear on what the detection depth was (I'm doubting it's 8ft), but I could see where this would be better than going down there with a shovel, and it could possibly rule out the avalanche possibility (again, depending on it's detection depth).

When the big man up stairs decides to let him be found, he will be found!

 

[cruiser]

FWIW, I don't think the family can collect life insurance until a body is recovered, can they? This might be why they're trying to find him still.

Laws vary by state, but after an amount of time passes, a person can be declared legally dead.

 

[mike_s]

When the big man up stairs decides to let him be found, he will be found!

since he (Ben) likes to cave dive (w/o certification) , I'd suggest looking for him drinking a cerveza in a bar near somewhere like the Cenotes of the Yucatan peninsula..... IJS.....

 

[Jax]

since he (Ben) likes to cave dive (w/o certification) , I'd suggest looking for him drinking a cerveza in a bar near somewhere like the Cenotes of the Yucatan peninsula..... IJS.....

Good Point, Mike -- I'll volunteer to the family to go search for him . . .

 

[Meister481]

I don't think so. Royal Springs sucks, as does Little River and a few others I've been in. This one appears to suck as well.

Little River and royal only suck during floods. They rest of the time they blow. Consider yourself lucky to be able to dive crappy caves without a 12 hour drive before hand.

Why not just strip mine it and see if anything turns up?

Afterwards could be used as a landfill.

Would be more aesthetically pleasing then the existing rebar and lights.

Agreed. Does the PVC count as a continuous line to the OW?

A metal detector if a rather small object, much easier to move around than a camera.



There are metal detectors that can spot an ½ inch copper water pipe 8 feet below ground. If the diver is under a ground slide there are good chances the large amount of metal he carries could be detected. If he is far away in a crevice the device could still detect a disturbance in the magnetic field, much like a radio direction finder. Ask a surveyor or water system specialist what they do to spot water pipes.

Can it spot 8 inch steel tube 165 feet deep through limestone? That or you will need a BIG ziplock and some lead.

 

[Rick Murchison]

...Does the PVC count as a continuous line to the OW?...

It does for me (up to the crack)
Rick

 

[Dive-aholic]

Underwater cameras are generally smaller and lighter than underwater metal detectors.

Not the one they're planning on using. ROV's can be pretty bulky...bigger than 8 inches around...