What the range

[IMF2020]

What the max depth ?? has anyone tried very deep say over 200 meters in the sea ...Ive never magnet fished just looking at new way of finding treasure .. any thoughts would be welcomed

 

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[bowwinkles]

that would be very difficult, I do not like to go over 20 feet in fresh water. good luck.

 

[Treasure_Hunter]

200 meters is over 650 feet, hook on to a 200 pound object how will you get it up, you would need a winch to handle that much rope or cable plus weight of rope would add several hundred pounds to weight of object being retrieved.

 

[releventchair]

A steel cable and winch might do it...

Most rope has an elastic/stretch nature to it. The longer the rope the more stretch.
Once the stretch is taken up , you're committed to the force being applied. Releasing tension means something has to give. In my case , the boat rocks. Though tension controls the amount.
I've had a boat gunnel pulled to the waterline almost in shallow water (a dozen feet maybe) pulling on too much weight....Felt like a large engine block kind of weight. It held fast. And likely remains there....

 

[Treasure_Hunter]

A steel cable and winch might do it...

Most rope has an elastic/stretch nature to it. The longer the rope the more stretch.
Once the stretch is taken up , you're committed to the force being applied. Releasing tension means something has to give. In my case , the boat rocks. Though tension controls the amount.
I've had a boat gunnel pulled to the waterline almost in shallow water (a dozen feet maybe) pulling on too much weight....Felt like a large engine block kind of weight. It held fast. And likely remains there....

At that depth it would have to be a steel cable and a winch would be required to even retrieve the cable with out anything on it.

 

[islamoradamark]

thats deep sea fishing

 

[bowwinkles]

If you have a big boat and a few extra bucks then one of these should work for you: https://duckduckgo.com/?q=crane+magnet&t=h_&iax=images&ia=images

 

[IMF2020]

I guess i should of explained more .. i seen super magnets that can be turned on and off like a electric magnet ..i can only get a small fishing boat to use in my search of a area where the fishermen complain about there nets hanging up and getting caught on something ... there was possible 3 war wrecks in this area my dad told me about ... i was hoping to drop a camera with a light with the magnet if its possible ..any ideas ......looking to photo a 40 ton to 6000 ton target ...

 

[releventchair]

Underwater drone camera's are not cheap for quality ones...

As to Philippine's wrecks , I'd need to know the laws before pursuing a magnets use on one.

The fishermen finding structures with nets might be a good future network.
Perhaps they have notes on some shallower structures?