EMI in the water?

[sborowko]

When a detector is submerged do effects from EMI go down?

 

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[DizzyDigger]

When a detector is submerged do effects from EMI go down?

Now that's a damn good question!

Spent a good part of my working career involved with test
and measurement instrumentation specifically in the EMI
field. Don't know that I've ever come across this issue before.

...............................

OK..did some research. The salt water acts as a very good
absorber of RF energy, so any measurable source of EMI would
have to be very powerful, very close, and a very low frequency.

In other words, EMI should not be an issue underwater.

That said, if you're working a beach with the coil submerged and
the control box in open air, the control box, depending on its level
of RF shielding, may still be be susceptible to radiated EMI. I would
think that EMI would generally be entering a detector via the coil,
but have no test data to confirm this.

 

[OBN]

Maybe some of the Atlantic City hunters can answer. From what I've seen on the video's it is really bad there, but once you go into the water it much better.

Where I hunt EMI is very low, my worse enemy is rough saltwater and the makeup of the bottom/sand. But that can be bettered by slowing the swing and going with the current.

 

[cudamark]

I find that EMI pretty much goes away when I'm in the water.

 

[sborowko]

I am using a Surf PI DF on the beach close to Boston, MA, and the EMI is pretty bad. Time to get a wetsuit and get in the water!