3 miles down

[Kwacky]

I think most of them will look like ariline food

[Monty]

Why the chuff would you use 37.5 kilohertz for something designed to be found long way away underwater?

[Hippy]

I've seen this discussed at length on scuba boards

http://www.scubaboard.com/forums/diving ... depth.html" onclick="window.open(this.href);return false;

But theoretical crush depths are one thing, uniform pressure is another.
At the depth of 3 miles, the bodies would look fairly undamaged.

[Kwacky]

I can't accept that a human body at 3 miles down would look the same.

The skull cannot withstand that sort of pressure. The rib cage is designed to protect two large air sacs.

Take a belt and wrap it around an arm or leg then pull. Doesn't the belt constrict or does the limb remain the same?

[Itchy]

There's also the factor of how fast the plane was going and the angle of it when it hit the water. A heavy impact is going to tear the plane apart and whatever's inside it isn't going to fare too well.