Earth oceans and sea is still to be explored to its full extant. There are new discoveries almost on day to day basis. We think why it is so difficult to go inside the water and explore each parts. With all these technology and science, can’t we just send robots and machines to every corner to know the hidden secrets of our planet.
Our body remain weightless inside the water but their is pressure of water which our bodies can take. We usually swim at a top level of the water, due to which don’t feel the pressure of water. The fluid inside your body also pushed the water outside, thus you don’t feel the pressure. As we go deeper into the water we notice that there is immense pressure which can literally crush you.
It is called fluid pressure or hydrostatic pressure that pushes from outside. When you few feet below the water surface you would notice fluid pressure, specially in your ears.
While you go deeper in the sea, you feel more and more pressure of the water. The pressure would make you feel that you are being pushed inside.
For every 33 feet (10.06 meters) you go down, the pressure increases by 14.5 psi.
You must be wondering how fishes tolerate such pressure level, specially whales. There bodies structure is made in such a way that they can tolerate high water pressure. Their ribs and bendable cartilage allows them to go deeper into the water.
So, how deep really humans can dive underwater ?
Lets examine, how deep is the deepest spot of ocean is. The Mariana Trench or Marianas Trench is the deepest part of the world’s oceans. It reaches a maximum-known depth of 11,034 metres (36,201 ft). Just to give you scale of measure, if you drop Mount Everest in Mariana Trench, its peak still be 1.6 Km underwater.
At bottom of the Mariana Trench the pressure is 1,086 bars (15,750 psi), more than 1,000 times the standard atmospheric pressure at sea level.
Does life exist at such a high pressure area ? Yes. In 1960 an expedition have found out that large creatures living at the bottom, such as a flatfish about 30 cm (12 in) long, and shrimp.
However, the Professional Association of Diving Instructors (PADI) defines anything from 18 metres (60 ft) to 30 metres (100 ft) as a “deep dive” in the context of recreational diving (other diving organisations vary), and considers deep diving a form of technical diving.
In technical diving, a depth below about 60 metres (200 ft) where hypoxic breathing gas becomes necessary to avoid oxygen toxicity may be considered a “deep dive”.
Human without any vessel can go upto 1090.4 ft deep. If you wondering of going more deeper than this. Let us make you aware that this is a Guinness World Records set by Ahmed Gabr who did scuba diving upto 1090.4 ft deep in red sea in Egypt. That’s humans limit in water, till now.
And if you are in submersible vessel like Deepsea Challenger, then you can go as deep a Mariana Trench.