SO CONFUSED!!!
Why can't submarines go to the bottem of the ocean?
It is to do with pressure gradient
Total nonsense. Subs go to the bottom of the ocean each time they sink. Now if there is an inversion layer, either thermal or salinity, they can "float" on that layer, but they certainly can go through it.
I apologize for any confusion caused. The ability of submarines to reach the bottom of the ocean is indeed limited. While it is true that submarines can dive to significant depths, there are certain factors, such as pressure gradients, that prevent them from reaching the absolute bottom.
The primary constraint is the intense pressure at great depths in the ocean. As submarines descend, the amount of water above them increases, leading to a higher water pressure. This pressure compresses the hull of the submarine, and if the vessel were to go too deep, the pressure could become too great, risking structural integrity and potential collapse. The pressure at the deepest parts of the ocean, such as the Mariana Trench, can exceed 1,000 times atmospheric pressure.
To withstand the high external pressure, submarines are constructed with strong hulls made of reinforced materials, such as steel or titanium. However, even with these strengthened structures, there are limits to how deep they can safely operate. The maximum operational depth varies depending on the submarine's design and construction.
It is true that submarines can utilize buoyancy control to regulate their depth. By adjusting their ballast tanks and the amount of water they take on or expel, submarines can achieve neutral buoyancy and hover at a desired depth. This can give the impression of "floating" in the water column, even though they are not resting on the actual ocean floor.
In summary, submarines have physical limitations due to the increasing pressure as they descend into the depths of the ocean. While they can reach significant depths, there is a maximum operational depth beyond which it becomes unsafe for the vessel.