For ships to travel across the high seas, they must support a huge load: the weight of the ship, along with the crew, luggage, accessories and passengers. The secret to why ships don't sink is that they do so with a little help from the principles of density and buoyancy.
Interestingly, cruise ships can weigh between 65,000 and 70,000 tons. They displace an equivalent amount of water when they push down on the ocean, which in the meantime pushes and keeps the ship afloat. That's why ships don't sink.
This is the reason why engineers, when talking about the weight of a ship, mention displacement, not weight. To avoid sinking, a cruise ship must displace its weight in the water before it sinks into the water. From a technical standpoint, designing a cruise ship that is less dense than the water underneath is more difficult.
Understanding why iron ships don't sink is easier with the following example: you need to imagine the difference between dropping a bowling ball into the water and trying to submerge a beach ball into the water. bowling ball can'tdisplace enough water before it submerges, so it sinks. The beach ball does the opposite and stays afloat.
Elementary physics: why the ship does not sink
Engineers help ships achieve buoyancy by choosing lightweight, strong materials and dispersing the ship's weight throughout the hull. The hull of a ship below the main deck is usually very wide and has a deep baseline, or the so-called bottom. Large ships such as cargo, sea, transport and cruise ships typically use displacement hulls, or hulls that divert water to the side to stay afloat. This is the whole answer to the question why metal ships don't sink.
The shape of the case is the key to success
The round bottom movement housing looks like a large rectangle with rounded edges to dissipate resistance or force acting against a moving object. Rounded edges minimize the force of water against the hull, allowing large heavy ships to move smoothly.
If you somehow pulled a cruise ship out of the water and looked at it a few hundred meters away, the hull would look like a huge capital "U" depending on the size of the keel. The keel runs from bow to stern and acts as the backbone of the ship.
On the shortcomings of the common body shape
Like everything else in life, round bottom cases have their advantages and disadvantages. Unlike a boat with a V-hull, whichraises waves from the water, the round bottom allows the vessel to move smoothly through the water, making such vehicles extremely stable and seaworthy. Passengers on these ships rarely experience any rocking or sideways movement.
Boats with round hulls move smoothly, but water resistance makes them extremely slow. They can swim fast only if a high power engine is added to them. However, the need for stability and smoothness outweighs overall speed, making round bottom hulls suitable for cruise ships.
Defender Corps
It is worth noting that the ship's hull is not only the answer to the question why ships do not sink: the hull, among other things, performs a stabilizing and protective function. Reefs, sandbars and icebergs can tear apart fiberglass, composites and even steel. To prevent catastrophic damage, shipbuilders typically build cruise ships using heavy-duty steel and insert double hulls as an extra precaution. The double shell design is a shell inside a shell, such as a tire with an inner tube.
Unfortunately, accidents cannot be avoided. In order to prevent ships from crashing if something penetrates the first two lines of defense, vertical watertight dividers, known as bulkheads, are installed throughout the interior of the hull. These separators keep damaged ships afloat by stopping incoming water in special compartments, thereby preventing the entire ship from sinking. Thus, the whole secret of why the ship does not sink even when damaged lies in the design of the correct hull by the engineers.
