Big aircraft carriers weigh in at 110 thousand tons. I do not know of anything heavier.
Jahre Viking, crude oil tanker
The Nimitz Class U.S. Air Craft Carrier
They stay afloat the same way any ship stays afloat. The displacement of the vessel has to be less then the amount of water being displaced. The armaments have to be carefully planned to make sure that things don't get too heavy. And the balance and location have to considered as well, to make sure the ship doesn't roll over.
Simply put, White Star Lines had the largest ship afloat constructed for them, and they outfitted it with nothing but the best. That's why Titanic was so expensive.
The bouyancy of the vessel keeps it afloat. As long as the force of bouyancy is larger then the mass of the ship it will stay afloat.
When the ship sank I used a lifebelt to help me keep afloat.
A ship stays afloat on water due to the principle of buoyancy. The weight of the ship is displaced by an equal volume of water, creating an upward force called buoyancy that keeps the ship from sinking. The shape and design of the ship's hull help distribute the weight and control buoyancy to keep the ship stable and afloat.
A ship floats on water due to a principle known as buoyancy. The weight of the water displaced by the ship is equal to the weight of the ship, allowing it to stay afloat. Essentially, the buoyant force exerted by the water is greater than the weight of the ship, keeping it on the surface.
The ship was designed and built to stay afloat if four watertight compartments were breached, but the iceberg breached five compartments, so the ship couldn't stay afloat
The upwards thrust pushing on the hull keeps it afloat. As long as the hull is the right shape then it will always float no matter how heavy it is!
Big heavy steel ships can float on water because of a principle called buoyancy. The weight of the water displaced by the ship is greater than the weight of the ship itself, causing it to float. The shape of the ship's hull also plays a role in distributing the weight evenly, allowing it to stay afloat.
A ship stays afloat as long as the buoyant force pushing up on the ship's hull is greater than the force of gravity pulling the ship down. This buoyant force is generated by the displaced water and is proportional to the weight of the water the ship displaces.