Ship’s Displacement

You could consider something similar to a ship is more dense than water, after all,it is constructed of metal which is for certain more dense than water, but, the ship is filled with air, which is much less dense than water, and compensates the difference.

That’s how come, when a ship gets a hole in it, it sinks. The water pushes out all the air and makes the entire density of the ship bigger. When the water, metal, and air inside the ship become more dense than the water outside the ship, the ship will sink.