A ship won't sink if the density of the ship (metal, wood, cargo, any included air) is less than the density of water.
It's possible that a ship of steel will not sink as well. But if it will sink, it would be because the density of steel is greater then the density of water, while air's density is lower then water's.
A stone has a greater density than water; a ship, less.
A loaded ship is going to sink into the water more,causing water to displace..
If a ship has no buoyancy, then it will sink. In the tragedy of the RMS Titanic, the ship sank due to a collision with an iceberg, which ripped through the underside of the boat. Also the fact that they were going at an incredibly slow speed.
due to Archimedes principle
a hole.
The air (within the ship) is less dense than water.,
The salt makes the water dense and the object must be heavier like metal or a ship to sink.
The ship will sink slightly. Salt water is denser there for heavy objects will float more in it. When the ship goes back to fresh water the density decreases and the ship lowers again. This link gives extra information and some simple experiments for you to try at home. http://www.kidsgen.com/school_projects/how_ships_float.htm
Ships don't sink in the ocean because the air pressure pushes the ship upward and keeps it buoyant-------------------------------- Ships don't sink because the overall density of the ship is lower than the density of the salt water and it displaces its weight's equivalent of water using only a portion of the ship's volume.
To purposely sink a ship is to 'scuttle' the ship.