Under normal circumstances, water is an incompressible fluid, meaning its density and volume do not change with applied pressure or force. When a finite body is placed in water, two things happen:
- The body exerts or imparts a force on the water medium by virtue of its weight.
- The body tends to displacea certain volume of water with which it is directly interacting.
These two phenomena are the basis for all our explanations.
When the first happens,...
https://www.marineinsight.com/naval-architecture/displacement-of-a-ship/