How can you appreciate the technology of making ships float, using the material which sink in water ?

Explanation

1. we know that a piece of iron sinks in water.
2. The relative density of iron is 8.5 which is many times more than water.
3. A ship that floats on water is made up tonnes of iron. It is really wonderful.
4. According to the Archimedes principle of buoyancy any object can float when its weight is equal to the weight of water displaced by it.
5. Hence ships are made with a larger surface area so that it displaces the water, whose weight is equal to the weight of loaded ship.
6. It involves very sharp scientific calculations and a large engineering technology.
7. Really such type of technologies are highly appreciable and the scientists who formulates all these are also really great.