Different diving positions.

There are four main types of diving positions. Layout, pike, tuck and free. Layout, pike and tuck are more controlled or should be more controlled when your in the air. All three of these positions are used in every dive, in various ways and combinations. Free position is when a diver turn on an angle in the air. So, basically "twisty" dives.
All of these positions have different difficulty levels. In competitions having the higher level positions in your dive is a really good thing, it can take a simple back dive, to a back dive with a half twist (twist are the highest). Yes, even just twisting half way can bring the difficulty way way up.
From highest to lowest difficulty, free position is the hardest to do, that's why it has the highest rated difficulty. Pike would be the second. Tuck would be the third. Layout, is the easiest and it's the first thing you really learn. You probably won't need to learn it because it just a pencil jump.
If your confused about how to do any of these positions, don't worry my next blog will be on how to do them . :)