Blocking Water in Submarine

Hi, Maybe someone can help me.
I've created a large sea with the Large Water component and it looks all nice, but the next thing I wanted to build is a Submarine.
I wanted this Submarine laying half in the water and when somebody is on board it will dive and take off into a Journey.
Here is my question, is there a way to block out the water projection in the Sub, because it looks silly when the Sub is half full of water.
Maybe there is a component for it or maybe it is not possible to create such scene?
Wodan
I've created a large sea with the Large Water component and it looks all nice, but the next thing I wanted to build is a Submarine.
I wanted this Submarine laying half in the water and when somebody is on board it will dive and take off into a Journey.
Here is my question, is there a way to block out the water projection in the Sub, because it looks silly when the Sub is half full of water.
Maybe there is a component for it or maybe it is not possible to create such scene?
Wodan