Creating Mesh for double body
 

Hello, I'm new at OF and I'm trying to create a mesh for double body flow. The problem is I've got a stl-file with two solids. Once the solid for the submerged part of the ship and on the other hand the solid for the area above the waterline. For double body flow I only need the submerged solid, Creating a symmetry plane at waterline area to avoid influence of the free surface. Is it possible to create a block mesh that only depends on the draught?

Happy if you could help me.