Problem baking Lightmap, especially Ambient Occlusion

Unity Engine
1

Hello

First of all, Iam pretty unexperienced working with Unity. I set up a scene, used a FBX Shipmodel and Water4 prefab and 2 Directional Lights and the Metaio SDK. Now i want to bake all the lights, including Ambient Occlusion, into Lightmaps. Worked pretty well, but unfortunately it seems to be the AO is not baked well, it seems off in some sections.

Here is the Link to the screenshots:

[Album] Lighting Problem/Baking Problem

Using Unity5.0.1f Personal.

Thanks in advance.

2

bump