Scene setup suggestion, lightning.

I have a scene with ocean all around and a offshore vessel that is moving (floating).. the cranes and equipment on the ship is also dynamic..
How should I set that scene up to get good lightning...
Earlier I could bake the ship as Static, and then just uncheck the static box, and still have baked lightmaps on the ship even it was moving.... this is not possible now.. because I cannot move object when checked as lightmap static...
I want the ship to be movable even if lightmap static is checked...

 

Why not move the ocean instead of the ship?

 

triton ocean, simulating movement on the ship, rolling, pitch and yaw. Then also the whole environment map must move.. The ship is moved by physx..

I will try to not iterative render the lightmap.. Maybe it sticks when I turn of lightmap static then..

 

You can try what Kuba suggests in this post: http://forum.unity3d.com/threads/gi-in-caves-interiors.277075/#post-1829140