I think I need some help with this one.
I have a plane whose geometry deforms over time. This is my "water". (there is no displacement map)
I have a small boat that must stay on top of the water as it is deforming.
I set the "water" as "Static Fluidsurface". I didn't change any other settings on the water.
I set the boat as "Dynamic Object". Density is ".3". "Use Group Density" is ON. The boat model itself has several groups whose density is set to the lowest possible (.0001) and there is a "Bow" group - the front part of the boat - whose density is set to "20".

When I simulate Newton, the back of the boat always sinks half way and the bow raises up into the air and flips over so the boat is upside down. How can I keep my boat right side up?

Hmmm, I don't think this is the right application for Newton. I place a sphere in my chor and simulated and after awhile the sphere doesn't match the movement of the mesh at all. It seems Static Fluidsurface isn't supposed to be used with a deforming mesh.

Must where that "static" part came from.

Please open a bugreport (private) and submit the chor (simply as possible offcourse).
I will look , what I can do to get this to work, maybe adding a "Dynamic Fluidsurface" :-)

Hmmm, well, in the simple project I created, it works perfectly with both a static, non-moving plane and with a plane that morphs over time. The boat behaves exactly as it should. It bobbs on top of the water and does not turn upside down.
Since I cannot reproduce my problem, I guess I will not file a bug report right now.

If anyone wants to see a nice example of a perfectly functioning Static Fluidsurface, you can check out the project file below.

Looks good to me.
CHEERS!