Hull modeling issues

I am trying to create a 3d model of a bulk carrier. I begin by tracing the transverse section curves from the construction drawings. I fair the curves and then I create surfaces. I have some difficulties in the surface generation at the hull part close to the propeller. I need at least G1 continuity. Any ideas?curves.3dm (37.3 KB)

I believe you will have better luck if you break it up into separate surfaces then blend them together.
Do the hull first.
Then the surface comes down from the hull.
These two would be the primaries.
Then there will be a blend between these two surfaces.

When I have a moment I will try to illustrate.