The loft is very clean, much more than the other way which has many “stress lines” visible. Another benefit of NURBS curves, I guess.
By the way, I am familiar with how to use NURBS curves like this from double-ended boat design, where you want tangents between bow and stern.
P.S. I was referring to tangents visible in top view but here is an old video that demonstrates a way to get a “fair” NURBS curve and resulting hull cross-section by moving control points along intersecting tangents. The code generates a curve for half the shape using 4 control points, then is mirrored by a different cluster (X-section) to make the other half.
It’s too easy to forget all the details that make a clean loft…
GH code is here: Deadrise Hull Shape Cross-section in Rhino Grasshopper
Oops, sorry, that cluster is password-protected… Here is a version that you can inspect and edit without a password: deadrise_2021Oct04a.gh (33.0 KB)
I don’t remember how this version changed from 2015 when I wrote it. Code might be embarrassing now but who cares? 