This is a guess, but I think the fr-ratio is tied to the origin of the polar coordinates used by the operational features of the boat, not the 3D model.
This is not unusual in a sim to have 2, or even 3 models that overlap. For example
1. 3D model
2. Physics model
3. Damage model
Haven't been modding long enough to have even a decent understanding of how all 3 tie together.
Some other things give you wierd results. I was playing with the U/D drag on the surface and increasing the drag caused the bow to start climbing higher in the water as the speed increases.
I have a feeling the dev's haven't touched this boat in the water issue because it will require modifying stuff all over the place.
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"There are only two types of ships- submarines...... and targets" Unknown
"you wouldn't catch me on a ship that deliberately sinks itself"- comment to me from a surface sailor. 
System:
AMD 6300 3.5 GHz | 32GB DDR3 | SATA 300 320GB HD, SATA III 1TB HD, SATA III 1.TB HD | ASUS Sonar DS sound card
NVIDIA 1660 Super OC | Windows 10
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