Spikes and negative trends in displacement curves
I have noticed some negative spikes in displacement/volume curves for appendages when the waterplane reaches very near to the top of the appendage.
All these appendages have tumble home. This may be significant, though two other sections with very similar tumble home had no spike at the chosen depth increment.
I repeated the runs with finer depth increment and the spikes are there. In some cases multiple spikes, all very near to the top of the appendage
There are also cases where there are several negative spikes and some draught ranges with a general negative change in calculated volume with increasing draught.
These appendages (with the general negative trend)are admittedly oddly shaped, and I suspect that the algorithm is interpolating badly in these areas.