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Goat Island Skiff in Waves and Chop; Are Flat bottoms actually bad?
Discussion from long term Goat Island Skiff owners about sailing upwind in rough water and how the GIS handles it with Video evidence. They share some tips for sailing fast in rough conditions and reducing slap to next to nothing.
Hullform 9P Hull design software; Windows 11 Installation and Hydrostatics Guide
Hullform 9P is freeware Hull Design Software. It now appears to work on Windows 10 though it had problems for several years before. It is a full Professional Level Hull Design Package, but a bit simpler than many current programs.