A "shovelnose" hydroplane hull model based on plans (U-7 "Notre Dame") found on the internet. Well, it's just an approximation because OpenSCAD lacks some useful tools. Scale is 1:1 to paper plans for easier measuring so you should resize it when remixing. This is just a basic model of a hull, I'll add some extensions in a remix.
So here you have a solid STL rendered with
$fn=800 (most precise my laptop can handle) and original SCAD file so you can easily modify it or render it with better precision.