Recent Blogs
Floating Dry-dock: Ballast, Buoyancy and Ship Support | FIRGELLI
Learn how a floating dry-dock lifts a supported vessel. Distinguish displaced-water volume from ballast pump-out volume using a clear buoyancy example.
Great-Curve Delineator: Arc Radius and Rise Calculator | FIRGELLI
Explore a constant-angle circular arc. Calculate radius, sagitta, rail angle and apex-rise change from chord length and half central angle.
Sloop Yawl Rig and Selected Balance Calculator
See a sloop-yawl rig with jib, gaff main and stern lug sail. Compare selected centers of effort, lateral resistance and waterline length.