Knuckle Line
In naval architecture, the knuckle line is the line that marks the intersection between the side and the deck of a ship. It is the point where the curvature of the ship's hull meets the flat surface of the deck. The knuckle line is an important design feature as it affects the ship's stability, speed, and maneuverability. A sharp knuckle line can reduce drag and improve speed, while a rounded knuckle line can improve stability and maneuverability in rough seas. The knuckle line is also used as a reference point for measuring the height of the ship's superstructure and other structures on the deck.
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