
After Perpendicular
After Perpendicular is a vertical reference line on a ship's sternpost, which is used as a reference point for taking measurements of length and beam. It is located at the intersection of the sternpost and the waterline. The After Perpendicular is an important reference point for shipbuilders and naval architects, as it is used to determine the ship's overall dimensions and displacement. It is also used to calculate the position of the ship's center of gravity, which is important for stability calculations. The term 'After Perpendicular' is derived from the fact that it is located aft of the ship's perpendicular, which is a vertical line passing through the intersection of the ship's waterline and the forward-most point of the hull.
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