How do you find lbp of ship from loa?

To find the length between perpendiculars (LBP) of a ship from its length overall (LOA), you typically use a standard ratio or formula based on the ship’s design. A common approach is to apply a percentage of LOA, as LBP generally ranges from 80% to 95% of LOA, depending on the vessel type and design. You can also refer to specific naval architecture guidelines or industry standards for more accurate calculations based on the ship's intended use and hull shape.