Holtrop is a method based on statistical regression of model tests and results from ship trials. The method is used to estimate the resistance of displacement ships. The database covers a wide range of ships. For extreme shapes, the accuracy of the estimates is not good. The method may be used to assess qualitatively the resistance of a ship design. MoreDeveloped by: Jefferson Flor, Thiago Gabriel Monteiro, Henrique M. Gaspar (A ShipLab web app.