Hullspeed will check that the entered data is within the valid ranges for the selected methods. If the values are okay they will be displayed in black, if they are too low they will be displayed in red with the words (low), and if they are too high they will be displayed in orange with the word (high).

Hullspeed will still attempt to calculate the hull resistance if the data is out of range, but these results should be treated with caution since the accuracy of the method may be compromised if parameters are outside the valid range.

Because of the difficulty of accurately determining some measurements from the surface model, it is important to verify the following measurements:

§   1/2 angle of entrance

§   Bulb transverse area

§   Bulb height from keel

§   Deadrise at 50% LWL

§   Chine type: hard chine or round bilge

Also see: Data Validation on page 17 for more information on data validation