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 Add the following relations to your Top Goals:

in which Error is a dimensionless SYS parameter. Run a solution for this parameter, Intpol_Rel_B will be calculated by Quaestor automatically because it is required by Error. Make sure you use the process manager to select the Ships object as dataset. For frame, enter 3.20 again.

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Editing relations was covered in tutorial 2. Remember that the use, syntax and examples of all quaestor functions are available in the wiki: functionsoverview.

  Run a solution for Error again at the same frame.

The error now turns out to be zero. This makes sense, as DQUAD is a quadratic interpolation method and this waterline is defined by a quadratic function as well.

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