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• Make sure Intpol_Rel_B is dimensionless and determined by SYS: System/Equation.  

The syntax of every intrinsic function in Quaestor is described in this documentation, see the functions overview. The syntax above means the following.

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• Change the number of decimals to 4 for Error, Intpol_Rel_B and Rel_B to 4.
• Change the relation (find the relation and press F2) for Intpol_Rel_B  to

Intpol_Rel_B = DQUAD(@Hull, 2, @Frame, @Rel_B, Frame)

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First, take a look at the arguments after Hull. Data within the object Hull  will be used in the integration, but yet it only contains dimensionless frame numbers and dimensionless widths. By putting (@X, @B_Frame, Lpp, B) behind it, you ask Quaestor to calculate X and B_Frame using data from within Hull, using Lpp and B from outside Hull and add all these parameters to the object Hull. You do actually use the object Hull as a function to calculate other parameters. This is a very powerful ability of Quaestor (see also QuaestorSyntax).

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If the object Hull in the solution is now opened again, you'll see that, like for the waterplane area, the columns X and B3_Frame are added to the object, whose values are calculated for every case of Frame and Rel_B within Hull. Note that the parameter B_Frame is also added, as it is used to calculate B3_Frame. Again, only the values of the last ship (last input case) are stored in the object.             

6    Comparing the stability to other ships

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