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•     Lpp: Length between perpendiculars
  
  
•     B: Moulded breadth
  
  
•     T: Draught from keel to Construction Water Line
  
   In the Knowledge browser  Top Goals/Undefined and select new Class (Ctrl+N). Provide the class with the name Main Dimensions. Note that the input box will already contain the word "Goals". To make a new class, delete Goals and write your class name (in this case Main Dimensions). Sub classes can be defined by adding the main class with sub classes separated by points: Goals.Sub goal

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We'll add two relations, one for salt water and one for fresh water.

  Select Top Goals/Undefined in the knowledge browser,  in the right hand side and select New Relation (Ctrl+N). In the upper part of the new window, delete any proposal (Quaestor may have filled in the last selected parameter), and enter

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The two relations for the density of the water are only valid for their corresponding watertype. Therefore, a constraint is added to each relation. A constraint is simply a restriction for the validity of the relation.

  Double click Top Goals/Undefined in the knowledge browser: all relations in that class are shown (this will work for any class). One can always edit a relation by selecting it and pressing F2 (or  and select edit). This is also a useful method to find out which relation you actually selected.

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