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D/L  Ratio is the displacement to length ratio.    This indicates if the boat is a heavy cruiser (results greater than 325) or a light displacement racing boat (results less than 200).

D / L = Displacement / ( 0.01 * LWL )3

Displacement is in long tons
  

    
1.  Enter the Length of Boat in Feet at Waterline (LWL): 
  
2.  Enter Displacement (Boat's Weight) in Pounds:
 - OR-
Enter Displacement (Boat's Weight) in Long Tons:
  


( Note:  A long ton is equal to 2240 lbs )
  

  Reference:  Rousmaniere, J,  The Annapolis Book of Seamanship  Simon & Schuster, New York, New York,  Chapter 1:  The boat p26-35, 1999.

 
  
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