Thanks jehardiman for that link. I'll take a look at that now.
Actually, I found a great video here where this woman explains it all very very well:
Many thanks to all of who have replied thus far. I do appreciate your time and expertise.
Let me give some more depth to my question....
Wondering can you help me with the John Teale book; How to design a boat.
In chapter 1 there's a section on Displacement Calculation. I...