This is an overview of the boat's lines.
![](http://riverswest-forums.266.s1.nabble.com/file/n591/Capture1.jpg)
This is the cutting pattern from Hannu's website.
![](http://riverswest-forums.266.s1.nabble.com/file/n591/Capture_2.jpg)
This is the plank pattern. Notice that the cuts are straight line cuts, the same as the Salt Bay.
![](http://riverswest-forums.266.s1.nabble.com/file/n591/Capture_3.jpg)
But this is how a marine CAD program translates his table of offsets. Notice how ragged the lines for the upper and lower edges of the plank are.
![](http://riverswest-forums.266.s1.nabble.com/file/n591/Capture_4.jpg)
Clearly, there are errors in the offsets that need to be fixed before the boat can be lofted.
Accurate offsets enables an accurate lofting, which enables accurate construction drawings, which means little grief in the assembly process, because all the problems have been foreseen and solved on paper instead of dealing with them as they arise on the building frame.