The above lines can be created by importing the script file Read ship offset data from Excel.js. This file refers to the spread sheet ship_offset_table_formats.xls Make sure you edit the path in the script file to match the location of your local copy of the spreadsheet.

	This script defines poly-curves fitted to the points (x,y,z) as given in the spreadsheet. This means that close to knuckles there will be a smooth line and not a sharp angle. It is thus necessary to manually define knuckle points by using the divide function for the lines.
	Knuckle intersections have been inserted as shown for the respective poly-curves.
	Additional poly-curves have been inserted to use the curve net interpolation.