ROUTER™ ...
predicts sail performance using weather history over a specified course

Router takes a boat’s polars and combines them with a historical or predicted weather file and races the boat between the start and fiinish of a leg. Changes can be made to the boat’s configuration allowing North designers to predict the fastest configuration for a specific race. This tool was initially developed by Michael Richelson of North Sails for the Illbruck Volvo Ocean Race Team.
Router allows North designers to predict the effect of specific sail, rig and stability adjustments without VPP data by using a boat's rating to back-calculate hull forces.© North Sails