From the blog "Digital Flight Control System for Foiling Dinghies"

Ok team, here goes my first blog post.  My goal here is to build a Digital Flight Control System (DFCS) for my UFO using a sonar range sensor as opposed to the wand.  The design needs to completely mimic the performance of the wand system currently in the boat.  The system needs to be fully removable to allow for One Design Racing if desired.   A few design guidelines... Improvements to current control system: 1) Sensing wave terrain out ahead of the boat 2) Not engaging the