I don’t know the exact origin of the Butterfly Chest Scull but I credit Gnarly Dog with introducing me to it through his video “Rolling with Sitka”. It is a great transition roll to help people learn how to complete forward finishing paddle rolls. The buoyancy provided by the paddle held parallel to the kayak is substantial. When you have this scull working you can graduate to the forward finishing butterfly roll and complete the revolution.
You can view the video and tutorial here.
