Scroll down this page for many more plans. this a page of links to some favourite free boat plans at intheboatshed.net. they’ve been chosen because they are derived. A glen-l study plan is intended to give you a detailed overview of the design you are contemplating and help you decide if this is the boat you wish to build. There is a smattering of info i’ve found on the net about the chinese yuloh, the japanese ro, the bahamian sculling oar and single oar propulsion in general..