Boat plans for the 15 "i finally finish my 15′ dinghy from your plans. today, my son and i took the dingy out on her first main voyage.. 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. All power boats 16′ long and under. tech support. the best technical support: we will help you succeed! all our plans and kits come with full technical support..