New: the plans now include complete scantlings for foam sandwich (october 2007) our trawler 28 is a sturdy offshore trawler with a straight inboard diesel.. Proven boat designs, and how-to information for boat building. boat plans are for beginners and have been built by thousands since 1953.. This is the perfect dinghy for folks with larger boats. are you tired of moving heavy, traditional dinghies that weigh 200 pounds, or struggling with a limp, awkward.