The utility is a practical boat ideal for fishing or water sport use. the lightweight hull is easily transported and can be car-topped. the generous beam provides. Updated: march 4, 2017. added the simple duckboat to the plans page. (free) added a new coro boat to the builders project page by justin jefferys of australia.. This is the extraordinary moment a businessman was winched to safety after clinging to his fishing boat’s upturned hull for nine hours in the english channel..