The Duffy 31 was designed by Spencer Lincoln in 1983. Her hull lines closely follow those of her larger sister the Duffy 35. The Duffy 31 is a built down, semi-displacement hull with a fine forefoot and flat after section. She has the tumblehome and sweet sheer shared by all the Duffy’s. Her original design as a commercial lobster boat made sea-keeping the top priority in her design. Over the years we have built over fifty Duffy 31’s and they can be found lobstering all over the east coast.