 The Marathon Boat Group, a company of former Grumman managers and investors, reintroduced production of the Sport Boat with sheathed flotation under the gunwales to comply with the level-flotation rule.Originally, the Sport Boat featured twin sets of oarlock sockets, but the current version has only one, and the sheathed flotation makes retrofitting the second set difficult.Marathon continues to make the Sport Boat and other Grumman canoes, and in 2000 acquired rights to use the Grumman name and logo.