a slamming - resistant sonar dome canoe is provided herein . the canoe generally consists of a shell , e . g ., of fiberglass - reinforced plastic e . g ., polyester resin with an extensive internal reinforcement of plastic foam , e . g ., epoxy foam in the bottom of the canoe , buttressed by an additional but simple lightweight metal framework e . g ., steel or aluminum at the mounting flanges and in the upper portion of the canoe interior and preferably bonded thereto by the thermosetting polyester resin . this sonar dome canoe achieves the conflicting requirements for light weight and robustness in a canoe used in a slamming environment .