Design, computer lofting, and kits for welded aluminum boats. specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kit company.. Comments about west marine rib-350 double floor hypalon inflatable boat, gray: so far so good . i have only had the rib-350 a few weeks . i like the way the hull is. Fast cat: orange county’s best zodiac boat whale watching adventure.