The Seawind 300C was intended to be the certified production version, derived from the kit-built Seawind 3000. It incorporated many changes required to conform to the certification standards. The company indicated that certification flight testing would continue after the crash of the prototype on August 16, 2007, but did not actually resume until early 2010. Certification flight testing continued through the summer and autumn of 2011, but by the end of 2020 the company website had been taken down and the company seems to have ceased business.