Watermark Marine Construction, your trusted source for shorefront needs. Full Service Marine Contractor: Design, Permit, Construct. Watermark is a group of marine companies dedicated to quality products and service. We have everything you need to maximize your waterfront property, including marine construction, dock and shorefront accessories, navigation aids, and much more. Watermark Navigation Systems was founded in 1990 and is proud of our accomplishements and our customers' continuing support. Please enjoy our website and do not hesitate to ask questions.