Manly Marine is a member of Advanced Marine Technologies group of marine companies along with Diamond Sea Glaze, Freeman Marine, Pacific Coast Marine and Steelhead Marine. Learn more at www.AdvancedMarineTechnologies.com. Manly Marine manufactures the best water and air-tight closure systems available. Our products, proven in fleet and shipyard, are specified by designers and refitters who want absolute performance, safety and security. Manly Marine manufactures to industry standards, as well as applying those standards to custom designs developed by the company itself or supplied by the client. Today, Manly doors, windows and hatches are a standard in the industry, carrying forward the tradition of innovation and high quality. They are relied upon by conscientious builders of workboats, tugs, fishing vessels, freighters, tankers, passenger vessels and ferries. Make every aspect of your construction a sure thing - specify Manly Marine Closures.