Design & Engineering Standards

Marine Safety Center issues Ballast Water Management System Type Approval Certificate to RWO GmbH

The Coast Guard Marine Safety Center issued the 46th U.S. Coast Guard Ballast Water Management System Type Approval Certificate to RWO GmbH after a detailed review of the manufacturer’s type approval application determined the system met the requirements of 46 CFR 162.060. 

The treatment principle of the CleanBallast-Ocean Barrier System (CB-OBS) BWMS consists of filtration and electrochemical disinfection during ballasting and neutralization of residual active substances during deballasting. This approval covers 7 models with maximum treatment rated capacities between 500 m3/h and 3,000 m3/h.

A complete list of ballast water treatment systems that have been approved or have type approval applications currently under review can be found on the Marine Safety Center webpage at copies of all completed type approval certificates are also available. 

Please see this blog post for the most recent information on BWM compliance date extensions. Please send questions regarding the Coast Guard’s BWM extension program to

This blog is not a replacement or substitute for the formal posting of regulations and updates or existing processes for receiving formal feedback of the same. Links provided on this blog will direct the reader to official publications, such as the Federal Register, Homeport and the Code of Federal Regulations. These publications remain the official source for regulatory information published by the Coast Guard.

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