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11/3/2017: Marine Safety Center issues amended Ballast Water Management System Type Approval Certificate to Optimarin AS

The Coast Guard Marine Safety Center has issued an updated type approval certificate to Optimarin AS for the Optimarin OBS/OBS Ex Ballast Water Management System. The updated certificate was issued to authorize the OBS Ex model for installation in hazardous locations on U.S. vessels, based on demonstrated compliance with 46 CFR 111.105. A copy of the type approval certificate may be obtained by contacting the manufacturer.

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.

The Coast Guard’s ballast water portal provides information on BWM compliance date extensions. The site also provides access to regulations, policy letters, informational bulletins, and extension application status to help the maritime industry comply with the BWM requirements.

Please send requests for compliance extension and 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 source documents, such as the Federal Register, Homeport and the Code of Federal Regulations. These documents remain the official source for regulatory information published by the Coast Guard.

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