TVIB News MSIB-Marine Safety Information Bulletin

MSIB – Acceptable U.S. Ballast Water Management Methods vs. BWM Convention Methods


The U.S. Coast published MSCI No.: 007-17 Acceptable U.S. Ballast Water Management Methods vs. BWM Convention Methods.

The purpose of this bulletin is to remind masters, owners/operators, agents and persons-in-charge of vessels that the United States is not signatory to the International Convention for the Control and Management of Ship’s Ballast Water and Sediment (BWM Convention) and that vessels discharging ballast water (BW) into the waters of the U.S. must comply with the requirements of 33 CFR 151 Subparts C and D.

Non-recreational vessels, U.S. and foreign, that are equipped with ballast tanks are required to comply with the U.S. ballast water regulations provided in Title 33 Code of Federal Regulations (CFR) Part 151 Subparts C & D when operating in the waters of the United States, except as expressly provided in 33 CFR 151.2015 & 151.2020.

Click here to download MSIB 007-17 in full.

MSIB-Vapor Pressure Relief Valve Testing on Pneumatic Systems

Excerpt from MSIB Number 004-17 published 03/07/2017

Due to a mishap from improper testing of a vapor safety relief valve on a compressed air system, the Coast Guard Office of Commercial Vessel Compliance (CG-CVC) reminds all those concerned of the risks and best practices in conducting or witnessing the testing of relief valves. While this information is based on testing compressed air systems using vapor relief valves, the guidance is also relevant to safety valves in other pressure systems, except boilers.

Click here to review and download the full document.