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Monitoring Weather Conditions and Forecasts

Dec. 1, 2025 | By Nathan Cowall, NOSAC Alternate Designated Federal Officer, Office of Operating and Environmental Standards (OES)

The U.S. Coast Guard Office of Operating and Environmental Standards (CG-OES) has released a new Marine Safety Information Bulletin (MSIB) which provides vessel owners, operators and crews with guidance on available sources for marine weather information. The MSIB encourages owners, operators and crews to evaluate all available means to monitor marine weather conditions and forecasts to determine the best course of action for their vessels and their intended routes. The MSIB further aims to encourage owners and operators to implement or update guidance for how frequently a vessel master should check weather conditions and forecasts before and during transits.

For more detailed information, the MSIB is available electronically on the Deputy Commandant for Operations website. Questions can be directed to the Coast Guard Office of Operating and Environmental Standards at HQS-SMB-CG-OES@uscg.mil.

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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.