TVIB News Caleb King

USCG: MSA – GAS FIRE SUPPRESSION SYSTEMS ON VESSELS

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The Coast Guard has issued Marine Safety Alert 12-25 highlighting a recurring and dangerous issue involving fixed gas fire extinguishing systems aboard vessels. On multiple occasions, the Coast Guard has discovered the safety pins being left in place after servicing, which prevents the system from being activated during an emergency.

Understanding the Issue:

• SAFETY PIN – Used during maintenance to prevent accidental discharge. Must be removed after servicing for the system to operate.
• RETAINING COTTER PIN – Holds the manual activation pull cable in place. Must remain installed for manual operation.

Confusing the two pins or failing to remove the safety pin can leave a vessel vulnerable in a fire emergency.

The Coast Guard’s Marine Safety Alert includes eight (8) strong recommendations for vessel owners and operators. The Coast Guard cites two specific incident examples in the Marine Safety Alert, which was issued May 12, 2025.

Fire suppression systems are only as effective as their readiness. Taking a proactive role in system maintenance can help ensure these systems are ready in case of an emergency.

 Click here to download a copy of Marine Safety Alert 12-25.

TVIB FAQ – General Alarm Requirements – Subchapter M

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Where should audible and visual general alarm devices be positioned onboard Subchapter M towing vessels? 

We’ve published a new FAQ that explores the general alarm requirements under 46 CFR 143.235 and offers clear guidance on proper placement of alarms and supplemental flashing red lights. This resource includes helpful regulatory text and practical considerations for auditors, surveyors, and vessel operators. 

Take a few minutes to review the full FAQ to ensure your vessels meet all compliance expectations. 

Find Detailed Guidance in Our FAQ
For comprehensive answers and guidance visit the FAQ section on our website: TVIB FAQ. Use the search function with the term “general alarm” or navigate to 46 CFR Part 143 for relevant details. 

Coast Guard Publishes MSA for Fire Detection Systems

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Coast Guard Headquarters has published a Marine Safety Alert (MSA) covering fire detection systems on Subchapter M towing vessels. This MSA provides vessel owners/operators excellent information and considerations for those using non-Coast Guard approved systems and Coast Guard type-approved systems.  

Click here to download MSA 13-25 – Nationally Recognized Testing Laboratory Listed Fire Detection Systems