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Safety Alert

Date 23 September 2026

Hidden Hazards Created by Systemic Failures in Gas Detection Practices

The U.S. Coast Guard (USCG) has issued Marine Safety Alert 13-26 highlighting the importance of the proper operation and maintenance of gas detection instruments, as well as crew familiarity with their use, to assess atmospheric conditions in cargo and enclosed spaces.

USCG inspectors frequently identify deficiencies related to atmosphere testing and gas detection on bulk carriers transporting gas-emitting cargoes, such as coal. Common issues include missing, expired, or unsuitable calibration gas; overdue, poorly maintained, or non-functional gas detection instruments; ships’ officers who are unable to demonstrate proper calibration and bump-test procedures in accordance with the manufacturer’s instructions; and incorrect regulators or delivery hardware. These deficiencies indicate that gas detection systems may not be properly maintained or effectively used to monitor cargo-related hazards.

The USCG recommends that owners, operators, Masters, and crew members verify the suitability and availability of calibration gas; use the correct regulators and delivery hardware as specified by the instrument manufacturer; incorporate the manufacturer’s instructions into the SMS; provide hands-on crew training; and conduct a pre-load and pre-operation verification to confirm that the gas detection equipment is operational and calibrated prior to loading cargoes that may emit flammable or toxic gases.

Safety Alert

Hidden Hazards Created by Systemic Failures in Gas Detection Practices

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