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Safety Alerts and Bulletins Specific to Liquefied Gas as Fuel 
Mr. Scott Mercurio
USCG Marine Safety Alert 05-20  Subject: Electrical Issues Spark Major Concern – Addressing Hazardous Area Electrical Installations Knowledge Gaps.
Narrative:  The purpose of this Safety Alert is to emphasize the importance of properly installed and maintained listed or certified safe electrical equipment in hazardous areas in order to reduce the risk of fire or explosion onboard vessels. The Coast Guard has seen a number of instances where there was a lack of knowledge in the marine industry as it relates to the installation, training, maintenance and inspection of these certified systems.

Society for Gas Marine Fuel (SGMF) Formal Safety Notice (FSN) No: FSN 19-01 Subject: Prevention of LNG leakages from dry-disconnect/connect couplings.
Narrative: Differential movement between supply and receiving bunkering equipment is causing leakages at the dry-disconnect/connect coupling sealing face/surface.  It is not clear that and design loads are being exceeded shills this movement is occurring, however it is causing the coupling to leak.

* SGMF SGMF is recognized as the leading experts in the use and adoption of low flashpoint fuels for shipping and the ensuing supply infrastructure. This is where knowledge and best practice are gathered from the wide experience of our members which encompasses all the value chain for the fuel including producers, suppliers, owners, operators, port authorities and classification societies and equipment manufacturers, making SGMF the largest and best represented organization of its kind.

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LGC NCOE Field Notices specific to Liquefied Gas as Fuel


LGC NCOE Field Notice 02-16 (2016) Subject: Domestic Vessel LNG Fuel System Inspection Job Aid


Click Here to view bunkering related information.

Policy Letters specific to Liquefied Gas as Fuel

CG-MMC Policy Letter 01-21, (2021) Change-1 Guidance for Obtaining Endorsements for Basic and Advanced Endorsement for Low Flashpoint Fuels (IGF Code)

CG-MMC Policy Letter 01-21, (2021)  (Note change 1 above) Guidance for Obtaining Endorsements for Basic and Advanced Endorsement for Low Flashpoint Fuels (IGF Code)

CG-MMC Policy Letter 02-19, (2019)  Training of Personnel on Vessels Using Low Flashpoint Fuels

CG-ENG Policy Letter 01-12, Change-1 (2017)  Equivalency Determination - Design Criteria for Natural Gas Fuel Systems

CG-ENG Policy Letter 02-15 (2015)  Design Standards for U.S. Barges Intended to Carry Liquefied Natural Gas in Bulk

CG-521 Policy Letter 01-12 (2012)  Equivalency Determination - Design Criteria for Natural Gas Fuel Systems  
a.k.a. CG-ENG Policy Letter 01-12

CG-CVC Policy Letter 12-04 (2012)  Guidelines for Compliance and Enforcement of the Emission Control Areas Established within the United States Jurisdiction as Designated in MARPOL ANNEX VI Regulation 14

CG-CVC ECA Job Aid (2012)  Job Aid for Compliance and Enforcement of the Emission Control Areas    

Navigation and Vessel Inspection Circulars specific to Liquefied Gas as Fuel


Alternate Compliance Program (ACP) NVIC 02-95 (Change 3) (2018) :  The primary purpose of this change is to align the ACP with applicable International Maritime Organization(IMO) instruments, including the provisions of the International Code for Recognized Organizations (RO Code).

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Additional Guidance specific to Liquefied Gas as Fuel

Liquefied Natural Gas [ as fuel ] Design Considerations This technical paper, written by the design engineers at the U.S. Coast Guard Marine Safety Center, presents the major design considerations for a natural gas fueled ship that are fundamentally different from a diesel fueled vessel.

Alternate Compliance Program (ACP) Tactics, Techniques, and Procedures (TTP)  The ACP TTP (Change 3) - Dec 2019 consolidates, updates, and standardizes guidance for United States Coast Guard (USCG) personnel conducting Alternate Compliance Program (ACP) examinations. 

IMO IGF Code (2017)  Read about the International Code of Safety for Ships Using Gases or Other Low-flashpoint Fuels (IGF Code) on the IMO website.

IMO Resolution MSC.285(86) (2009) Interim Guidelines on Safety for Natural Gas-Fueled Engine Installations in Ships (2009)

USCG Marine Safety Manual, Vol. II Materiel Inspection Section D, Chapter 6, Procedures Applicable to Foreign Tank Vessels


Additional Guidance specific to Methanol as Fuel

IMO MSC.1/Circ. 1621 (2020) Interim Guidelines on Safety of Ships Using Methyl/Ethyl Alcohol as Fuel (2020)


Additional Guidance specific to Hydrogen Fuel Cells

IMO MSC.1/Circ. 1647 (2022) Interim Guidelines on Safety of Ships Using Fuel Cell Power Installations (2022)


Code of Federal Regulations

33 CFR Part 101 - Maritime Security: General

33 CFR Part 103 - Maritime Security: Area Maritime Security

33 CFR Part 104 - Maritime Security: Vessels

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U.S. Code USC Title 46 - Shipping

46 United States Code, Section 3711-Evidence of Compliance by Foreign Vessels

46 United States Code, Section 701 – Port Security

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