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CG-ENG Policy Letter for Ship-to-Ship Transfer of Hazardous Materials Other Than Oil

May 13, 2024 | By CG-ENG

On 7 May 2024, the U.S. Coast Guard Office of Design and Engineering Standards (CG-ENG) published Policy Letter 02-24, Guidance on Commandant Approval of Lightering and Ship to Ship Transfer Operations Involving Hazardous Materials Other Than Oil. 

Vessels conducting ship-to-ship (STS) transfers of liquefied natural gas and other hazardous materials outside the baseline are required to seek Commandant (COMDT) approval concurrent with local COTP approval to conduct these STS operations. CG-ENG has been evaluating and approving these requests before referring the vessels to the local COTP for final approval, which has added time and additional paperwork to the process.

This Policy Letter outlines the procedure for COMDT acceptance of the STS transfer prior to COTP concurrence. Vessels wishing to conduct STS transfers outside the baseline should follow the procedure outlined in the Policy Letter.

The full text of the policy letter can be found on CG-ENG’s policy website: CG-ENG Policy (

Any questions or feedback related to this Policy Letter should be directed to CG-ENG at

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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.