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NTSB RIN: 3147-AA30 Publication ID: 2026 
Title: Coast Guard-National Transportation Safety Board Marine Casualty Investigations: Major Marine Casualty Property Damage Threshold 
Abstract:

The Coast Guard and the National Transportation Safety Board (NTSB) are jointly amending the monetary property damage threshold amount for reporting a major marine casualty. The current amount no longer accurately reflects the level of significance for a major marine casualty justifying an independent investigation by the NTSB. Additionally, this change will standardize the definition of a major marine casualty throughout the Code of Federal Regulations, eliminating confusion for the public and regulators caused by multiple definitions for the term.

 
Agency: National Transportation Safety Board(NTSB)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 49 CFR 850.5(e)(3)    46 CFR 4.40-5(d)(3)   
Legal Authority: 49 U.S.C. 1131   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/00/2026 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Related RINs: Related to 1625-AD02  Related Agencies: Joint: DHS/USCG; 
Agency Contact:
William T. McMurrry, Jr.
General Counsel
National Transportation Safety Board
490 L'Enfant Plaza East SW,
Washington, DC 20594
Phone:202 314-6080
Email: rulemaking@ntsb.gov