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Accident Report Detail

Marine Accident Brief: Flooding of Dive Support Vessel Hammerhead

Executive Summary

​On March 7, 2016, at 1000 local time, the 164-foot-long dive support vessel Hammerhead was discovered partially flooded with an increased aft trim while moored alongside the pier at the Newport Marine Terminal in Galveston, Texas. The vessel was in a layup period with no one on board. There were no reports of pollution. Damage to the vessel was estimated at $900,000.

Probable Cause

​The National Transportation Safety Board determines that the probable cause of the engine room flooding of the dive support vessel Hammerhead was the localized corrosion of an aging hull structure resulting from the operating company’s lack of oversight and maintenance in preserving the hull’s metal plating with an adequate marine coating and cathodic protection system.

Accident Location: Galveston , TX USA Newport Marine Terminal, 29°18.05’ N, 094°50.07’ W
Accident Date: 3/7/2016
Accident ID: DCA16FM030

Date Adopted: 6/9/2017
NTSB Number: MAB1720
NTIS Number:  

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