TT-Line advised the ATSB that it has commenced an in-depth review and analysis of berthing ships at Station Pier. This has included engaging external maritime consultants to conduct assessment, analysis and simulations of the mooring conditions and arrangements. The aim is to achieve recommendations on the optimal operating parameters including changes to berthing arrangements and infrastructure if necessary.
TT-Line also advised that the initial consultant’s mooring analysis report had verified the mathematical model used for computer simulations, which had confirmed the details and sequence of the incident. The ongoing analyses will define operational parameters and propose necessary changes to ship berthing arrangements and/or infrastructure.
In addition to these analyses, all mooring lines have been changed to the same type and specifications, with breaking load of 96 t.
TT-Line has updated and expanded procedures in relation to weather preparations and responses at Station Pier. This includes advising ships’ crews that all mooring lines are to be held on the winch brake, not in self-tension
The procedural review is ongoing and changes are to continue based upon the outcomes of the mooring investigations.
TT-Line advised the ATSB that it has improved the ship and company procedures and reliability of weather and associated warning notification.
The ATSB acknowledges the proactive safety taken by TT-Line, which has partially addressed the safety issue. The ATSB considers that the company’s mooring analysis, when completed, and safety action as a result of that analysis have the potential to adequately address the issue. Therefore, the ATSB has issued the following recommendation.