Marine safety issues and actions

Joining shackle locking pin effectiveness

Issue number: MO-2012-001-SI-02
Who it affects: Ships berthed at the inner moorings at Christmas Island
Issue owner: Patrick
Operation affected: Marine: Shore-based operations
Background: Investigation Report 292-MO-2012-001
Date: 23 May 2013

Safety issue description

The port operator was aware that the type of locking pin arrangement on the cantilever line joining shackle was not effective in preventing the shackle’s pin from working its way free. However, the operator had not implemented a program of replacing the shackles in the entire mooring system in Flying Fish Cove with new shackles that had a more robust locking pin arrangement.

Proactive Action

Action organisation: Christmas Island Port
Action number: MO-2012-001-NSA-002
Date: 23 May 2013
Action status: Closed

The port operator is in the process of replacing the mooring equipment including the anchors, dumpers, chains and shackles. These works are scheduled to be completed in May 2013.

ATSB response:

The ATSB is satisfied that the action taken adequately addresses this safety issue.

Current issue status: Adequately addressed
Status justification: The replacement of the underwater mooring components will result in the replacement of all shackles with shackles with a more robust locking arrangement.
Last update 08 January 2014