Ineffective mooring configuration causes shift at berth

Preventative actions with a view to preventing recurrence

A large crude carrier berthed at a loading terminal, deploying two headlines, four breastlines, two backsprings forward and two sternlines, four breastlines, two backsprings aft, as recommended by the pilot. After loading commenced, moorings were regularly tended to by ship’s staff.

However, the following evening, the terminal suspended loading, stating that the vessel had moved position forward by 2.5 metres. The vessel contested this claim, estimating that the movement did not exceed a metre. Nevertheless, the crew immediately repositioned the vessel to the satisfaction of the terminal and loading was resumed.

Root cause/contributory factors

1. Inappropriate advice on moorings configuration by berthing pilot that was not in accordance with published guidelines which recommended a 3-2-2 configuration of mooring lines fore and aft;
2. Location of the shore fittings (quick-release hooks) was such that the after breastlines led ahead, acting like additional after backsprings;
3. Uneven distribution of forces caused the vessel to move ahead during loading.

Corrective actions

1. Vessel was repositioned immediately by ship’s staff to the terminal’s satisfaction;
2. A prominent reference mark was secured on the ship’s rail and the correct position of the ship at the berth was closely and continuously monitored;
3. Master and chief officer held a meeting with all deck officers and crew to discuss the near-miss incidents.

Preventative actions/recommendations:

Fleet has been advised to:

1. Fully discuss proposed mooring arrangements with the terminal or Mooring Master; notify them of concerns about any unacceptable mooring pattern and promptly advise shore management of the problem;
2. Affix a reference mark on the hose rail in consultation with the terminal once the ship is safely moored;
3. Closely monitor ship’s position and prevent lateral movement of ship by continuously noting the position of this mark in relation to Chiksans (hoists) and shore equipment;
4. Conduct additional training sessions onboard in correct mooring practices with the aid of audio-visual training programs, reference to SMS Manual and OCIMF publications;
5. Note and discuss this near miss report and implement the preventative actions with a view to preventing recurrence.

Source: Mars/Nautical Institute