Analysis of an engine flooding incident resulting in
constructive total loss of an ASD tug
On 10th October 2015, during oil rig operation, ASD
tug came into contact with the oil rig which caused the engine to be flooded
with subsequent foundering and final sinking of the tug boat.
Details of the incident
During oil rig operation on above date, ASD tug boat encountered
heavy weather despite of received update weather report from concerned parties
well in advance and used inadequate length of towing wire, consequently caused
the master to be unable to control the vessel properly, which the ASD’s hull came
in contact with hanging anchor of the oil rig.
Water began to enter the engine room through a side rupture
approximately 50x7 cm, a bilge pump used by engineers but it was unable to stem
the flow, and ship’s engine room was evacuated after black out which happened due
to raise of water level.
Apparently the crew did not tackle the emergency situation as
effectively as it was required. Later on nearby divers were able to bring the
flooding under control for few hours but as the vessel was dead on black out
situation in rough sea, eventually the vessel was sunk without any loss of
Causes of the incident
Although limited information was available, but below results
could be consider:
- Master was not able to judge efficiently, the weather situation,
according to the weather forecast received well in advance.
-Master who was in charge of operation was not able to maneuver
the vessel professionally in heavy weather.
- A risk assessment plan had not been completed prior to work
commencement as stated, including basic contingency preparations.
-On board training or drills had not been completed, which hampered
the crew’s ability to respond any emergencies effectively to prevent flooding
of ASD tug.
-No effective safety management system was adopted on board the vessel.
-The application of safety management system across the off
shore fleet vessels to be improved.
-The quality and standard of manning policy for off shore fleet
vessels to be improved.