Comments from the report:The DPO, though experienced, was new to the vessel and the DP system. He had undergone familiarisation of the system but misinterpreted 30o heading increment as being […]
DP Event Bulletins
DP station keeping event bulletins enhance the traditional reporting and analysis of dynamic positioning station keeping events and incidents. They ensure that the industry is provided with prompt feedback, including anonymous factual event trees of events reported to IMCA.
Individual DP events are available individually online, tagged and searchable, while the traditional PDF collections are also available for download.
Submit a Report
All members are encouraged to contribute relevant DP information by using our reporting template which is available under Submit a Report where you will also see details on how to submit your information.
IMCA Contact
Andy Goldsmith
Technical Adviser - Marine
Contact
DP Events
Inadequate Position Reference Systems Caused DP Incident
Comments from the report:It is mentioned in the report that task appropriate mode (TAM) and activity specific operating guidelines (ASOG) were in use, with the limitation identified for 2 DGNSS […]
Lack of Experience in Dealing with Environmental Conditions Caused Loss of Position
Case narrative:A DP 2 vessel with two redundant groups and operating in open bus mode, was involved in drilling operations in water depths of approximately 38 metres. The vessel was […]
DP Emergency Drill Scenario
4 DP Emergency Drill Scenario DP emergency drill scenarios are included to assist DP vessel management and DPOs / Engineers and ETOs to conduct DP drills onboard. The intent is […]
Loss of gyro input causes loss of position
Case narrative: A DP 2 vessel was involved in ROV operations in deep water with good visibility. The environmental conditions were moderate with a wind speed of 15 Knots and […]
Lack of operational planning leads to DP incident
Comments from the report: It was concluded that the loss of both DGNSS were due to huge superstructure of the installation interfering with satellite signals. This phenomenon is called reflection […]
DP incident caused by human factor
Comments from the report: It is mentioned in the report that DG#4 tripped out for unknown reasons. Elsewhere in the report the cause of this incident is mentioned as complacency […]
DP emergency drill scenario
DP emergency drill scenarios are included to assist crew members conduct DP drills on-board. The intent is that the template can be used on any DP vessel so specific details […]
DP2 semi-submersible MODU DP incident
Case narrative: A DP2 Semi-submersible mobile offshore drilling unit (MODU) was working in field preparing for drilling operations on location. The environmental conditions at the time were benign. Cargo operations […]
DP incident with assisted mooring
Comments from the report: During cargo operations in DP assisted mooring, due to undefined information being fed to the DP system, the pitch on the port propeller increased to maximum. […]
DP incident caused by software glitch
Comments from the report: The two meters move command was given in two one-meter steps to the DP system by the operator with a time lapse of a few seconds. […]
Vessel collision with wind turbine – MSF safety alert 20-01
What happened? After a transfer of 4 technicians to a wind turbine, the vessel was positioned just outside the 200-meter exclusion zone for standby. The next task was to pick […]
Unreliable component causes a DP undesired event
Comments from the report: Investigation found that a 24v bridge rectifier supplying voltage to the main generator switchboard breakers 1 and 2 had burned out. The age and quality of […]
Change of heading leads to DP incident
Comments from the report: The vessel had been on DP for the whole day and in order to lift the ROV on deck with the crane, vessel heading had to […]
DP undesired event due to online maintenance work
Comments from the report: The vessel reported that they had changed these modules in the past whilst on DP without any issues. The risk assessment had identified that the consequence […]
Steering motor failure leads to loss of both aft thrusters – DP incident
Case narrative A DP2 cargo vessel was working close to a pipelaying vessel conducting cargo operations in a drift off position. The current at the time of the event was […]
Pipe leak leads to loss of all thrusters – DP incident
Comments from the report Whilst pressurising the fire main for helicopter operations, a gasket failure occurred on the pipework valve under the engine room floor in front of transformers 690V/440V […]
Vessel rotation leads to loss of position – DP incident
Case narrative A DP2 ROV support vessel was working close to a metrological (met) mast within a wind farm. With ROV work completed, the project instructed the vessel to be […]
Unreliable position reference systems leads to DP incident
Comments from the report Only 2 DGNSS were online, with poor signal quality due to the location and environmental conditions. The end effect was that the deviation from the set […]
DP3 drillship switchboard blacked out – DP undesired event
Case Narrative: A DP 3 6th generation drillship was set up on automatic DP engaged in plug and abandonment operations in field. The DP design concept of the vessel was […]
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