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 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 case studies 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.
To be included into the subscription list for the DP Event Bulletin emails, email communications@legacy.imca-int.com
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
Richard Purser
Technical Adviser - Marine
Contact
DP Events
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 […]
Mix of absolute and relative position reference systems – DP incident
Comments from the Report: It was considered that the movement towards the drill ship could have been caused by a combination of position reference system degradation and interaction from the […]
Accidental breaker trip – DP undesired event
Comments from the Report: The vessel was experiencing heavy rolling and pitching. The watch keeping engineer lost his balance and his hand made contact with the No. 2 shaft generator […]
Failure of DP UPS – DP undesired event
Comments from the Report: The vessel maintained position but DP equipment class 2 capabilities were compromised. It was noticed that there was a strong burning smell from the UPS. The […]
Operating outside DP equipment class 2 requirements – DP incident
Comments from the report: Although DP checklists were completed, the availability of the standby operator station was not confirmed. The most probable cause for DPOS2 to freeze and not auto […]
Unfamiliarity with DP system leads to – DP undesired event
Comments from the report: Both DPOs had several years’ experience but with a different DP control system where it is common to stop the vessel during a move by reducing […]
Software update caused loss of generators in separate redundant groups
Case narrative A DP2 platform supply vessel (PSV) was set up on auto DP whilst conducting trials in open water after extensive upgrades. The redundancy concept was based on two […]
Leaking cooling water pump leads to – DP undesired event
Comments from the report: A leaking seal was observed on the Port ME cooling water pump; it was replaced, and the engine tested prior to returning to operations. Considerations […]
Maintenance during DP operations leads to – DP undesired event
Comments from the report: The oil level gauge was not reading the actual level. The duty Engineer did not inform Bridge/DPO`s of maintenance on the header tank of stern thruster. […]
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