This case study examines an DP incident that occurred on an equipment class 2 MODU, during well intervention operations. The unit was operating in open bus configuration with all four […]
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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 [email protected]
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
Know your vessel capabilities and when to stop!
With all engines and thrusters engaged, a DP equipment class 2 pipe supply vessel (PSV) was operating in open bus configuration. The vessel was engaged in cargo operations with a […]
Configuration – PRS’s Hidden Common Failure
A vessel was conducting ROV operations in the North Sea in open water, and was believed to be configiured as per the ASOG with open bus 2-way split, four thrsters […]
Consequences of Decisions – Heading Change left too late
Case narrative: A DP2 vessel was conducting drilling operations and connected via the riser to the well in 2000m water depth. The vessel was configured Closed Bus with four out […]
DP2 Service Operations Vessel (SOV) DP Incident
Case narrative A DP2 walk to work vessel was operating inside an offshore windfarm manoeuvring into position to permit transfer of people and cargo to a wind turbine by means […]
Computer Error Caused a DP Incident
Comments from the report: The vessel engaged the support of the DP system manufacturer for investigation on completion of the operation. The OEM detailed that the DP controller had been […]
DP2 Cargo Vessel DP Incident
Case narrative A DP2 platform supply vessel (PSV) was approaching the field and preparing for cargo operations on location. The current at the time of the event was 1.2 knots […]
Human Factor caused a DP Incident
Comments from the report: Human factor played a role here, checklists were completed but the minimum number of position reference systems (PRS) for a DP class 2 operation were not […]
Simultaneous activities on the bridge caused a DP Incident
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 […]
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 […]
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. […]
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