Comments: Subsequent investigation identified the following: Through extensive evaluation by numerous technicians, the main cause of the incident was found to be the improper wiring of the main and backup […]
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
Thruster entanglement during shuttle tanker operations
Comments: Operations were conducted according to procedures. It was concluded that the procedures for this operation needed to be modified to limit the amount of rope in the water to […]
Instability of position reference systems
Considerations from the above event: It is not clear from the report whether it was the differential correction signal or satellite constellation that was shielded, however operators need to be […]
Thruster fault
Considerations from the above event: All available means should be used to identify the faulty thruster and then shut it down as deselecting it from the DP system might not […]
Differences between operator stations
Considerations from the above event: Whilst it is not clear what caused this event it does stress the importance of field arrival and set up tests designed to identify operator station […]
Thruster failure and unavailability
Considerations from the above event: The crew followed good procedures by suspending operations in a controlled manner ready for investigation.
Unintentional deselection of a DP control function
Considerations from the above event: This event highlights the possible consequences of deselecting critical DP system buttons. Significant changes to any system should not be made during critical phases of […]
Change of a vessel centre of rotation
Considerations from the above event: The centre of rotation should not be changed during critical operations. Because of the likely increase in length of the lever to control heading, careful […]
Power distribution
Considerations from the above event: With only two diesel generators on line the DPO must be fully aware of the consequences of a worst case failure (WCF).
Thruster unavailability
Considerations from the above event: From the information provided it would appear that the vessel is set up so as to allow for the worst case failure (WCF). Therefore, if […]
Marine Safety Forum Safety Flash 15-18: Collision with rig
The Marine Safety Forum has granted permission to forward a copy of their Safety Flash 15-18. The subject of the Safety Flash is ‘Collision with Rig’ and it involves a […]
DP management: Dealing with the unexpected
“It’s 04:00 hours, on the night shift. Do I really need to go through the four hourly DP checklist, for the third time tonight? I remember asking myself that same […]
System failures on offshore supply vessels
This joint safety alert (attached) has been issued by the Bureau of Safety and Environment Enforcement (BSEE) and the United States Coastguard (USCG). It addresses a dynamic positioning (DP) incident […]
Loss of three gyros on a DP-3 drill ship
Three gyro compasses connected to DP system had a ‘heading freeze’ within 5 minutes of time. What happened? Three DP System connected gyros heading froze within 5 minutes of time. […]
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