Comments from the report: The initiating event was the unintentional activation of the DP standby button whilst in Automatic DP control. The radio used to call the installation control was […]
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
Unintentional selection of manual mode – DP incident
Comments from the report: Initiating event: Inadvertent selection of manual mode whilst in full DP mode Main cause: Human factor – The vessel mode of operation was changed from automatic […]
Common mode failure of DGNSS – DP undesired event
Comments: Both DGNSS systems had locked up, the touch screen was not responding and the NMEA signal was no longer being received, the DP system alarm displayed ‘Telegram timeout’. The […]
Thruster command and feedback differences leads to – DP incident
Investigation comments: The DP system reported a thruster pitch prediction error when a large difference between the command and feedback was detected at 20:35:34. The description for a thruster prediction […]
Lack of planning and situational awareness causes – DP incident
Comments: The event was investigated by the vessel operator, findings are summarised here: Human factors: The DPO was left alone at the DP console during critical subsea operations. In such […]
Check of the UPS led to loss of power – DP incident
Comments: At approximately 1555 the ETO came to the bridge and asked the Senior DPO permission to enter the electronics room to check the UPS batteries. The SDPO gave permission, […]
Temporary connection to DP system caused short circuit – DP undesired event
Comments: Various DP equipment, including the DP status lights, were connected via UPS No. 2. Investigation found that the UPS tripped because of a break in the portable cable supplying […]
Following a track on DP causes power issues – DP incident
Comments: The report finding from the vessel concluded: The initiating event was a sudden increase of propulsion to full ahead. The main cause was attributed to the computer with unexpected […]
High voltage breaker trip – DP observation
Comments: Investigation started at the breaker for DG No. 5 in the port switchgear room. The breaker showed tripped and there was a fault present on the auto voltage regulator (AVR). DG No. 5 […]
Both DP operating stations stopped communication – DP incident
Considerations from the above event: It is possible that as the vessel was only recently set up on DP, field arrival trials had not yet been completed. The use of […]
Rip tide presents problems – DP observation
Comments It was a single rip tide and when it had passed the vessel was set up back in automatic position mode. There was clear evidence that a degraded performance […]
Loss of DGNSS resulted in ROV being recovered – DP incident
Comments Both the satellite positioning systems in use were from the same provider. The report recognised this and recommended that the systems were changed so that position information was provided […]
Bad connection causes loss of DGNSS – DP observation
Comments After all the checking, it was found that there was water ingress at the L-Band connector to the antenna on the mast. This was dried and cleaned. The connectors […]
Fire in the engine room – DP undesired event
Comments Investigation found that the turbo charger on engine No 5 was damaged. DP position was maintained throughout. Considerations from the above event: Sharing information on events such as this […]
Bow thruster fault compromises redundancy – DP undesired event
Comments The vessel was working in an open water situation and there was no loss of position. Considerations from the above event: Useful reporting of an undesired event that did […]
Cooling pipe leak threatens main switchboard – DP observation
Comments: A failure of a plug (old decommissioned cooling line for fridge compressors) on seawater cooling pipe for the Ac compressors resulted in flooding in the incinerator room (the water […]
UPS failure causes partial blackout – DP undesired event
Comments: One of the fans in UPS No 1 failed causing the UPS to overheat and shut down. The fan has been replaced and the temperature alarm tested. Considerations from […]
Inadequate communication and planning causes fouled thruster – DP undesired event
Comments: During the over boarding of the end termination through the starboard aft chute, the cable laying shift supervisor asked the bridge to isolate thruster No 5 (port quarter) instead […]
Load sharing imbalance causes loss of position – DP incident
Comments: The power plant was configured to work in closed bus mode. No 2 port, No 2 centre and No 2 starboard generator were online. No 1 port and No […]
DP event investigation and testing inside the 500m zone – DP incident
Comments: The report concluded that the vessel should have proceeded out of the 500m zone to a safe area prior to investigating the fault and conducting tests. Considerations from the […]
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