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 […]
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
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 […]
Procedures for ploughing using DP discussed – DP observation
Comments: The report concluded that the DPO was conducting too many concurrent tasks so that he did not sufficiently monitor the vessel speed during the time the vessel was being […]
DP trial leads to partial blackout – DP undesired event
Comments: It was discovered that the 230v supply breaker was open and the uninterruptible power supply (UPS) 2 batteries completely discharged. Warning alarms generated by the DP system regarding the […]
Alteration of course with COR offset causes loss of power – DP incident
Comments: The report discussed the set-up and mode selection for the thrusters and main engines during high power manoeuvres such as alteration of course and heading. The vessel standing orders […]
Pipelaying equipment short circuit causes thrusters to trip – DP undesired event
Comments: The vessel maintained position throughout. The ROV was restricted to the tether management system (TMS) until the vessel was confident of the cause of the thrusters’ unexpectedly stopping. All […]
Non-routine lift leads to thruster incapacity – DP undesired event
Comments: The vessel maintained position throughout. The lift had not been properly planned or risk assessed for the object being lifted. There was a failure to recognise that the mattress […]
Separate problem with two thrusters caused loss of DP
Comments: The bow thruster gave an alarm that pitch was at maximum showing 114% on DP display. Investigation concluded that the full starboard maximum limit command/set point of the bow […]
Bow thruster tripped due to lack of power
Comments: The seat for the stop solenoid on the port main engine was damaged causing a slight air leak past it, this acting on the stop cylinder piston caused a […]
Fuel oil filter change leads to generator failure
Comments: During ‘routine’ rounds the engine room watchkeeper decided to replace the left filter of the duplex fuel oil filter of DG No 2. This generator was part of the […]
Incorrect wiring causes loss of all propulsion
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 […]
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 […]
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