Incident caused by software glitch
- DP Event
- Published on 14 May 2020
- Generated on 25 June 2026
- DPE 02/20
- 1 minute read
Incident
This and similar incidents highlight the need for extensive testing of the software at all stages.
Comments
The two metres move command was given in two one-metre steps to the DP system by the operator with a time lapse of a few seconds. This was investigated by the DP system vendor and was identified as a software glitch. Two consecutive incremental move commands before the window screen has time to refresh resets the DP system to a zero position automatically.
Instructions were put in place on-board this and similar vessels until the vendor remedies the software issue.
Considerations
- This and similar incidents highlight the need for extensive testing of the software at all stages.
- Many vendors continuously update their software with patches, revisions, etc. Vessel operators must ensure a robust management of change (MoC) procedure and suppliers should provide an appropriate rigorous testing program.
- The DP operator(s) appear to have initially responded well to the incident and this is a credit to their training and competence.
Latest DP incidents
-
Think twice. Press once!
On a DP equipment class 2 supply vessel engaged in drilling, an incident occurred due to lack of operational knowledge
DPE 01/26
11 May 2026
Incident
-
Network issues, not a thing of the past
A DP equipment class 3 vessel was engaged in saturation diving activities, with two divers in the water when this DP incident occurred.
DPE 01/26
11 May 2026
Incident
-
All swept up
A DP equipment class 2 vessel was engaged in rock placement operations, within close proximity to a structure, when this event occurred.
DPE 01/26
11 May 2026
Undesired event
-
Hybrid system won't accept load
A DP equipment class 2 vessel was engaged in operations whilst holding position on auto DP, when this undesired event occurred
DPE 01/26
11 May 2026
Undesired event
-
DP drill scenario – Loss of main DP system UPS
The objective of this scenario is to identify risks and impacts of losing the main DP system uninterruptible power supply, possibilities to reduce that risk and suitable actions to be taken if such an occurrence happened.
DPE 01/26
11 May 2026
Drill Scenario
The case studies and observations above have been compiled from information received by IMCA. All vessel, client, and operational data has been removed from the narrative to ensure anonymity. Case studies are not intended as guidance on the safe conduct of operations, but rather to assist vessel managers, DP operators, and technical crew.
IMCA makes every effort to ensure both the accuracy and reliability of the information, but it is not liable for any guidance and/or recommendation and/or statement herein contained.
Any queries should be directed to DP team at IMCA. Share your DP incidents with IMCA online. Sign-up to receive DP event bulletins straight to your email.