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, not knowing the detailed work scope of the ETO.

Considerations from the above event:

  • Both planned and unplanned work on DP equipment should be subject to a permit to work system.
  • Maintenance routines need to be carefully managed during DP operations and planned maintenance of any DP equipment should be avoided whilst the vessel is operating on DP.