Comments from the Report:
The vessel was experiencing heavy rolling and pitching. The watch keeping engineer lost his balance and his hand made contact with the No. 2 shaft generator breaker push button, thus opening the breaker and causing the loss of power. The vessel has installed transparent covers over vulnerable breaker push buttons to avoid re-occurrence.
Considerations of the IMCA Marine DP Committee from the Above Event:
- Although the incident could have been avoided by better protecting the breaker push-button, the DP system responded as designed.
- Most regulatory authorities require covers to be fitted on emergency stops which have the potential to impact operations.
- The vessel could have moved clear while still on Automatic DP, instead of changing to joystick control.
- With only one generator on-line on each bus, failure of one may cause a partial black-out. It is assumed that this was included in the operational philosophy and activity specific planning.