Considerations from the above event: With only two diesel generators on line the DPO must be fully aware of the consequences of a worst case failure (WCF).
Considerations from the above event: The centre of rotation should not be changed during critical operations. Because of the likely increase in length of the lever to control heading, careful consideration regarding power availability and requirements is needed whenever the centre of rotation is changed. If wind sensors are being shielded this could have a … Continue reading “Change of a vessel centre of rotation”
The Marine Safety Forum has granted permission to forward a copy of their Safety Flash 15-18. The subject of the Safety Flash is ‘Collision with Rig’ and it involves a DP2 classed vessel that lost position and made contact with a fixed drilling rig. The main cause of the incident could ostensibly have been recorded … Continue reading “Marine Safety Forum Safety Flash 15-18: Collision with rig”
“It’s 04:00 hours, on the night shift. Do I really need to go through the four hourly DP checklist, for the third time tonight? I remember asking myself that same question when I worked the 18:00-06:00 watch, then later in my career I was making sure DP operators, that served on my ship knew why … Continue reading “DP management: Dealing with the unexpected”
This joint safety alert (attached) has been issued by the Bureau of Safety and Environment Enforcement (BSEE) and the United States Coastguard (USCG). It addresses a dynamic positioning (DP) incident involving an Offshore Supply Vessel (OSV) which resulted in a loss of position during a critical activity attached to a wellhead.
Three gyro compasses connected to DP system had a ‘heading freeze’ within 5 minutes of time. What happened? Three DP System connected gyros heading froze within 5 minutes of time. With all three gyros out of service, drill ship’s DP Model took over. 34 minutes later all gyros had been rebooted and were online in … Continue reading “Loss of three gyros on a DP-3 drill ship”