“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”