The Transportation Safety Board says communication and teamwork failed when a supply vessel hit a drill rig off Newfoundland.
There were no injuries or pollution when the supply ship Maersk Detector hit one of eight steel columns on the GSF Grand Banks on Nov. 24, 2011.
The board says vessel workers continued loading cargo from the rig despite a high risk of collision because of poor communication between bridge officers, and between the vessel and the rig.
Officers on the bridge didn't know the weather had worsened past the point of safety because information about increasing swells wasn't relayed to them.
The board says bridge officers didn't work as a team, and didn't thoroughly use electronic data to keep a safe distance from the rig.
The report says the ship operator and Husky Oil Ltd. (TSX:HSE), operator of the White Rose oilfield, have made changes to lower the risk of a similar strike.
Transport Canada has also recommended changes to the Marine Personnel Regulations that oversee how bridge staff are trained.