"A massive oil tanker, carrying 600,000 barrels of Alberta crude, is cautiously nosing under the Second Narrows Bridge when its rudder fails, pushing it across the 100-metre-wide channel. Escort tugs have less than 30 seconds to react in order to stop the vessel from grounding. With a grinding crunch, the tanker gets hung up on a gravel bar. As the tide falls by four to five metres, the ship is severely stressed and starts to leak its cargo. It carries more oil than the Exxon Valdez released in Alaska in 1989. Fast-flowing currents carry the sticky, black crude west, fouling the harbour and beaches around Georgia Strait. That is the nightmare scenario that oceanographer Peter Baker will present at an oil-tanker safety experts panel Monday afternoon at Vancouver City Hall."