 Complete the following phrase:  On Wednesday, 28 March 2007, the Sydney Ferries HarbourCat Pam Burridge collided with a private vessel, the Merinda beneath the Sydney Harbour Bridge. Four people, including a fourteen-year-old girl, were killed in the accident. The Office of Transport Safety Investigations found that the Merinda was not exhibiting the required navigation lights and had not maintained a proper look-out. The summary of the Coroners Report noted It was the error made in failing to illuminate the navigation lights on the private vessel Merinda that allowed the other causal factors to align to create a cascading causal effect resulting in the collision. Australian skating champion Sean Carlow was among the survivors of the accident. His mother and coach, former Australian Olympic competitor Liz Cain, had a leg amputated. One of the dead was a skating judge who had officiated at the 