See here the original articel of the BBC
Sydney’s ferries are usually the most pleasant choice of Sydney’s public transport options. Manly is a suburb of Sydney at the outer side of Sydney, facing the Pacific Ocean. This is why Manly is famous for its’ good surfing conditions and the easy beach life. However, this crossing was less relaxed as the vessel got into very rough waters created by a cyclone in the Pacific. Passengers had to hold on tight and stay inside the vessel.