The operator of Sydney's ferries has apologised for yesterday's crash at Circular Quay that injured 19 passengers. Commuters are being assured the fleet is safe, even though mechanical failure looks the likely cause of this latest accident. All passengers sent to hospital after yesterday's ferry crash have been released. The SuperCat 4 was at the Balmain ferry maintenance facility today. Four people were injured when the Manly Fast Ferry hit a bollard in May.