Marine Order 503 (Certificates of survey – national law) 2018 (MO503) outlines when a domestic commercial vessel (DCV) needs a certificate of survey, and related survey requirements. These requirements help ensure that commercial vessels operating in Australia are safe and seaworthy.
During February 2025, there were 101 reported marine incidents involving domestic commercial vessels. Of these, 12 were serious and one was very serious.
The MNL applies to most commercial vessels operating in Australia. It helps fund the cost of operating and maintaining marine aids to navigation systems.