Marine Safety Act 1998

For the purpose of conducting an investigation, an authorised officer may at any reasonable time—

stop any vessel, and

board any vessel, and

enter any land for the purpose of boarding any vessel (other than land used for residential purposes), and

take along any assistants or equipment required to assist the investigation.

For the purpose of boarding the vessel, the authorised officer may direct the person operating the vessel to manoeuvre it in a specified manner or to a specified place or to secure it in a specified manner.