The operator of a Nelson Bay speed boat adventure tour has landed itself in hot water after a woman broke her back and ankle while on a joyride.
She was a front seat passenger on the Thundaraft which landed heavily while performing wave jumps on December 28, 2015.
The Australian Maritime Safety Authority and the RMS launched an investigation into the incident.
It found the boat shouldn't have gone out that day as the conditions were too rough, posing serious dangers to the passengers.
Owner Jamala Charters pleaded guilty this week to failing to ensure the safe operation of a domestic commercial vessel and was fined $18,000.
The master of the vessel was fined $8,000.
"If you own or operate a domestic commercial vessel in Australia, you are responsible for the safety of everyone on board,” AMSA's David Marsh said.
“Safety should underpin every aspect of your operation. If you fail in that responsibility, you will be held accountable.”