Charges have been laid against two commercial jet boat drivers following a crash between their boats in January on the Dart River near Queenstown.
In the collision, one passenger's collarbone was broken, and other passengers were bruised.
The jet boats were both from Dart River Safaris, with one heading upstream with 11 passengers, and another heading downstream, containing only the driver.
The charges, laid under section 65 of the Maritime Transport Act, were that the drivers caused unnecessary risk or danger to those on board through their actions.
If convicted, the drivers could face up to 12 months jail and/or a fine of up to $10,000.
Following the incident, Maritime New Zealand imposed conditions on the company, preventing the drivers from operating.
The matter will be dealt with on 29 July at the Queenstown District Court.