Charges have been laid against two commercial jetboat drivers following a collision on the Dart River, near Queenstown.
One passenger suffered a broken collarbone and several others suffered bruising in the incident on January 4, Maritime New Zealand said.
The collision involved boats from Dart River Safaris, one carrying 11 passengers and heading upstream and the other, carrying the driver alone, heading downstream.
The charges, laid under section 65 of the Maritime Transport Act, are that the drivers caused unnecessary risk or danger to those on board through their actions.
If convicted, the drivers face a term of imprisonment not exceeding 12 months and/or a fine not exceeding $10,000.