A surge in the number of helicopters buzzing Franz Josef Glacier township is being welcomed by locals, despite the increased noise.
The Department of Conservation has granted a temporary concession to Franz Josef Glacier Guides to add up to 30 extra flights a day after the foot route on to the ice became too dangerous.
Over the past six months the company has been monitoring a hole in the ice that has created a large arc on the lower reaches of the glacier. It was caused by the river underneath creating a cavity, which causes the ice to slowly collapse in on itself, but effectively rules out foot access to the ice.
Ngai Tahu Tourism regional general manager Fraser Leddie said a new tour, the Ice Explorer, was created after it was decided the glacier was currently too unstable for walks.
"The glacier has been advancing and retreating over the last 100 years and ongoing changes are part of the natural cycle of a glacier. At all times, the safety of our staff and customers is paramount and this new trip is a proactive response to the ever changing environment at Franz Josef."