Last year was the busiest ever for Northland's rescue helicopters in NEST's 33-year history, but that record might not last long.
In the first five months of this year the choppers undertook 584 missions, 149 more than over the same period last year.
CEO Craig Gibbons said demand on rescue chopper trusts around the country was greater than ever, Northland being particularly busy because of the large area it covered and the region's "vast" coastline.
"The missions and callouts the team have been tasked with range from long-distance sea winch rescues through to hospital transfers," he said.
"With 2021 shaping up to be busier than ever, it really does highlight the need to have a dedicated Northland rescue chopper service that is committed to providing the highest standard of rapid response critical care possible."