Those should be based in Tauranga, as proposed and, in the trust's view, Taupo.
"Helicopters...can get to remote places extremely quickly and if you draw an arc around the area of a helicopter based in Tauranga and Taupo, they virtually entirely overlap the area covered by the current Rotorua service."
Getting rid of Taupo's service would leave the region south of Lake Taupo - a popular recreational spot with fast-changing and challenging climatic conditions - vulnerable, the trust said.
The Trust said it did support many of the changes in the new proposal for how the Government will purchase rescue helicopter and air ambulance services.
That included increasing the scope of services to include carrying doctors and nurses as well as paramedics.
"The proposal does contain a number of excellent service enhancements and quality improvements."
The trust was working with other rescue helicopter trusts to respond to the proposal.
"That response will include a proposal to re-include Taupo."