The Toll NSW Ambulance Rescue Helicopter took off from Bay and Basin Leisure Centre oval just after 4pm and is transporting the teenage girl to St George Hospital in Sydney.
The helicopter has landed and the girl should be flown out to St George Hospital in Sydney shortly.
She remains in a serious condition with pelvic, head and neck injuries and injuries to her lower leg.
Both teenagers have now been removed from the vehicle.
One girl has pelvic and neck injures and is in a serious condition.
She will be transported by air ambulance from the oval of the Bay and Basin Leisure centre.
The second girl has minor injures and is being transported to Wollongong hospital by ambulance with neck pain and abrasions.
Both of the female occupants are 17-years-old.
The nature of the injuries at this stage aren't clear.
One patient is expected to be transported to Wollongong by Ambulance and the other by air.
Emergency service are on the scene of a single car accident on Naval College Road in Vincentia.
One of two female occupants is trapped in a vehicle which has crashed into a tree.
The triple-0 call was made just before 2pm on Wednesday, February 12.
One ambulance is on the scene and three other units are currently responding.
NSW Ambulance confirmed at least one person is currently trapped but the ages of the passengers aren't known.
The Toll NSW Ambulance Rescue Helicopter has been called to the scene.
More to come.