A man is in a serious condition in hospital after two jet skis collided on Loch Lomond.
Police Scotland was alerted to the collision at about 7.35pm on Saturday and the Loch Lomond rescue boat was dispatched.
Family and friends hauled him on to the island of Inchmurrin with the assistance of Loch Lomond National Park staff.
He was airlifted to Queen Elizabeth Hospital in Glasgow, where police said his condition remains "serious but stable".
Loch Lomond is the most expansive body of water in the British Isles and Inchmurrin is the largest fresh water island.
A bulletin on the Loch Lomond rescue boat website states: "Crew paged at 7.41pm on July 23 2016 by Police Scotland.
"The crew proceeded to the station and were advised of a male in the water who had been involved in a collision near to Inchmurrin island, sustaining serious injuries.
"The crew launched immediately and proceeded to the scene.
"Arriving on scene, the male was found to be still in the water suffering various injuries and been assisted to stay afloat by two persons in the water and with the assistance of the park authority staff.
"The rescue boat crew then assisted in carefully removing the male from the water before taking over treatment and immobilising the patient.
"Coastguard rescue 999 arriving on scene and was able to land on Inchmurrin island, with the assistance of the park authority transferred the male to that location where we continued to fully immobilise him on our vacuum mattress and give further medical treatment.
"After a period of time the male was taken to the helicopter and loaded on board before being flown to Glasgow for further treatment.
"Crew stood down after replenishing our used equipment at 8.50pm."
A Police Scotland spokeswoman said: "We got a call at around 7.35pm on Saturday to report that a man had been injured in the collision of two jet skis.
"He was assisted by friends and family who managed to get him on to Inchmurrin island, and he was airlifted to Glasgow Queen Elizabeth Hospital where he remains in a serious but stable condition."