THREE people escaped unhurt after an engine began releasing smoke on board their boat near Burra on Saturday.
A Sumburgh based coastguard helicopter and the Aith lifeboat were tasked around 12.30pm after receiving a call from a vessel off West Burra that reported a smoking engine.
The Rescue 900 chopper attended the scene and located the 20ft boat, but the overheated engine had been disconnected and the smoke had died down.
Nearby boats in the area then towed the vessel with the people on board into Hamnavoe. They were unhurt and did not require medical attention.
The Lerwick and West Burra Isle coastguard rescue teams also attended the scene.