More than 20 firefighters tackled a fire which had taken hold within two yachts in Inverkip Marina.
The Scottish Fire and Rescue Service was alerted at 1.45am on Sunday, February 10 to reports of a well-developed fire.
At its height, four fire engines and an aerial appliance were in attendance as crews worked to extinguish the flames.
Firefighters worked through the night to ensure the area was made safe, before leaving the scene at 12.30pm.
There were no casualties.
Graeme Binning is SFRS' Local Senior Officer for East Renfrewshire, Renfrewshire and Inverclyde.
He said: "This has undoubtedly been a technically challenging and protracted incident, and our crews have worked throughout this morning to ensure the area is made safe.
"The nature of the incident required careful planning as we worked to prevent further damage to property.
"I would like to take this opportunity to thank our firefighters, Operations Control and our partners for their hard work and support throughout this incident."