INVESTIGATORS trying to find the cause of the sinking of the Nancy Glen fishing boat in Loch Fyne have called in specialist assistance for their survey.

Duncan MacDougall, 46, and Przemek Krawczyk, 38, were killed when the Nancy Glen capsized not far from her home port of Tarbert on January 18. Crew member John Miller, 34, survived after he was plucked from the freezing water.

The Marine Accident Investigation Branch (MAIB) has begun a survey of the wreck which is lying in more than 450ft of water.

Yesterday they called in Keynvor MorLift (KML), which has specialist undersea survey equipment.

MAIB has indicated it will not be raising the vessel, leading the Clyde Fishermen’s Association and the families of the two dead men to organise a crowdfunding campaign to recover their bodies – nearly £220,000 had been raised by last night, but more is needed.

A statement from MAIB said: “The Marine Accident Investigation Branch is investigating the capsize and loss of the fishing vessel Nancy Glen and why, tragically, two of the crew did not survive.

“The wreck of Nancy Glen is lying at a depth of over 140m. Following a multi-beam sonar survey of the wreck conducted by Northern Lighthouse Board vessel Pharos last weekend, the MAIB has contracted KML to carry out a more detailed survey of the wreck.

“KML’s vessel Severn Sea is on scene, and has carried out a side-scan sonar survey of the wreck.

“This has provided us with 3D information on how the wreck is lying on the seabed and potential obstacles such as wires or nets that could be hazardous to remotely operated vehicle operations.