SFFP
Your assertion that without an eyewitness we will never know if the Chinook went IMC at all.
Pity you didn't read the Board of Inquiry - with its witness statements in respect of the weather At the time of the crash.
Mr Murchie, lighthouse keeper:" I would estimate the visibility at this stage to be 15 to 20 metres at most."
Mrs Murchie: " went outside to see the helicopter but because of the dense fog we couldn't see it at all. We could hear that it was very,very close and was flying low."
Mr Lamont, lighthouse keeper: "the visibility as I drove over the hill from Campbeltown was down to 10 metres or less.
Mr Brocher: " The weather was really bad at this time, there was a lot of mist and fog, visibility was only about 10 or 15 ft .... I could not see it (the Chinook) for the mist and fog.
There are several others