I think it would REALLY help people understand what happened if the CEFAA actually released all the reports and all the conversations with the ATC etc.
For example: Did the Heli crew radio ATC and say " We have a craft NW of our position about 35 miles away at 4500ft. Can you see anything? " If so did the Santiago ATC say " Nope" or did they say" No, but at that heading there's one 65 miles away at 20,000ft?"
Basically NOBODY on this thread knows, and without knowing who said what we have no idea whether or not anybody was looking in the right place for a radar return or misinterptreted an answer or whether there really IS a mystery craft that is invisible to Radar but not IR.
Who exactly ARE the CEFAA anyway? They SEEM to be fairly official. Their website says they are officially a part of the DGAC, their website is a .gob.cl, their email is @DGAC.gob.cl and yet, as has been mentioned, their "partners" that they work with are very much people who lean towards the more fanciful explanations, (people like NARCAP for example)
It has already been shown earlier in the thread that they have been known to miss obvious things like Bugs close to the camera and the French analysts they used calculated the wrong camera and admitted they didn't even know what all the information on the screen meant but didn't think to ASK anyone. If I had been asked to investigate this I would certainly have phoned or emailed the manufacturers to ask what all these numbers meant.