A.Agincourt
I don't know if you are a NS pilot but what you say about seeing a reflection is fanciful.
For those that don't know the ETAP rig it is one of the biggest in the NS. Geoffers video is a good example of the smaller SNS rigs but is not really relevant to something the size of ETAP.
The rig is split into 2 main structures, production and accommodation. The production area is a huge cube with its upper deck about 300ft amsl and surmounted by a flare top about 500ft amsl.
The accommodation has a large helideck on top at a height of about 170ft amsl. The deck is well lit with modern green lighting.
There has obviously been a lot of discussion and theories bounced around NS crewrooms based on the information released so far but we will wait and learn from the AAIB report and not speculate in public.
There will be a whole string of events that led up to this accident any one of which, if changed, would have stopped the accident. It is up to us as professional pilots to break the chain before the final link is in place.
The RAF had a very good Flight Safety film demonstrating this, based on a real accident.
HF