Re NVG and the length of time it might take to train crews.. As an ex military NVG instructor who helped convert a civilian SAR outfit to use them, it seems to me that some are forgetting that civilian SAR ops don't need to be covert.
What requirement is there for winching under NVG? Surely, there isn't one. Use the gogs for nav assist to fly to the scene but go white light once there. Make the place like daylight and look out using the naked eye. It makes life much more simple, rather than practice bleeding!