I asked Bob Kershaw for his view on the LRUDs issue. Bob is very experienced in this area as he manages the survey data and mapping for the Bullita system, Australia’s longest cave. Here is his reply:
"Hi Peter. The short answer is what ever suits you. Providing your survey party knows what you are doing and, if you have someone else input the data, [that they know what you are doing]. At Bullita the LRUDs are made at the FROM station: a historical protocol and one which I think most people do in Australia. I appreciate the dead end bit comment â€“ worthwhile to think about. Cheers, Bob"