Part of the briefing for a practice autoland will cover the fact that LVOs are not in force, and the beam will not be protected. We are therefore prepared to take over manually and complete the landing, assuming visual references are sufficient (which they should be, considering that by definition the weather for a simulated autoland will always be CATI+). It is part of the TEM when flying such an approach.
I'll say it again: There is no requirement to tell ATC that you are conducting a practice autoland. It doesn't change anything for them: at a busy airfield, they are not suddenly going to give you low vis protections just because you want to practice. The SIA incident you cited could have been avoided if the crew had disconnected the automatics when it became clear that they weren't coping adequately with the situation, or flown a go around/baulked landing. They allowed the autopilot to steer them into the grass. Proper briefing, and proper monitoring is imperative to avoid such an occurrence.
Last edited by seen_the_box; 27th Nov 2015 at 09:41.