I believe the runway/terrain depiction is based on
1- the very very accurately located thresholds (both with respect to Lat Lon and elevation)
2 - a 'normalising' of the terrain data to make sure the terrain elevation matches the threshold points (from 1 above)
3 - a contouring of the runway to match the normalised terrain connecting the two threshold points
4 - colouring the runway to match the published markings
I have never used SV, but despite the cautions from the posters who are commercial operators, I would have thought the ILS crossbars and a momentum vector laid onto a SV view of the runway (less so the surrounding terrain) would provide a very compelling and accurate flight path to precisely the desired DH and localised centreline.
HOWEVER, I would be concerned it is so compelling that people figure, 'I can go another 20 feet, 100 feet, I can actually land Blind!'. Moreover, I don't think there is any objective training of why this is unsafe (vs. a simple statement that it is not legal)
Last edited by mm_flynn; 9th Jan 2012 at 14:43.