| You two are right, of course. But it was not a user-friendly device, and only gave us a slight reduction in the RVR required. It was only in your peripheral vision, because you were still watching the rwy centreline lights (of which only one or two are visible at a time in low-vis, but you have to use them). As the PVI (LCD display) was only at arm's length, it was out of focus, particularly for those of us with presbyopia.
[For those not au-fait, the most difficult stage of a low-vis take-off is the beginning. Once the centreline lights start to "stream" under the nose, the fact that only one or two are visible at any one moment ceases to be a problem.]
There was a similar idea to the PVI on the A310, but I found it much easier to use because it was in the form of a head-up display, focused at infinity I think. |