The Gulfstream EVS system was a decent system but not perfect. The image it the HUD had a tendency to appear left or right of center when used with the HUD unless "sited" exactly on target (better than required per the CMP card). Also unless it was CAVOK outside the EVS image didn't quite live up to standard. The joke is the best that the EVS will work is in the simulator and most operators will say the system was nice but waste of money and they don't have a lot of faith in it.
On a few occasions the EVS has help us out as our fleet only hold Cat 1 certification. A HUD and EVS combination is a sort of easy way to maintain a quasi CAT 2 certification. On a HUD/EVS equipped Gulfstream during HUD/EVS operations, only the PF
has to identify the runway environment at DH
, then you’re allowed to decent another 100' not to exceed 100" AGL. After you descend another 100' below DH
, the PNF has to have visual on the runway landing environment and the responsibility for the go-around call then lies on the PNF. So theoretically in laymen’s terms on a CAT 1 certified aircraft with the HUD/EVS system you can go to CAT II
minima (even on a CAT 1 approach), that’s if you have faith in your EVS and it picks up the runway at 200'.
Gulfstream just released an ASC for a "generation II
" system that is supposed to be quite a bit better than the first generation system, although I don't have any experience with it. Generation II
has now been incorporated into production as an option but I don’t believe any operators have yet upgraded their pre generation II
The video posted was of a generation 1 system without the HUD image. It has some HUD symbology in the video but is the image displayed on the cockpit (via CDU
, Airshow display or on the Planeview system).
By the way this is my first meaningful airliner.net post after observing for quite some time, so I hope this is up to the appropriate technical standard and hello to all the .netters out there!