Allright, I am a pilot still using INS. By coincidence A300 AND operating from the Mid-East. We fly charter to and from Europe and so having a lot like this. Lot`s of CDG, Heatrow , Milan etc. so we have this `direct Logan`, quit a lot. First of all let me say that we prepare our flight. After 4 hrs ruise it is easy to set up your expected approach with all the different wayponts, so you are familiar. So you more or less know what to expect. This is the same in FMS a/c! And inserting a waypoint, reading coordinates from a Jepp aerea or approach chart takes only 20 sec. Depents how you are prepared. If you are cleared to an unexpected waypoint, you still have VORS, NDB, and initial reference headings helping you during the short time it takes to setup this "new" waypoint...works perfect for me!
