I noted that several people asked why this runway does not have an ILS.
There are terrain features that prohibit the installations of an ILS, and one of those is if the terrain on the runway axis a certain distance before the threshold is nor fairly flat for a certain distance, in order for the Radio altimeter, which does not measure the height of the aircraft above the runway, but the height of the aircraft above the terrain directly below it, to be able to activate certain features such as flare mode, or changes flight laws, elevator trim, auto thrust etc. Even a dinosaur like the 737NG has such RA dependent features.
Such features would not work correctly if the terrain half a mile before the threshold was significantly higher or lower than the runway threshold.
I remember in a distant past flying ILS approaches in aircraft that did not even have a RA, but the aircraft I now fly prohibits ILS approaches if both RA are U/S.
Last edited by Gilles Hudicourt; 6th Nov 2017 at 11:47.