Hallo,
Trying to get familiar with all modes of IRS update I ended up trying to use RWY REMAIN feature of the IRS update in lieu of GPS or other position update features.
However trying everything I couldn't see it in action. First test was with VOR L/R DME L/R, ILS L/R and GPS L/R set as failed and IRS set with slight offset coordinates. Afterwards I taxied the aircraft to the end of the runway, selected the correct runway and depressed TO/GA.
Second test was with not failures but in NAV STATUS> NAV OPTIONS page I have turned off DME, LOC, VOR and GPS updates and used an intersection takeoff and entered the remaining runway in RWY REMAIN field. Upon selection of TO/GA in both cases the position didn't update to the runway threshold (or THR + distance) and remained in the wrong coordinates.
Can anyone confirm if they have tested this previously? Is my testing method flawed? Or is the feature actually not implemented?
Thank you,