I land airbus's (A321 wilcopub) regularly first time at Dusseldorf but my CRJ 700(wilopub) gives me grief. I have a suspicion my Glide Slope height is questionable EDDL is about 145 feet above Sea Level do I add this to my FL290 (2900ft). When I try a second time it's ok because I make sure of a long straight final approach. Obviosly ILS I am talking. Perhaps a final of 15NM straight is required. CRS 053 Freq 111.50 and final height of 2900ft RNWY 05R. Any indications and help would save me tearing my hair out 

Thanks for replying. Yes your quite right trying to be too clever FL290 is flight level 29000 feet. Meant the glide slope capture height, Which you have clarified. so you add sea  level to the chart height given ~ which general rule of thumb is :- 2900 feet for many SIM airports. Plus airfield above Sea Level ~ Thanks Dave

bifo wrote on Aug 9^th, 2012 at 4:35pm:



Ok, now I'm understanding better.  If you are using an approach plate or chart for your approaches, the altitudes given on the chart are above sea level, you do not add the elevation of the airport.  The elevation above sea level is already factored in on the chart.  Otherwise, if you are just using 2900 feet above the ground as your normal height for intercepting all ILS, then you do need to factor in the elevation of the airport. 

And typical approaches usually have you intercept the glideslope at 2000 feet above the ground, at the outer marker.  For instance, at my home airport of KMCW, field elevation is 1213', so the approach plate indicates an intercept altitude of 3200'.