Look at your ILS feather......if there is a triangle pointed towards the runway, then it has a localizer and a glideslope, but if there is an arrow pointed AWAY from the direction of the runway then it has a localizer only...

P.S. In the case where it is a localizer only, you will have to use the backcourse instead of the approach button, and you will have to control your altittude manually, but the localizer will still keep you centered on the runway .....
Last edited by GA_Pilot on Tue May 24, 2005 7:42 pm, edited 1 time in total.