Use of an appropriate vertical mode such as vertical speed is recommended to initially fly a continuous descent approach. The glide slope should not be armed until on the localiser and also within the glide slope protected area. On my current type ( B737NG) the glide slope will not capture until localiser established. Anticipation cues on the instrumentation (PFD) and standby instruments will indicate position relative to the glide slope prior to localiser capture to assist in achieving a continuous descent approach.
Last edited by Matey; 19th October 2013 at 00:02.