777AV8R
It is definitely good fun to do CDA's, if the workload is under control. What kind of kit do you use to judge your profile in the CDA descent apart from the basic maths that we use?
We do CDA's into STN. STN director will tell us '25 miles rw 23, descend....' when we are typically at FL80. That is close to 3 deg (3 * ht)
We then descend at 5* groundspeed all the way down and look at the DME when on the final vector for the LOC, then G/S. A second track mile call is usually given to us, more maths are done and VS adjusted as req'd. The VS is reduced to avoid level off and director give us a further descent to help us also.
We have a Flight Path Angle indicator on the HSI to set up a rough 3deg descent but it is too small to be accurate. (Not all modern a/c have this)
D