Originally Posted by
z.khalid
A standard rate of descent and FPA is set for the descent is that correct?
For example 300 feet per nm and 3.0 FPA
What about when you DONT have a DME?
Just plan your descent so you won't bust any steps down.
And for the no DME question, since you list yourself as being in Canada I invite you to read the AIM, COM 3.16.9 "Use of GNSS in Lieu of Ground-based Aids"
COM - 3.0 RADIO NAVIGATION AIDS - Transport Canada
3.16.9 Use of GNSS in Lieu of Ground-based Aids
Subject to any overriding conditions or limitations in the aircraft flight manual (AFM) or AFM Supplement, GNSS may be used to identify all fixes defined by DME, VOR, VOR/DME and NDB, including fixes that are part of any instrument approach procedure, to navigate to and from these fixes along specific tracks, including arcs, and to report distances along airways or tracks for separation purposes. This can be done as long as there is no integrity alert, and provided that all fixes that are part of a terminal instrument procedure (arrival, departure, or approach) are named, charted and retrieved from a current navigation database. GNSS may be used to identify fixes defined by ground-based aids, even if they are temporarily out of service.
For example, if the DME associated with an ILS/DME approach is unserviceable, traditional aircraft would be denied the approach; however, under these rules, the pilot of a GNSS-equipped aircraft may request and fly the approach.
Note that for NDB or VOR approaches that are not part of the GPS overlay program described in Section 3.16.5.2.2, pilots shall use ADF or VOR as the primary source for final approach track guidance. For these approaches, and for approaches based on a localizer (LOC) for lateral guidance, pilots shall not use GNSS as the primary source for missed approach guidance when the missed approach procedure requires flying a published track to or from an NDB or VOR.Where ATS requests a position based on a distance from a DME facility for separation purposes, the pilot should report GPS distance from the same DME facility, stating the distance in “miles” and the facility name (e.g. “30 miles from Sumspot VOR”). This phraseology is used for all RNAV systems. When reporting DME distance, the pilot includes “DME” in the report (e.g. “30 DME from Sumspot VOR”). This enables ATS to allow for the DME slant range.
Note that under this approval, there is no requirement to carry the avionics normally used to identify fixes defined by ground-based aids, but other considerations may apply. This topic is discussed in Section 3.16.10