What is the difference between VOR(D), VOR(V) and VOR(S) seen in the table? What do the letters D, V and S stand for or represent?

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1 Answer 1


Those letters are different ARINC 424 Route Type identifiers for instrument approaches:

5.7 Route Type (RT TYPE)

Definition/Description: The “Route Type” field defines the type of Enroute Airway, Preferred Route, Airport and Heliport SID/STAR/Approach Routes of which the record is an element. [...]

Source/Content: The content of this field (for approach procedures) will be as indicated in the following tables: [...]

Approach Route Type Description Route Type Field Content
Approach Transition A
Localizer/Backcourse Approach B
VORDME Approach D
Flight Management System (FMS) Approach F
Instrument Guidance System (IGS) Approach G
Instrument Landing System (ILS) Approach I
GNSS Landing System (GLS) Approach J
Localizer Only (LOC) Approach L
Microwave Landing System (MLS) Approach M
Non-Directional Beacon (NDB) Approach N
Global Positioning System (GPS) Approach P
Non-Directional Beacon + DME (NDB+DME) Approach Q
Area Navigation (RNAV) Approach R
VOR Approach using VORDME/VORTAC S
TACAN Approach T
Simplified Directional Facility (SDF) Approach U
VOR Approach V
Microwave Landing System (MLS), Type A Approach W
Localizer Directional Aid (LDA) Approach X
Microwave Landing System (MLS), Type B and C Approach Y
Missed Approach Z


So in your case, the V is a VOR approach without DME, the D includes DME and the S is for combined VOR/DME and TACAN (VORTAC).

Similarly, the ILS I, L and B correspond to regular ILS, localizer and backcourse approaches respectively.


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