What is the difference between VOR(D), VOR(V) and VOR(S) seen in the table?

Question

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?

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

^{(ARINC 424 - 5.0 NAVIGATION DATA - FIELD DEFINITIONS)}

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.