Aircraft Operations. Volume II - Construction of Visual and Instrument ...

Part III — Section 1, Chapter 4 III-1-4-9
Table III-1-4-5. VOR/DME area semi-width
1/2A/W is the greater of these values
Departure 1.85 km (1.00 NM) 1.5 XTT + 0.93 km (0.50 NM)
En-route and arrival segment 1
9.26 km (5.00 NM) 1.5 XTT + 3.70 km (2.00 NM)
Arrival segment 2
9.26 km (5.00 NM) 1.5 XTT + 1.85 km (1.00 NM)
IAF and IF 3.70 km (2.00 NM) 1.5 XTT + 1.85 km (1.00 NM)
FAF, MAPt and TP 1.85 km (1.00 NM) 1.5 XTT + 0.93 km (0.50 NM)
Holding 3
1. Routes which start more than 46 km (25 NM) from the IAF (XTT is determined with BV = 3.70 km (2.00 NM)).
2. Routes which start 46 km (25 NM) or less from the IAF (XTT is determined with BV = 1.85 km (1.00 NM)).
3. Holding areas use different principles (see Section 3, Chapter 7).
23/11/06