becomes unsafe; the flight crew:
o  Interrupts the approach

o  Executes a missed approach

o  Informs the ATC controller.

When a maneuver is required, the flight crew may adjust the speed or heading to maintain an appropriate distance behind the preceding aircraft.
D.2. OPERATIONAL ENVIRONMENT
.  
Approach under radar surveillance down to the ground

.  
Ground surveillance with one SSR and one PSR

.  
Communication between the flight crews and controllers via VHF voice

.  
Traffic density from low to high

.  
All types of runway configuration (e.g. single, independent parallel, dependent parallel, etc)

.  
Approach in VMC only

.  
Preceding aircraft capable of ADS-B OUT.

APPENDIX E – NUC, NAC, NIC, SIL

The following table provides an overview of NUC/NAC/NIC/SIL values used in ADS-B transmissions. It must be seen as for information only. For specification purposes, refer to appropriate documents.
NUCP  Integrity  Accuracy 
0  -- --
1  HPL < 20 NM  HFOM < 10 NM 
2  HPL < 10 NM  HFOM < 5 NM 
3  HPL < 2 NM  HFOM < 1 NM 
4  HPL < 1 NM  HFOM < 0.5 NM 
5  HPL < 0.5 NM  HFOM < 0.25 NM 
6  HPL < 0.2 NM  HFOM < 0.1 NM 
7  HPL < 0.1 NM  HFOM < 0.05 NM 
8  HFOM < 10 m, VFOM < 15 m 
9  HFOM < 3 m, VFOM < 4 m 

SIL  Probability of Exceeding Containment Bounds for NIC Without Being Notified 
0  (No Integrity)  
1  < 10-3 per flight hour 
2  < 10-5 per flight hour 
3  < 10-7 per flight hour 

NIC  Integrity Containment Limits 
0  --
1  RC < 20 NM  
2  RC < 8 NM 
3  RC < 4 NM 
4  RC < 2 NM 
5  RC < 1 NM 
6  RC < 0.6 NM 
7  RC < 0.2 NM  
8  RC < 0.1 NM  
9  RC < 75 m 
10  RC < 25 m 
11  RC < 7.5 m 

NACP  Accuracy 
0  --
1  EPU < 10 NM  
2  EPU < 4 NM  
3  EPU < 2 NM  
4  EPU < 1 NM  
5  EPU < 0.5 NM  
6  EPU < 0.3 NM  
7  EPU < 0.1 NM  
8  EPU < 0.05 NM 
9  EPU < 30 m, VFOM < 45 m  
10  EPU < 10 m, VFOM < 15 m  
11  EPU < 3 m, VFOM < 4 m  
　
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