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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