# Commission Implementing Decision (EU) 2015/1183 of 17 July 2015 setting out the necessary technical and operational specifications for implementing version 3 of the EGNOS system, Division 4: Safety-of-Life service technical and operational specifications

Extent: E+W+S+N.I.

4.1.
Aviation service
The performance specifications included in this table address only signal-in-space contributions.
A range is given for service availability for approach procedure. The bottom of the range shall correspond to the availability expected for the GPS L1-only service. The top of the range shall be available for users equipped with a dual frequency GPS L1-L5 receiver or a combined GPS/Galileo dual-frequency receiver.
‘Land masses of an area’ means any land territory, including islands, in the FIR of that area except for the Cat I service for which coverage of Azores, Madeira and Canary Islands are excluded.
Until sufficient Galileo performance is demonstrated, APV-I service level is accepted.
En-route — Non-Precision Approach
Approach with Vertical Guidance APV-I (legacy service)
LPV 200 Approach
Cat I Precision Approach
Standards
Annexe V, point 3(a) of Implementing Regulation (EU) No 1035/2011, as applicable
Lateral accuracy
220 m
16 m
16 m
16 m
Vertical accuracy
Not applicable
20 m
4 m
4 m
VNSE — fault-free conditions
N/A
N/A
10 m
with probability of 10–7/150 s
N/A
VNSE — system failure conditions
N/A
N/A
15 m
with probability of 10–5/150 s
N/A
Integrity risk
1,10–7/hour
2,10–7/150 s
2,10–7/150 s
2,10–7/150 s
Time To Alarm
10 s
10 s
6 s
6 s
HAL
556 m
40 m
40 m
40 m
VAL
Not applicable
50 m
35 m
10 m
Continuity risk
1,10–5/hour
8,10–6/15 s
8,10–6/15 s
8,10–6/15 s
SoL Service availability
0,999
0,99
0,99 to 0,999
0,99
Service area
Flight information regions (FIRs) of EU-MS + Norway and Switzerland
Landmasses of EU-MS + Norway and Switzerland
Landmasses of EU-MS + Norway and Switzerland
Landmasses of EU-MS + Norway and Switzerland
Target service area extension
Article 2(5) of Regulation (EU) No 1285/2013
Performance of reversion modes
EGNOS V3 shall deliver LPV 200 service level over its Service Area with 99 % availability when reverting to the use of the Galileo constellation only.
EGNOS V3 shall deliver LPV 200 service level in the land masses of the Service Area with 99 % availability upon complete loss of L5/E5a frequency at user level.
Guarantee of service
Yes
Accessibility
Through SBAS-compatible receivers
4.2.
Maritime service
The performance specifications included in this table address only signal-in-space contributions.
National (or territorial) waters are defined in the 1982 United Nations Convention on the Law of the Sea as waters extending at most 12 nautical miles from the coast line.
Navigation in harbour entrances,Harbour approaches and coastal waters
Standards
IMO Resolution A.915(22) and A.1046(27)
Lateral accuracy
10 m
Vertical accuracy
Not applicable
Integrity risk
1,10–5/3 hours
Time To Alarm
10 s
HAL
25 m
VAL
Not applicable
Continuity risk
3,10–4/15 minutes
SoL Service availability
0,998
Service Area
National Waters of EU-MS + Norway and Switzerland
Guarantee of service
Yes
Accessibility
Through SBAS-compatible receivers

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Source: https://www.legislation.gov.uk/eudn/2015/1183/annex/division/4 (the official version)
Page: https://openlegislation.uk/eu-decision-2015-1183/annex/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.