No LPV approaches in UK from 26th June due to Brexit
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That's where I got to, although it is difficult information to find and I am still not sure. I think it may come down to legal liability, and although SoL will probably practically provide integrity control for all PBN approaches there is are no longer any legal relationship or obligation on ESA to provide the service and, absent an agreement, continuity of service etc is obviously not guaranteed. My tentative conclusion is that Air Nav Service Providers in the UK should not publish RNP APCH procedures of any sort. I'm finding it very difficult to locate the document that actually says ANSPs have a legal responsibility, though.
This document too
This document too
My tentative conclusion is that Air Nav Service Providers in the UK should not publish RNP APCH procedures of any sort.
This document too
This document too
Last edited by Torquetalk; 8th Jul 2021 at 14:32.
So somewhat helpfully, one of our GTN 750 equipped types has a full list of what we still have, even though EGNOS SoL (and hence SBAS) is gone. So:
- LNAV are fine.
- LNAV+V are fine (provided you have the latest firmware in your GTN).
- LNAV/VNAV, LP, LPV, LP+V all not fine.
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I'm at the limits of my understanding here, but as far as I can determine integrity control comes from 2 sources. 1. ABAS which incorporates RAIM and the normal multi-sensor FMC operation (called AAIM) 2. The GNSS/SBAS signal itself which in the case of EGNOS is the SoL signal as far as RNP APCH is considered. Failure of either #1 or #2 will give you an integrity warning. I believe that RNP APCH requires system integrity control (#2, in other words independant from the aircraft equipment) in order for the approach to be published, it cannot just rely on #1. But I'm really at the limits of what I can find in documentation. Lack of agreement about SoL, for instance, seems to mean no NOTAMs are issued when service is expected to fall below Annex 10 standards in that location.
I have to say I have no confidence in the CAA getting it right. I mentioned the loss integrity control issue implying loss of RNP APCH to Rob Bishworth, the CAA director responsible to Flight Ops, last summer and asked him what he was planning to do about it. He had no idea what I was talking about, it hadn't been 'flagged up in briefings'.
I have to say I have no confidence in the CAA getting it right. I mentioned the loss integrity control issue implying loss of RNP APCH to Rob Bishworth, the CAA director responsible to Flight Ops, last summer and asked him what he was planning to do about it. He had no idea what I was talking about, it hadn't been 'flagged up in briefings'.
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From that linked document, in various places, my bold:
The EGNOS Safety of Life (SoL) Service is provided openly and is freely accessible without any direct charge. It is tailored to safety-critical transport applications in various domains, in particular, the service is compliant with the aviation requirements for Approaches with Vertical Guidance (APV-I) and Category I precision approaches1 , as defined by ICAO in Annex 10 [RD-1]
Two EGNOS SoL Service levels (NPA and APV-I) were declared with the first issue of the EGNOS SoL SDD v1.0 in March 2011 and an additional one (LPV-200) was declared with the EGNOS SoL SDD v3.0 in September 2015 enabling the following SBAS-based operations in compliance with requirements as defined by ICAO in Annex 10 [RD-1]: • Non-Precision Approach operations and other flight operations supporting PBN navigation specifications other than RNP APCH, not only for approaches but also for other phases of flight. • Approach operations with Vertical Guidance supporting RNP APCH PBN navigation specification down to LPV minima as low as 250 ft. • Category I precision approach with a Vertical Alert Limit (VAL) equal to 35m and supporting RNP APCH PBN navigation specification down to LPV minima as low as 200 ft.
The European Union, as the owner of EGNOS system, the European GNSS Agency (GSA) as EGNOS Programme manager and ESSP SAS, as EGNOS services provider, expressly disclaim all warranties of any kind (whether expressed or implied) to any party, other than Aviation Users specified under 2.2.2 above [see below], and/or for any other use of the EGNOS SoL Service including, but not limited to the warranties regarding availability, continuity, accuracy, integrity, reliability and fitness for a particular purpose or meeting the users´ requirements. No advice or information, whether oral or written, obtained by a user from the European Union, GSA or ESSP SAS and its business partners shall create any such warranty.
[from para 2.2] EGNOS SoL signal covers also territories outside the EU. However, authorising and safety oversight of the use of EGNOS in civil aviation outside the EU falls within the sole responsibility of the respective third country. ESP will support the operational use of EGNOS based procedures via the signature of the EGNOS Working Agreement (EWA) provided that the level of safety at least equivalent to the Single European Sky requirements can be demonstrated by the interested parties on a case by case basis and that there is an agreement between the EU and the third country on the use of EGNOS SoL
The EWA includes ...... NOTAM Proposal Origination: Outlining the terms and conditions under which the ESSP SAS will provide EGNOS NOTAM proposals to the NOFs of the organisation providing Aeronautical Information Services (AIS) under the scope of a signed EWA
The EGNOS Safety of Life (SoL) Service is provided openly and is freely accessible without any direct charge. It is tailored to safety-critical transport applications in various domains, in particular, the service is compliant with the aviation requirements for Approaches with Vertical Guidance (APV-I) and Category I precision approaches1 , as defined by ICAO in Annex 10 [RD-1]
Two EGNOS SoL Service levels (NPA and APV-I) were declared with the first issue of the EGNOS SoL SDD v1.0 in March 2011 and an additional one (LPV-200) was declared with the EGNOS SoL SDD v3.0 in September 2015 enabling the following SBAS-based operations in compliance with requirements as defined by ICAO in Annex 10 [RD-1]: • Non-Precision Approach operations and other flight operations supporting PBN navigation specifications other than RNP APCH, not only for approaches but also for other phases of flight. • Approach operations with Vertical Guidance supporting RNP APCH PBN navigation specification down to LPV minima as low as 250 ft. • Category I precision approach with a Vertical Alert Limit (VAL) equal to 35m and supporting RNP APCH PBN navigation specification down to LPV minima as low as 200 ft.
The European Union, as the owner of EGNOS system, the European GNSS Agency (GSA) as EGNOS Programme manager and ESSP SAS, as EGNOS services provider, expressly disclaim all warranties of any kind (whether expressed or implied) to any party, other than Aviation Users specified under 2.2.2 above [see below], and/or for any other use of the EGNOS SoL Service including, but not limited to the warranties regarding availability, continuity, accuracy, integrity, reliability and fitness for a particular purpose or meeting the users´ requirements. No advice or information, whether oral or written, obtained by a user from the European Union, GSA or ESSP SAS and its business partners shall create any such warranty.
[from para 2.2] EGNOS SoL signal covers also territories outside the EU. However, authorising and safety oversight of the use of EGNOS in civil aviation outside the EU falls within the sole responsibility of the respective third country. ESP will support the operational use of EGNOS based procedures via the signature of the EGNOS Working Agreement (EWA) provided that the level of safety at least equivalent to the Single European Sky requirements can be demonstrated by the interested parties on a case by case basis and that there is an agreement between the EU and the third country on the use of EGNOS SoL
The EWA includes ...... NOTAM Proposal Origination: Outlining the terms and conditions under which the ESSP SAS will provide EGNOS NOTAM proposals to the NOFs of the organisation providing Aeronautical Information Services (AIS) under the scope of a signed EWA
From that linked document, in various places, my bold:
The EGNOS Safety of Life (SoL) Service is provided openly and is freely accessible without any direct charge. It is tailored to safety-critical transport applications in various domains, in particular, the service is compliant with the aviation requirements for Approaches with Vertical Guidance (APV-I) and Category I precision approaches1 , as defined by ICAO in Annex 10 [RD-1]
Two EGNOS SoL Service levels (NPA and APV-I) were declared with the first issue of the EGNOS SoL SDD v1.0 in March 2011 and an additional one (LPV-200) was declared with the EGNOS SoL SDD v3.0 in September 2015 enabling the following SBAS-based operations in compliance with requirements as defined by ICAO in Annex 10 [RD-1]: • Non-Precision Approach operations and other flight operations supporting PBN navigation specifications other than RNP APCH, not only for approaches but also for other phases of flight. • Approach operations with Vertical Guidance supporting RNP APCH PBN navigation specification down to LPV minima as low as 250 ft. • Category I precision approach with a Vertical Alert Limit (VAL) equal to 35m and supporting RNP APCH PBN navigation specification down to LPV minima as low as 200 ft.
The European Union, as the owner of EGNOS system, the European GNSS Agency (GSA) as EGNOS Programme manager and ESSP SAS, as EGNOS services provider, expressly disclaim all warranties of any kind (whether expressed or implied) to any party, other than Aviation Users specified under 2.2.2 above [see below], and/or for any other use of the EGNOS SoL Service including, but not limited to the warranties regarding availability, continuity, accuracy, integrity, reliability and fitness for a particular purpose or meeting the users´ requirements. No advice or information, whether oral or written, obtained by a user from the European Union, GSA or ESSP SAS and its business partners shall create any such warranty.
[from para 2.2] EGNOS SoL signal covers also territories outside the EU. However, authorising and safety oversight of the use of EGNOS in civil aviation outside the EU falls within the sole responsibility of the respective third country. ESP will support the operational use of EGNOS based procedures via the signature of the EGNOS Working Agreement (EWA) provided that the level of safety at least equivalent to the Single European Sky requirements can be demonstrated by the interested parties on a case by case basis and that there is an agreement between the EU and the third country on the use of EGNOS SoL
The EWA includes ...... NOTAM Proposal Origination: Outlining the terms and conditions under which the ESSP SAS will provide EGNOS NOTAM proposals to the NOFs of the organisation providing Aeronautical Information Services (AIS) under the scope of a signed EWA
The EGNOS Safety of Life (SoL) Service is provided openly and is freely accessible without any direct charge. It is tailored to safety-critical transport applications in various domains, in particular, the service is compliant with the aviation requirements for Approaches with Vertical Guidance (APV-I) and Category I precision approaches1 , as defined by ICAO in Annex 10 [RD-1]
Two EGNOS SoL Service levels (NPA and APV-I) were declared with the first issue of the EGNOS SoL SDD v1.0 in March 2011 and an additional one (LPV-200) was declared with the EGNOS SoL SDD v3.0 in September 2015 enabling the following SBAS-based operations in compliance with requirements as defined by ICAO in Annex 10 [RD-1]: • Non-Precision Approach operations and other flight operations supporting PBN navigation specifications other than RNP APCH, not only for approaches but also for other phases of flight. • Approach operations with Vertical Guidance supporting RNP APCH PBN navigation specification down to LPV minima as low as 250 ft. • Category I precision approach with a Vertical Alert Limit (VAL) equal to 35m and supporting RNP APCH PBN navigation specification down to LPV minima as low as 200 ft.
The European Union, as the owner of EGNOS system, the European GNSS Agency (GSA) as EGNOS Programme manager and ESSP SAS, as EGNOS services provider, expressly disclaim all warranties of any kind (whether expressed or implied) to any party, other than Aviation Users specified under 2.2.2 above [see below], and/or for any other use of the EGNOS SoL Service including, but not limited to the warranties regarding availability, continuity, accuracy, integrity, reliability and fitness for a particular purpose or meeting the users´ requirements. No advice or information, whether oral or written, obtained by a user from the European Union, GSA or ESSP SAS and its business partners shall create any such warranty.
[from para 2.2] EGNOS SoL signal covers also territories outside the EU. However, authorising and safety oversight of the use of EGNOS in civil aviation outside the EU falls within the sole responsibility of the respective third country. ESP will support the operational use of EGNOS based procedures via the signature of the EGNOS Working Agreement (EWA) provided that the level of safety at least equivalent to the Single European Sky requirements can be demonstrated by the interested parties on a case by case basis and that there is an agreement between the EU and the third country on the use of EGNOS SoL
The EWA includes ...... NOTAM Proposal Origination: Outlining the terms and conditions under which the ESSP SAS will provide EGNOS NOTAM proposals to the NOFs of the organisation providing Aeronautical Information Services (AIS) under the scope of a signed EWA
Too complicated Alex. We have arrived at the info we need to make flight decisions and know why we are making them:
1) Can you load the LPV approach from your on-board NAV system and do you have a plate? Yes? Then you could fly an SBAS approach which is not approved. Should you? What would Jesus do?
2) You cannot load an LPV or don’t have it on the plate: Fly the LNAV approach, which may also be RNP (so what?), using vertical guidance if available to help you fly your CDFA.
3) Fly the Baro-NAV approach to LNAV/VNAV minima if your aircraft is capable of this.
Is there some physical reason SoL service is no longer authorized for the UK? Is there a UK ground station that is no longer being utilized for corrections? Are the broadcast corrections now being limited to the EU airspace?
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Too complicated Alex. We have arrived at the info we need to make flight decisions and know why we are making them
The docs referenced above show no ground stations or coverage UK and NI, unsurprisingly. It is the RIM stations that monitor the geostationary satellites (4 now?), and correct, encode and transmit the SBAS signals to the satellites. Each approach has a specific EGNOS channel and reference, so how hard would it be for these to be delisted?
The docs referenced above show no ground stations or coverage UK and NI, unsurprisingly. It is the RIM stations that monitor the geostationary satellites (4 now?), and correct, encode and transmit the SBAS signals to the satellites. Each approach has a specific EGNOS channel and reference, so how hard would it be for these to be delisted?
Also interesting to note all the RIMS in non EU and arguably 3rd world countries who seem perfectly capable of having access to EGNOS from outside the EU….I feel an FOI request coming on here….
No signal still available - we are surrounded on 4 sides by people who are members of EGNOS…
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I also attach a link to a CAA document Alex had found.
This contradicts itself unfortunately.
http://www.publicapps.caa.co.uk/docs...l%20Slides.pdf
This contradicts itself unfortunately.
http://www.publicapps.caa.co.uk/docs...l%20Slides.pdf
