Thanks, this is worth clarifying. As Alex mentions this is worth explaining properly - below is a holding message to wet your appetite. I will provide the full explanation interfrastically.
Originally Posted by
Torquetalk
ICAO does not have jurisdiction, the competent authority in each country does. And it can deviate from ICAO as it sees fit.
Yes, completely correct. The CAA can deviate if it sees fit BUT it must inform ICAO as a contracting state (thank you Alex for a good education at your establishment!). A summary of the non-conformities is published helpfully on the net.
GEN 1.7 DIFFERENCES FROM ICAO STANDARDS, RECOMMENDED PRACTICES AND PROCEDURES (nats.co.uk)
Scroll to the bottom to the section entitled Doc 8168 - Procedures for Air Navigation Services — Aircraft Operations Vol I (Flight Procedures) (4th Edition).
Check the list for the following paragraph number in Vol 1....para 5.4.4.2. You won't find it which means your instrument procedure is designed to that standard in the UK.
And what does 5.4.4.2 say? Ta da! If you look in the FLM supplement for your particular nav equipment it will indicate whether your device is certified to take advantage of this.
Originally Posted by
Torquetalk
What is needed is a reference to the UK CAA permitting SBAS for LNAV/VNAV guidance, even for baro approaches, and even though it now has no agreement in place with the authority which provides the signal. The Open Skies principle will not suffice for this; ditto SoL, which is merely a standard anyway.
CAA has permitted it in accordance with conformity with ICAO SARPS above. As per the following document
"...UK businesses and organisations are able to use the freely available ‘open’ signal to develop products and services for consumers, and can use the open position, navigation and timing services provided by Galileo and EGNOS." but "...Any UK users of the EGNOS Safety of Life (SoL) service should make preparations for mitigating the loss of this service from 25 June 2021." SoL signal is only required for LPV (it is very specific - further explanation later) not for LNAV/VNAV and SBAS in general.
UK involvement in the EU Space Programme - GOV.UK (www.gov.uk)
Originally Posted by
Torquetalk
Perhaps it would be helpful if you could paste in, or at least reference, exactly the pertinent passages of the regulations you are referring to. That would prove the point and stop each ppruner scuttling off to scour the regs.
Holding explanation above - detail to follow.
Originally Posted by
Torquetalk
Once these NOTAMS get worked into the AIP, assuming the matter is not promptly resolved, an update of your Garmin database will simply see the SBAS option disappear for all UK airfields. That could be in about 56 days time. Or 28 if they are really snappy.
Not quite. The next AIRAC is 8 days away, so probably then (25 June 2021 fell midway between AIRAC hence NOTAMs required). You will probably see the LPV minima disappear leaving LNAV/VNAV minima where provided (eg Cardiff). As highlighted above SBAS can be used for LNAV/VNAV. Longer explanation to follow once I extract the info from the remaining regulations.