READ MORE Hayley Brewis, Suffolk 01284 386004 Amanda Calnan, Staffs 07812 151512 Russ Jones, Scotland 01337 858026 or 07713 621507 Katy Lee, Berkshire 07717 778097 David Marshall, Leics 01164 299213 Sean Walters, Surrey 07850 077055 PilotsAdvisoryGroup @balpa.org Log notices The latest information and safety notices READ MORE Pilots Advisory Group SN-2022/002: Global navigation satellite system outage leading to navigation/surveillance degradation The purpose of this safety notice is to raise awareness of the issue and to advise operators who may be impacted by the loss or degradation of GNSS signals. SD-2022/001: Offshore helicopter helideck operations The purpose of this safety directive is to replace and revoke SD-2020/003 and is made in the interests of safety of operations to offshore locations (helidecks) for the reasons set out in Chapters 10 and 14 of CAP 1145. Additionally, it is made in further response to the Air Accidents Investigation Branch (AAIB) Safety Recommendations 2003-133 and 135 issued following the accident to Eurocopter AS332L Super Puma G-BKZE at the West Navion drillship on 10 November 2001, and Safety Recommendation (SR) 2011-053 issued following the accident to Eurocopter EC225 LP Super Puma, G-REDU, when approaching the ETAP Central Production Facility platform on 18 February 2009. SW2022/117: UK AIP and chart format changes AIRAC 07/2022 To comply with regulatory requirements, changes will be made to the format of the UK AIP and Aeronautical Charts effective AIRAC 07/2022. SW2022/030: CAP 1926 The use of RNAV Substitution The CAA has published CAP 1926 containing general requirements and guidance material for the use of RNAV Substitution on UK routes and procedures. The CAP acknowledges the use of FMS Coded Overlays as an operating technique in lieu of primary reference to conventional ground-based navigation aids and as such, permits use of the technique on departures, arrivals and certain instrument approach segments, when coded in a navigation database, selected and executed. TECH LOG PILOTS ADVISORY GROUP