1. PlaneWrong AGM Thursday 13th October

2. The Civil Aviation Authority – Our Role
The CAA. UK's independent aviation regulator.
CAA regulatory activities range from making sure that the aviation industry meets the highest safety, operational and technical standards, to preventing holidaymakers from being stranded abroad or losing money because of tour operator insolvency.
Airspace is one of the key roles of the CAA.
CAA own the Airspace Change Process under which change proposals are submitted by sponsors for approval; CAA don’t own proposals.
Operate under the auspices of the Government’s Transport Act 2000, Directions to the CAA (signed by both the Secretary of State for Transport and the Secretary of State for Defence) and within Environmental Guidance issued by the DfT (last amended in February 2014). DfT provide the Policy.
Airspace Change Process and the Guidance for it set out in Civil Aviation Publications 724 and 725 (currently consulting upon changes).

3. Revised Route 4 6 Month Review

4. Revised Route 4 – 6 Month Review
Post Implementation Review (PIR) of Gatwick Airports Limited’s (GAL) RNAV SID replication of the existing conventional departure routes concluded that Routes 2, 4 and 5 required revision.
The revised Route 4 design, using principles established by To70 for the first turn, implemented 26th May, monitored for 6 months.
End of the 6 months revised design will remain operational whilst the CAA considers the data collected during monitoring. 
The CAA will aim to publish its decision whether or not the modified design is acceptable as soon as possible; expected within 3-4 months. 

5. Revised Route 4 – 6 month Review
The objective of the re-design is set out in CAA letter to GAL dated 23rd May 2016 which is available on CAA website.
CAA will assess where the data shows aircraft are flying and whether they are flying where designers anticipated
CAA will use radar data and the feedback received from local residents
GAL are required to collect and collate data, before providing it to CAA
CAA aware of A380 ‘turning tight’ due to low speed. GAL engaging with the airline

6. Path Termination Instrument Flight Procedures (IFP)

7. Path Termination - IFP
How does the aircraft know what to do between waypoints?
Industry has defined a set of actions which:
Tells the aircraft what to fly:
Track
Course
Heading
Direct
What success factor must be met to complete the action:
Altitude
Distance
Next fix
etc

8. Use Of Path Terminators
Available Path Terminators are defined in ICAO PBN Manual - Navigation Specifications e.g. RNAV 1
A terminal Airspace RNAV 1 procedure will have associated with the chart depiction, a coding table defining the Path Terminators to be used, there order to be sequenced and any constraints (speed, altitude)
It is the coding table loaded into the airborne navigation data base and then executed by the FMS that provides the functional path definition to the aircraft’s flight guidance (path steering) system

9. Path Terminators - IFP Path
ARINC 424 industry standards define Path Terminators
Not all Path Terminators are used in PBN
Path Terminators may be different or not enabled in some aircraft
Path F
Course from a fix to
Course to C
Direct Track D
Holding pattern H
Constant radius R
Constant DME arc A
Initial I
Heading to V
Track between T
Terminator A
Altitude C
Distance I
Next leg M
Manual termination R
Radial termination D
DME distance F
Fix

10. Waypoint Transitions
Fly-over
Fly-by

11. Fly-by Transition Most common turn performance
Computer calculates bank angle required to intercept next track based on a variety of parameters:
Wind
Speed
Angle of Turn (α)
etc
Computer calculates point to initiate turn, max >20NM (Y) before WPT
Avionics applies calculated Bank Angle
Different aircraft will initiate turn at different points inbound the active WPT (Transition Area) Y α
Transition Waypoint R
Fly By Transition
Area

12. Turn Anticipation
Variable for ambient conditions (effect of wind on ground speed), altitude, angle of turn, bank angle authority, phase of flight, avionics, and aircraft

13. Course to Fix A
080
CF Leg
Course is flown making adjustment for wind

14. Track to a Fix B
TF Leg A

15. RWY 26L LAM 1X Wraparound Turn

16. Coding Table for RWY 26L LAM 1X – “Old” Route 4
PBN Specification
Leg Transitions – All Fly-by
Path Terminator Sequence

18. RWY 26L LAM 2X Wraparound Turn

19. Coding Table for RWY 26L LAM 2X – “Current” Route 4
Second path Terminator in the sequence is now a CF having on the previous leg flown-over (Fly-over) KKW02

21. Tracks from GAL Route 4 Blog

22. Thank you