SBAS Offshore Approach ProcedureSBAS Offshore Approach ProcedureSBAS Offshore Approach ProcedureSBAS Offshore Approach Procedure

Philip Church, Helios

Aerodays 2011, Bratislava Room, 30 March 2011

SCOPESCOPESCOPESCOPE

�SOAP procedure

�Equipment

integration

�Flight trial results

�Future steps

SBAS Offshore Approach Procedure SBAS Offshore Approach Procedure SBAS Offshore Approach Procedure SBAS Offshore Approach Procedure (SOAP)(SOAP)(SOAP)(SOAP)

�Developed as a safety enhanced procedure

relative to the current ARA and GPS approach procedures

�Benefits include:• less reliance on weather radar

• high navigation accuracy

• provides independent cross-checkagainst existing altimeters

• allows a “straight in” procedure

from final to missed approach

• gives much lower crew workload

SOAP Approach ProfileSOAP Approach ProfileSOAP Approach ProfileSOAP Approach Profile

30°FAF

IAFMAP

Rig

Horizontal Profile

Vertical Profile

MAP

FAF IAF

4°or 6°

Offset

distance,

0.25NM

Final Approach SegmentInitial Approach Segment

Arrival Segment

Level segment

0.75NMMSA,

1500ft50ft

Deck height

MDR, 0.5NM min

MDH, min 200ft, 300ft

during

darkness

2 NM

Missed Approach Segment

30°FAF

IAFMAP

Rig

Horizontal Profile

Vertical Profile

MAP

FAF IAF

4°or 6°

Offset

distance,

0.25NM

Final Approach SegmentInitial Approach Segment

Arrival Segment

Level segment

0.75NMMSA,

1500ft50ft

Deck height

MDR, 0.5NM min

MDH, min 200ft, 300ft

during

darkness

2 NM

Missed Approach Segment

SOAP EGNOS guidanceSOAP EGNOS guidanceSOAP EGNOS guidanceSOAP EGNOS guidance

MAP

FAF IAF

4 NM min

1500ft

200ft below

MDH

Linear sensitivity

Vertical sensitivity focus

MDH

Angular splay GPA/4 ≈ ILS

sensitivity

FAF

MAP

Rig

Abeam point

Lateral sensitivity focus

Linear sensitivity

Angular sensitivity

10,000ft

2°2°

+/- 0.3NM

SOAP Equipment IntegrationSOAP Equipment IntegrationSOAP Equipment IntegrationSOAP Equipment Integration

BackBackBackBack----End PalletEnd PalletEnd PalletEnd Pallet

AIS receiver

GNSS receiver

Development and logging laptop

ARINC 429

serial

converter

Flight Crew InstallationFlight Crew InstallationFlight Crew InstallationFlight Crew Installation

Instrument display

Blanking plate

OnOnOnOn----Board InstallationBoard InstallationBoard InstallationBoard Installation

Rear pallet installed

Flight crew display

installed

Flight Crew DisplayFlight Crew DisplayFlight Crew DisplayFlight Crew Display

Flight TrialsFlight TrialsFlight TrialsFlight Trials

Flight Schedule ApproachesFlight Schedule ApproachesFlight Schedule ApproachesFlight Schedule ApproachesFlight # Approach # Descent slope Wind LDG/GA Approach #

1

1 4° Into GA Data lost

2 6° Out of GA 1444

3 4° Out of LDG 1459

4 Pilot choice Pilot choice Pilot choice 1513

2

1 4° Into GA Data lost

2 6° Out of GA 1024

3 4° Out of LDG 1039

4 Pilot choice Pilot choice Pilot choice 1058

3

1 4° Into GA 1322

2 6° Out of GA 1334

3 4° Out of LDG 1353

4 Pilot choice Pilot choice Pilot choice 1407

Lateral Path DeviationsLateral Path DeviationsLateral Path DeviationsLateral Path Deviations

0

50

100

150

200

250

1 7

13

19

25

31

37

43

49

55

61

67

73

79

85

91

97

103

109

115

121

127

133

139

145

151

157

163

169

175

181

187

193

199

205

211

217

223

229

235

241

247

253

259

265

271

277

283

289

295

301

Erro

r i

n m

etre

s

1024 1039 1058 1322 1334 1353 1407 1444 1459 1513

Vertical Path DeviationsVertical Path DeviationsVertical Path DeviationsVertical Path Deviations

0

10

20

30

40

50

60

70

1 7

13

19

25

31

37

43

49

55

61

67

73

79

85

91

97

103

109

115

121

127

133

139

145

151

157

163

169

175

181

187

193

199

205

211

217

223

229

235

241

247

253

259

265

271

277

283

289

295

301

Erro

r i

n m

etre

s

1024 1039 1058 1322 1334 1353 1407 1444 1459 1513

Flight Path ErrorsFlight Path ErrorsFlight Path ErrorsFlight Path Errors

� Lateral Deviations

�Vertical Deviations

1444 1459 1513 1024 1039 1058 1322 1334 1353 1407 Overall

Mean 30.79 56.64 34.97 49.18 27.97 10.87 33.45 8.06 15.73 11.91 26.93

Max 88.53 230.19 164.36 150.07 121.94 60.11 72.97 42.27 48.80 23.05 230.19

Standard

deviation23.49 72.35 38.20 45.60 26.36 7.90 18.80 7.58 13.29 6.36 35.22

1444 1459 1513 1024 1039 1058 1322 1334 1353 1407 Overall

Mean 17.03 11.77 11.03 9.03 9.54 12.88 9.10 9.97 10.12 18.26 11.80

Max 65.97 25.48 28.75 23.60 20.95 24.30 19.07 27.25 36.71 33.28 65.97

Standard

deviation20.39 7.51 7.63 6.58 7.03 6.89 5.14 8.55 11.90 9.37 10.01

In conclusion, SOAP was successfully validated

�Flight crew agreed that SOAP is more precise than existing low visibility options

�Horizontal and vertical track keeping is precise but could be improved with changes to HMI

�Crew comments proposed some improvements to the HMI

�Further work in the area will be undertaken• UK CAA sponsoring HMI enhancements and

additional flight trials in June

http://hedge.askhelios.com

Any Questions?

philip.church@askhelios.com

The HEDGE project has received Community research funding under the 7th Framework Programme

This material reflects only the author’s views and the Community and the GSA are not liable for any use that may be made of the information contained herein