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Cirrus Perspective
™
by Garmin – Cockpit Reference Guide for the SR20/SR22
190-00821-02 Rev. A 65
Abnormal Operation
Flight
Instruments EIS
Nav/Com/
XPDR/Audio AFCS GPS Nav
Flight
Planning Procedures
Hazard
Avoidance
Additional
Features
Abnormal
Operation
Annun/
Alerts Appendix Index
DEAD RECKONING
While in Enroute or Oceanic phase of flight, if the Perspective
™
system detects an
invalid GPS solution or is unable to calculate a GPS position, the system automatically
reverts to Dead Reckoning (DR) Mode. In DR Mode, the Perspective
™
system uses its
last-known position combined with continuously updated airspeed and heading data
(when available) to calculate and display the aircraft’s current estimated position.
NOTE: Dead Reckoning Mode only functions in Enroute (ENR) or Oceanic
(OCN) phase of flight. In all other phases, an invalid GPS solution produces
a “NO GPS POSITION” annunciation on the map and the Perspective
™
system
stops navigating in GPS Mode.
DR Mode is indicated on the Perspective
™
system by the appearance of the letters
‘DR’ superimposed in yellow over the ‘own aircraft’ symbol as shown in the following
figure. In addition, ‘DR’ is prominently displayed, also in yellow, on the HSI slightly
above and to the right of the aircraft symbol on the CDI as shown in the following
figure. Also, the CDI deviation bar is displayed in yellow. Lastly, but at the same time,
a ‘GPS NAV LOST’ alert message appears on the PFD.
Normal navigation using GPS/WAAS source data resumes automatically once a
valid GPS solution is restored.
It is important to note that estimated navigation data supplied by the Perspective
™
system in DR Mode may become increasingly unreliable and must not be used as a
sole means of navigation. If, while in DR Mode, airspeed and/or heading data is also
lost or not available, the DR function is not be capable of estimating your position and,
consequently, the system may display a path that is different than the actual movement
of the aircraft. Estimated position information displayed by the Perspective
™
system
through DR while there is no heading and/or airspeed data available should not be
used for navigation.
DR Mode is inherently less accurate than the standard GPS/WAAS Mode due to the
lack of satellite measurements needed to determine a position. Changes in wind speed
and/or wind direction compounds the relative inaccuracy of DR Mode. Because of this
degraded accuracy, the crew must maintain position awareness using other navigation
equipment until GPS-derived position data is restored.
- Cirrus SR20 & SR22 1
- Blank Page 10
- Record of Revisions 11
- 190-00821-02 Rev. A i 13
- Table of Contents 14
- FLIGHT INSTRUMENTS 17
- Flight Instruments 19
- DISPLAYING WIND DATA 19
- ENGINE INDICATION SYSTEM 21
- ENGINE PAGE 22
- 190-00821-02 Rev. A 7 23
- Fuel Calculations Group 24
- Leaning Assist Mode 25
- TKS FIKI Anti-ice System 26
- SYSTEM DISPLAY 27
- 190-00821-02 Rev. A 13 29
- Nav/Com/XPDR/Audio Panel 30
- SELECTING A NAV RADIO 30
- NAV/COM TUNING 30
- DIGITAL CLEARANCE PLAYER 31
- FLIGHT DIRECTOR ACTIVATION 33
- VERTICAL MODES 34
- LATERAL MODES 35
- GPS NAVIGATION 37
- GPS Navigation 38
- ACTIVATE A STORED FLIGHT PLAN 38
- ACTIVATE A FLIGHT PLAN LEG 38
- STOP NAVIGATING A FLIGHT PLAN 39
- VERTICAL NAVIGATION (VNAV) 39
- FLIGHT PLANNING 43
- Flight Planning 44
- WAYPOINTS 45
- ANOTHER WAYPOINT 47
- DELETE A USER WAYPOINT 48
- CREATE A NEW FLIGHT PLAN 49
- Using the MFD 49
- Using the PFD 49
- INVERT AN ACTIVE FLIGHT PLAN 52
- STORE A FLIGHT PLAN 53
- EDIT A STORED FLIGHT PLAN 53
- COPY A FLIGHT PLAN 54
- DELETE A FLIGHT PLAN 54
- PROCEDURES 57
- Procedures 58
- ACTIVATE AN ARRIVAL LEG 58
- HAZARD AVOIDANCE 61
- 190-00821-02 Rev. A 47 63
- Hazard Avoidance 64
- Weather Products and Symbols 64
- TRAFFIC ADVISORY SYSTEMS 64
- TERRAIN-SVS 67
- Enable/Disable Aviation Data 67
- Terrain-SVS Inhibit 68
- Manual System Test 68
- TAWS Inhibit 70
- ADDITIONAL FEATURES 71
- The Perspective 72
- Additional Features 73
- TERMINAL PROCEDURE CHARTS 73
- SafeTaxi 73
- 190-00821-02 Rev. A 59 75
- Entering a Channel Directly 76
- Assigning Channel Presets 76
- Adjusting Volume 77
- ABNORMAL OPERATION 79
- Abnormal Operation 80
- UNUSUAL ATTITUDES 80
- DEAD RECKONING 81
- ANNUNCIATIONS & ALERTS 83
- CAUTION ALERTS 84
- ADVISORY ANNUNCIATIONS 85
- COMPARATOR ANNUNCIATIONS 86
- MESSAGE ADVISORY ALERTS 86
- AFCS ALERTS 87
- TERRAIN-SVS ALERTS 88
- TAWS ALERTS 89
- AURAL ALERTS 91
- DATABASE MESSAGE ADVISORIES 93
- GMA 347 MESSAGE ADVISORIES 95
- GIA 63W MESSAGE ADVISORIES 96
- GEA 71 MESSAGE ADVISORIES 98
- GRS 77 MESSAGE ADVISORIES 99
- Annunciations & Alerts 100
- GMU 44 MESSAGE ADVISORIES 101
- GDL 69/69A MESSAGE ADVISORIES 101
- GDC 74A MESSAGE ADVISORIES 102
- GCU 478 MESSAGE ADVISORIES 102
- GMC 705 MESSAGE ADVISORIES 103
- PTK FAIL 105
- APPENDIX 109
- Cirrus Perspective 110
- 190-00821-02 Rev. A 110
- 190-00821-02 Rev. A 111
- Appendix 112
- MFD SOFTKEY MAP 114
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