Garmin Software Version 0563.05 User's Guide Page 161
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Garmin G1000 Cockpit Reference Guide for the Cessna Nav III
190-00384-08 Rev. A
SECTION 11 – ABNORMAL
OPERATION
11-3
11.6 DEAD RECKONING
WARNING: DR Mode is inherently less accurate
than the standard GPS/WAAS Mode due to the
lack of satellite measurements needed to deter-
mine a position. Changes in wind speed and/or
wind direction compound 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.
While in Enroute or Oceanic phase of flight, if the
G1000 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 G1000
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 G1000 stops navigating in GPS
Mode.
DR Mode is indicated on the G1000 by the appearance
of the letters ‘DR’ superimposed in yellow over the ‘own
aircraft’ symbol as shown in Figure 11-4. 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 Figure 11-4. Also, the CDI deviation bar
is removed from the display. 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 G1000 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
may not be capable of accurately tracking your estimated
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 G1000
through DR while there is no heading and/or airspeed
data available should not be used for navigation.
Figure 11-4 Dead Reckoning Indications
Symbolic Aircraft
(Map pages and Inset Map)
CDI ‘DR’ Indication on PFD
As a result of operating in DR Mode, all GPS-derived
data is computed based upon an estimated position and is
displayed as yellow text on the display to denote degraded
navigation source information. This data includes the
following:
• Navigation Status Box fields except Active Leg, TAS,
and DTK
• GPS Bearing Pointer
• Wind data and pointers in the Wind Data Box on
the PFD and MFD
• Track Bug
• All Bearing Pointer Distances
• Active Flight Plan distances, bearings, and ETE
values
- Integrated Flight Deck 1
- WARNINGS 4
- CAUTIONS, & NOTES 4
- RECORD OF REVISIONS 7
- TABLE OF CONTENTS 10
- SECTION 1: SYSTEM OVERVIEW 13
- 1.1 PFD/MFD CONTROLS 14
- SECTION 1 15
- SYSTEM OVERVIEW 15
- 1.2 PFD SOFTKEYS 17
- 1.3 MFD SOFTKEYS 20
- RST FUEL 20
- 1.4 MFD PAGE GROUPS 21
- 1.5 VERTICAL NAVIGATION 22
- 1.6 BACKLIGHTING 24
- 1.8 DATABASE UPDATES 24
- Garmin Databases 25
- SECTION 2: FLIGHT INSTRUMENTS 27
- SECTION 2 28
- FLIGHT INSTRUMENTS 28
- 2.1 AIRSPEED INDICATOR 29
- 2.2 ATTITUDE INDICATOR 29
- 2.3 ALTIMETER 30
- Metric Display 31
- Low Altitude Annunciation 31
- GLIDESLOPE INDICATOR 32
- 2.6 VERTICAL SPEED INDICATOR 33
- Course Pointer 35
- Approach 36
- DME (optional) 37
- Navigation Source 37
- 2.9 WIND DATA 38
- 2.10 GENERIC TIMER 39
- SECTION 3: ENGINE INDICATION 41
- SYSTEM (EIS) 41
- SECTION 3 – ENGINE 42
- INDICATION SYSTEM (EIS) 42
- 3.2 LEAN DISPLAY 44
- 3.3 SYSTEM DISPLAY 47
- SECTION 4: NAV/COM AND 51
- TRANSPONDER 51
- SECTION 4 – NAV/COM & 52
- 4.1 RADIO STATUS INDICATIONS 53
- 4.2 VOLUME 53
- 4.3 AUTOMATIC SQUELCH 53
- 4.5 OPTIONAL NAV RADIOS 53
- 4.6 FREQUENCY AUTO-TUNING 54
- 4.7 TRANSPONDER 54
- Reply Status 55
- Code Selection 55
- Flight ID Reporting 56
- SECTION 5: AUDIO PANEL 57
- 5.1 COM RADIO SELECTION 58
- 5.2 CABIN SPEAKER 58
- (T)182T AND (T)206H ONLY 58
- 5.4 MARKER BEACON RECEIVER 58
- SECTION 5 – AUDIO PANEL 59
- 5.7 INTERCOM SQUELCH CONTROL 60
- AND PLAYER 60
- SECTION 6: AUTOMATIC FLIGHT 61
- Command Bars 62
- 6.3 FLIGHT DIRECTOR MODES 63
- SECTION 6 – AUTOMATIC 64
- FLIGHT CONTROL 64
- Roll Modes 77
- 6.4 AUTOPILOT OPERATION 82
- Control Wheel Steering 83
- Disengaging the Autopilot 83
- 6.5 EXAMPLE PROCEDURES 84
- Departure 85
- Intercepting a VOR Radial 86
- Go Around/Missed Approach 93
- AFCS Status Alerts 94
- Overspeed Protection 95
- SECTION 7: NAVIGATION 97
- SECTION 7 – NAVIGATION 100
- 7.4 AIRPORT INFORMATION 117
- 7.5 INTERSECTION INFORMATION 119
- 7.6 NDB INFORMATION 120
- 7.7 VOR INFORMATION 120
- 7.9 NEAREST AIRPORTS 121
- 7.10 NEAREST INTERSECTIONS 122
- 7.11 NEAREST NDB 123
- 7.12 NEAREST VOR 123
- 7.13 NEAREST USER WAYPOINT 124
- 7.14 NEAREST FREQUENCIES 124
- 7.15 NEAREST AIRSPACES 125
- SECTION 8: FLIGHT PLANNING 127
- Map Page 128
- SECTION 8 – FLIGHT PLANNING 129
- 8.7 CREATE A NEW FLIGHT PLAN 130
- 8.18 DELETE A FLIGHT PLAN 134
- 8.20 TRIP PLANNING 134
- SECTION 9: PROCEDURES 137
- 9.2 APPROACHES 138
- SECTION 9 – PROCEDURES 139
- SECTION 10: HAZARD AVOIDANCE 141
- Stormscope Page 142
- Airport Information Page 143
- SECTION 10 – HAZARD 144
- AVOIDANCE 144
- Weather Product Age 146
- ADS-B Traffic (Optional) 149
- 1000' 150
- Aircraft Altitude 150
- 100' Threshold 150
- Navigation Map 151
- Enable/Disable Aviation Data 152
- TAWS Inhibit 152
- Manual System Test 153
- Premature Descent Alert (PDA) 153
- Pop-up Alerts 155
- TAWS Alerts Summary 156
- Alert Annunciations 157
- SECTION 11: ABNORMAL 159
- OPERATION 159
- SECTION 11 – ABNORMAL 160
- 11.6 DEAD RECKONING 161
- SECTION 12 – ANNUNCIATIONS 163
- & ALERTS 163
- 12.1 ALERT LEVEL DEFINITIONS 164
- 12.2 NAV III AIRCRAFT ALERTS 165
- 12.3 CO GUARDIAN MESSAGES 165
- 12.4 AFCS ALERTS 166
- 12.5 TAWS ALERTS 167
- Database Message Advisories 173
- GMA 1347 Message Advisories 175
- GIA 63 Message Advisories 175
- GIA 63W Message Advisories 178
- GEA 71 Message Advisories 180
- GTX 33 Message Advisories 181
- GRS 77 Message Advisories 181
- GMU 44 Message Advisories 182
- GDL 69A Message Advisories 182
- GDC 74A Message Advisories 182
- Blank Page 188
- 190-00384-08 Rev. A 190
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