Garmin GPS Receiver 400/500 User Manual download pdf (Page 49)

Section 3

TERRAIN Alerts

TERRAIN Failure Alert

The TERRAIN system continually monitors several system-critical items, such as database validity,

hardware status, and GPS status. Should the system detect a failure, a message is annunciated ‘TERRAIN

has failed’ (Figure 3-5).

‘TERRAIN Not Available’ Alert

The TERRAIN system requires a 3D GPS navigation solution along with speciﬁc vertical accuracy

minimums. Should the navigation solution become degraded, if the terrain/obstacle database is not

available, or if the aircraft is out of the database coverage area, the annunciation ‘TERRAIN NOT

AVAILABLE’ is displayed on the TERRAIN Page (Figure 3-6).

Figure 3-5: ‘TERRAIN has failed’ message

Figure 3-6: ‘TERRAIN NOT AVAILABLE’ display

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400/500 Series 1
Garmin Optional 1
Displays 1
Foreword 2
INTRODUCTION 3
Warnings and Cautions 3
Contents 4
Table of Contents 5
PART ONE: 9
TIS Limitations 10
TIS Symbology 12
Trafﬁc Ground Track 14
Trafﬁc Warning Window 14
Trafﬁc Page 14
Trafﬁc Page Display Range 14
Map Page 15
Introduction 17
Power-Up Test 17
(to display TIS trafﬁc): 18
Weather Products 19
How it Works: 19
NEXRAD Description 20
NEXRAD Abnormalities 20
NEXRAD Limitations 20
NEXRAD Intensity 21
Requesting NEXRAD Data 22
Section 3 23
NEXRAD Operation 23
The Weather Page 24
‘Low’ mode 25
Request Shortcuts 26
To Send Your Position: 27
Section 4 28
METAR Operation 28
Section 4: METAR Operation 28
Section 5 32
Monitoring the Data Link 33
GDL 49 Datalink Status 34
GDL 69/69A Datalink Status 35
Section 6 36
Troubleshooting 36
Overview 37
Operating Criteria 37
Limitations 39
To display a 120˚ view: 40
To change the display range: 41
To inhibit TERRAIN: 41
To enable TERRAIN: 42
General Database Information 43
Database Versions 43
Database Updates 43
Navigation Database 44
TERRAIN Destination Airport 45
Pop-up Alerts 46
Enroute 700 ft. 500 ft 47
Terminal 350 ft. 300 ft 47
Approach 150 ft. 100 ft 47
Departure 100 ft. 100 ft 47
PDA Alert is 48
0.7 Below Glideslope 48
TERRAIN Failure Alert 49
‘TERRAIN Not Available’ Alert 49
TERRAIN Alert Summary 50
Power Up 54
TAWS Page 54
To inhibit TAWS: 56
To enable TAWS: 56
TAWS Manual Test 57
TAWS Symbols 58
Color Interpretation 58
TAWS Destination Airport 61
1. Press the CLR button 62
1. Press the ENT button 62
"PULL UP"" 65
"DON'T SINK" 66
‘Five-Hundred’ Aural Alert 67
TAWS Failure Alert 67
TAWS Not Available Alert 67
TAWS Alerts 68
Appendix A 71
Forecast Abbreviations 71
METAR Graphics 72
Wind Speed 73
Temperature - Dew Points 74

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Garmin GPS Receiver 400/500 User Manual Page 49

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