Garmin Software Version 0530.04 Betriebsanweisung PDF herunterladen (Seite 150)

Garmin G1000 Cockpit Reference Guide for the Cessna 350/400

190-00567-01 Rev. B

10-12

SECTION 10 – HAZARD

AVOIDANCE

Manual System Test

A system test is automatically performed at power-up.

After successful completion of the test, “TAWS System

Test, OK” will be heard.

The system test may also be initiated manually, but

only when the aircraft is on the ground. To manually verify

proper operation of the aural and visual annunciations

of the system, perform the following steps.

While the TAWS Page is displayed, press the

Key.

Turn the small

FMS

Knob to select ‘Test TAWS’.

Press the

ENT

Key. During the test ‘TAWS TEST’ is

displayed in the center of the TAWS Page.

When all is in working order, “TAWS System Test,

OK” will be heard.

Forward Looking Terrain Avoidance (FLTA)

The Forward Looking Terrain Avoidance alert is

composed of two sub-functions:

Reduced Required Terrain Clearance (RTC) and

Reduced Required Obstacle Clearance (

ROC)

This provides alerts when the aircraft ﬂight path

is above terrain and/or obstacles, yet is projected to

come within minimum clearance values outlined in the

following table. When an RTC or ROC alert is issued, a

potential impact point is displayed on the TAWS Page as

a yellow or red ‘X’.

Imminent Terrain Impact (

ITI) and Imminent

Obstacle Impact (IOI)

This provides alerts when the aircraft is below the

elevation of terrain in the aircraft’s projected path. ITI and

IOI alerts are accompanied by a potential impact point

displayed on the TAWS Page as a yellow or red ‘X’. The

alert is given when the projected vertical ﬂight path is

calculated to come within minimum clearance altitudes

in the following table.

Phase of Flight Level Flight Descending

Enroute 700 ft 500 ft

Terminal 350 ft 300 ft

Approach 150 ft 100 ft

Departure 100 ft 100 ft

During the ﬁnal approach phase of ﬂight, RTC/ROC/

ITI/IOI alerts are automatically inhibited when the aircraft

is below 200 feet AGL while within 0.5 nm of the approach

runway or is below 125 feet AGL while within 1 nm of the

runway.

Premature Descent Alert (PDA)

A Premature Descent Alert is issued when the system

detects that the aircraft is signiﬁcantly below the normal

approach path to a runway. The PDA alert mode functions

only during descent to land.

PDA alerting begins when the aircraft is within 15

nm of the destination airport and ends when the aircraft

is either 0.5 nm from the runway threshold OR is at

an altitude of 125 feet AGL while within 1 nm of the

threshold. During the ﬁnal descent, algorithms will set a

threshold for alerting based on speed, distance, and other

parameters.

700

600

500

400

300

200

100

Height Above Terrain (Feet)

Distance From Destination Airport (nm)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

“Too Low, Terrain”“Too Low, Terrain”

Runway

Threshold

Figure 10-18 PDA Alerting

1 2 ... 145 146 147 148 149 150 151 152 153 154 155 ... 185 186

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