Garmin GDL 88 User Guide - Page 27

Up to 1000, RA or HAT, Approach, Terminal, Geodetic, Below, Above 42,000, Above

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Radar Altitude (RA) or Height Above Terrain (HAT) GPS Phase RA, HAT, and Sensitivity of Flight GPS Flight Level Phase Not Available LookAhead Time(s) Vertical Threshold for Alarm (feet) Minimum Protected Volume (NM) (if Available) OR GPS Phase of Flight Not Approach or Terminal Up to 1000 Approach N/A 2 20 850 0.20 (RA or HAT) 1000-2350 Terminal N/A 3 25 850 0.20 (RA or HAT) 2350-5000 (Geodetic) Below 4 5000 (Geodetic) 30 850 0.35 5000-10,000 (Geodetic) 5000- 5 10,000 (Geodetic) 40 850 0.55 10,00020,000 10,000- 6 20,000 45 850 0.80 (Geodetic) (Geodetic) 20,00042,000 20,000- 7 42,000 48 850 1.10 (Geodetic) (Geodetic) Above 42,000 (Geodetic) Above 8 42,000 (Geodetic) 48 1200 1.10 Table 4-2 Traffic Alert Functionality 190-01122-03 Rev. A GDL 88 ADS-B Transceiver Pilot's Guide 4-7

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4-7
190-01122-03
Rev. A
GDL 88 ADS-B Transceiver Pilot’s Guide
Radar Altitude
(RA) or Height
Above Terrain
(HAT)
(if Available)
GPS Phase
of Flight
RA, HAT, and
GPS Flight
Phase Not
Available
OR
GPS
Phase of
Flight Not
Approach or
Terminal
Sensitivity
Level
Look-
Ahead
Time(s)
Vertical
Threshold
for Alarm
(feet)
Minimum
Protected
Volume
(NM)
Up to 1000
(RA or HAT)
Approach
N/A
2
20
850
0.20
1000-2350
(RA or HAT)
Terminal
N/A
3
25
850
0.20
2350-5000
(Geodetic)
Below
5000
(Geodetic)
4
30
850
0.35
5000-10,000
(Geodetic)
5000-
10,000
(Geodetic)
5
40
850
0.55
10,000-
20,000
(Geodetic)
10,000-
20,000
(Geodetic)
6
45
850
0.80
20,000-
42,000
(Geodetic)
20,000-
42,000
(Geodetic)
7
48
850
1.10
Above 42,000
(Geodetic)
Above
42,000
(Geodetic)
8
48
1200
1.10
Table 4-2
Traffic Alert Functionality