Gps Specifications; Environmental Specifications; Antennas; Continued Airworthiness - Garmin G3X Installation Manual

5.6 GPS Specifications

The GDU 37X uses a high-sensitivity GPS receiver that continuously tracks and uses up to 12 satellites to
compute and update its position. In an installation with multiple GDU 37X units, each GDU can be
configured to use its own internal GPS receiver, or to receive GPS data transmitted by another GDU. At
least one GDU must be equipped with a GPS antenna. See
Characteristics
Acquisition Time
Update Rate
Positional Accuracy
Antenna Power Supply

5.7 Environmental Specifications

The GDU 37X has an Operating Temperature Range of -20°C to +60°C.

5.8 Antennas

Refer to Section 13 for antenna information

5.9 Continued Airworthiness

Maintenance of the GDU 37X is "on condition" only. Periodic maintenance of the GDU 37X is not
required. Instructions for Continued Airworthiness (ICA) are not required for this product under 14 CFR
Part 21 since the GDU 37X has received no FAA approval or endorsement.
G3X Installation Manual - GDU 37X Installation
Page 5-6
Table 5-2 GDU 37X GPS Specifications
a) Warm Start (position known to 10 nm, time known to 10 minutes, with
valid almanac and ephemeris): Less than 5 seconds
b) Cold Start (position known to 300 nm, time known to 10 minutes, with
valid almanac): Less than 45 seconds
c) AutoLocate™ (with almanac, without initial position or time): Less than 60
seconds
5/second, continuous
<10 meters
Voltage (4.5 to 5.0), current (50 mA max)
Section 17.3.13 for further information.
Specifications
190-01115-01
Rev. L