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GENERAL INFORMATION
Garmin GTN Navigators
The Garmin GTN navigation system is a GPS system with a Satellite Based
Augmentation System (SBAS), comprised of one or more Garmin TSO-C146c
GTN 625, 635, 650, 725, or 750 navigator(s) and one or more Garmin approved
GPS/SBAS antenna(s).
GTN system functions are shown in Table 1.
GPS SBAS Navigation
VHF Com Radio, 118.00 to 136.990, MHz, 8.33 or 25 kHz
increments
VHF Nav Radio, 108.00 to 117.95 MHz, 50 kHz increments
LOC and Glideslope non-precision and precision approach
guidance, 328.6 to 335.4 MHz tuning range
Moving map including topographic, terrain, aviation, and
geopolitical data
Display of datalink weather products, SiriusXM, Connext ( all
optional)
Display of terminal procedures data (optional)
Display of traffic data
Display of marker beacon annunciators (optional)
Remote audio panel control (optional)
Remote transponder control (optional)
Remote audio entertainment datalink control (optional
TSO-C194 HTAWS (optional)
Supplemental calculators and timers
Control of GSR 56 Iridium Satellite Phone and SMS Text
(optional)
The GPS navigation functions and optional VHF communication and navigation
radio functions are operated by dedicated hard keys, a dual concentric rotary
knob, or the touchscreen.
The GTN requires a reasonable degree of familiarity to avoid becoming too
engrossed at the expense of basic see-and-avoid in VMC. Garmin provides
training tools with the Pilot's Guide and PC based simulator. Pilots should take
full advantage of these training tools to enhance system familiarization.
RFMS, Bell 407 GTN GPS/SBAS System
FAA APPROVED
Table 1 – GTN Functions
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190-01007-J4 Rev. 1
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