GPS 175
GNC® 355
GNX™ 375
The Garmin Compact IFR Navigators—GPS 175, GNX™ 375 and GNC® 355—offer WAAS GPS approaches, moving map and modern user interfaces in smaller packages. The right choice depends on how you fly and what you already have in the panel.
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- GPS 175 – Pure IFR GPS Slimline WAAS GPS navigator for IFR approaches, holds and procedures; pairs with existing transponder and radios.
- GNX™ 375– IFR GPS + ADS-B Transponder Combines IFR GPS navigation with a Mode S transponder that provides ADS-B Out (and In when configured), reducing box count in the panel.
- GNC® 355– IFR GPS + COM Radio Adds an integrated comm radio to the IFR GPS, ideal when you want a modern GPS and to replace an older comm unit at the same time
What These Navigators Give You
- WAAS IFR GPS Capability
- Support for RNAV (GPS) approaches with LPV minimums where published
- Flight plan management, direct-to, and advisory visual approaches in a compact form factor.
- Moving Map & Situational Awareness
- Color moving map with terrain, obstacles and nearest airports (screen layout varies by model).
- Integration with Existing Panel
- Drives course guidance to GI 275, G5 or mechanical indicators, and can feed traffic/weather from compatible ADS-B solutions.
Which One Fits Your Situation?
- You Already Have a Good Transponder and Radios
- GPS 175 is often the cleanest solution—add WAAS IFR GPS without changing much else.
- You Need ADS-B Out or Want to Simplify Boxes
- GNX™ 375 can replace both an older GPS and a transponder in one unit, freeing panel space.
- You Need a New Comm Radio Too
- GNC® 355 gives you IFR GPS plus a modern comm radio, often replacing an aging nav/comm stack.
Example Install Paths
- Budget-Friendly IFR Upgrade
- GPS 175 + G5 or GI 275 for guidance, using existing transponder and audio panel.
- All-in-One Upgrade
- GNX™ 375 + GI 275 or G5 + audio panel refresh, giving IFR GPS, ADS-B Out/In and modern displays.
- Radio & GPS Modernization
- GNC® 355+ GI 275 HSI for owners wanting a simpler, lighter panel with clear comm audio and modern navigation.
Installed and Certified by
Top Flight Avionics and The CERTMAN
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- Evaluating what you already own (radios, transponder, panel space, mission)
- Recommending repair vs replacement where appropriate
- Handling IFR checks, transponder/ADS-B performance tests and logbook documentation after the install