Page 1 GPS 175/GNX 375 Pilot's Guide...
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Page 3: Table Of Contents
2.9.2 Enabling Extended Squitter Transmissions ......... 2-17 2.9.3 Assigning a Flight ID ................. 2-18 2.10 XPDR Modes ..................2-19 2.11 Squawk Code Keys ................2-20 2.11.1 VFR ....................2-20 2.11.2 IDENT .................... 2-20 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 4 3.2.2 Map Orientation ................3-14 3.2.3 North Up Above ................3-15 3.2.4 Visual Approach ................3-15 3.2.5 TOPO Scale ..................3-15 3.2.6 Range Ring ..................3-16 3.2.7 Track Vector ..................3-16 3.2.8 Ahead View ..................3-16 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 5 4.5 RAIM Prediction Page ................4-11 4.5.1 Calculating RAIM Status ..............4-12 4.5.2 RAIM Status Indications ..............4-12 5 HAZARD AWARENESS ..................... 5-1 Weather Awareness ..........................5-3 5.1 Data Transmission Limitations ..............5-3 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 6 Advisory Messages ..........................6-2 6.1 Message Key ..................... 6-2 6.2 Airspace Advisories ................... 6-3 6.3 Database Advisories .................. 6-4 6.4 Flight Plan Advisories ................6-5 6.5 GPS/WAAS Advisories ................6-6 6.6 Navigation Advisories ................6-8 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 7 6.8 Terrain Advisories ..................6-11 6.9 Traffic System Advisories ................. 6-12 6.10 VCALC Advisories ................. 6-13 6.11 Waypoint Advisories ................6-13 7 QUALIFICATION ........................7-1 7.1 Glove Qualification ................... 7-1 8 GLOSSARY ..........................8-1 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 8 INTENTIONALLY LEFT BLANK GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 9 Warnings, Cautions, and Notes WARNING DO NOT USE TERRAIN AVOIDANCE DISPLAYS AS THE SOLE SOURCE OF INFORMATION FOR MAINTAINING SEPARATION FROM TERRAIN AND OBSTACLES. GARMIN OBTAINS TERRAIN AND OBSTACLE DATA FROM THIRD PARTY SOURCES AND CANNOT INDEPENDENTLY VERIFY THE ACCURACY OF THE INFORMATION.
Page 10 OF 70° NORTH LATITUDE BETWEEN LONGITUDE 85° E. AND 114° E. (NORTHERN RUSSIA); SOUTH OF 55° SOUTH LATITUDE BETWEEN LONGITUDE 120° E. AND 165° E. (REGION SOUTH OF AUSTRALIA AND NEW ZEALAND). viii GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 11 DO NOT CLEAN DISPLAY SURFACES WITH ABRASIVE CLOTHS OR CLEANERS CONTAINING AMMONIA. THEY WILL HARM THE ANTI-REFLECTIVE COATING. CAUTION ENSURE THAT ANY UNIT REPAIRS ARE MADE BY AN AUTHORIZED GARMIN SERVICE CENTER. UNAUTHORIZED REPAIRS OR MODIFICATIONS COULD VOID BOTH THE WARRANTY AND AFFECT THE AIRWORTHINESS OF THE AIRCRAFT.
Page 12 Do not use SafeTaxi functions as the basis for ground maneuvering. SafeTaxi functions do not comply with the requirements of AC 120-76C and are not qualified for use as an airport moving map display. SafeTaxi is to be used for orientation purposes only. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 13 Warnings, Cautions, and Notes NOTE The FAA has asked Garmin to remind pilots who fly with Garmin database-dependent avionics of the following: • It is the pilot’s responsibility to remain familiar with all FAA regulatory and advisory guidance and information related to the use of databases in the National Airspace System.
Page 14 Procedure in the navigation database DOES NOT imply specific FAA authorization to fly the procedure. AC 90-100A Statement of Compliance The Garmin navigational unit meets the performance and functional requirements of FAA Advisory Circular (AC) 90-100A, U.S. Terminal and En Route Area Navigation (RNAV) Operations.
Page 15 Navigation Planning Hazard Awareness Messages Qualification Glossary Electronic Document Features Versions of this guide are saved in Adobe Acrobat and are available for download at: garmin.com/manuals 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide xiii...
Page 16 Reference Documentation Reference Manuals DOCUMENT Reference Websites WEBSITE ADDRESS Aviation Limited Warranty https://www.garmin.com/en-US/legal/aviation-limited-warranty Go to http://www.flygarmin.com/support and select Database Concierge Database Management. ADS-B Academy https://www.garmin.com/us/intheair/ads-b Connext http://www.garmin.com/connext GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 17: System At A Glance
Control Knobs ..................1-11 1.6.1 Knob Function Indicators ..............1-11 1.6.2 Screen Captures ................1-12 Color Conventions................1-13 COMPATIBLE EQUIPMENT Line Replaceable Units ...............1-14 1.8.1 ADC & AHRS ................1-15 1.8.2 Altitude Encoder................1-15 1.8.3 Connext Services ................1-16 1.8.4 Traffic...................1-16 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 18: Overview
System at a Glance Overview The GPS 175 and GNX 375 are the first 2” by 6.25” panel mount navigators to employ full color capacitive touchscreen technology. The GPS 175 is a TSO-C146e compliant GPS/WAAS navigator with en route, terminal, and precision/non-precision approach capabilities. The GNX 375 combines the functionality of the GPS 175 with a TSO-C112e (Level 2els, Class 1) compliant mode S transponder.
Page 19: Display Layout
Interface for loading database, exporting log files, and updating software. Compatibility with Flight Stream 510 allows wireless database transfer from the Garmin Pilot app via Database Concierge. Power/Home Key Powers the unit on or off and provides direct access to the Home page.
Page 20: Unit Functions
Database Concierge Access [3] • Function availability dependent upon aircraft interfaces or enablement. ADS-B In via 1090 MHz (traffic) and 978 MHz UAT (traffic and weather). Requires Wi-Fi connection via Flight Stream 510. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 21: Pilot Interface
Tapping Continue advances to the Instrument Test page. If an instrument remains flagged after one minute, check the status of the associated LRU, then contact a Garmin dealer for support. 1.3.1 Instrument Test To ensure safe operation, continuous built-in test features exercise the unit’s processor, memory, external inputs, and outputs.
Page 22: Sd Card Slot
Hold card such that label faces left edge of display screen. Ensure back edge of card is flush with display bezel after insertion. EJECT AN SD CARD Release the spring latch by pressing lightly on the back edge of card. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 23: Touchscreen
PINCH & STRETCH then bring the fingers close together (pinch) or spread them apart (stretch). Just remember: stretch to zoom in and pinch to zoom out. Use this gesture for: Magnifying map features • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 24: Keys
The current state of the function is indicated below the key label. PAGE ICONS Tapping one of these icons opens the corresponding page. Menu pages provide additional icons for accessing functions on subpages. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 25: Menus
When scrolling, all keys in the list are inactive. Toggle keys either enable or disable list items. In some cases, Settings or Range keys provide access to selectable setting options. Scroll Bar 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 26: Tabs
Alphanumeric keypads comprise multiple keysets that are accessible by way of swipe or key selection. Selectable Keysets An indicator shows which keyset is active. Keys a through m are active by default. Active Keyset 1-10 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 27: Control Knobs
Slot 1 Slot 3 (Map) Additional icons located to Slot 2 the right of the bar indicate available knob functions for the associated page (e.g., zoom, numeric entry). 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 1-11...
Page 28: Screen Captures
With knob depressed, push and release the Home/Power key. A camera icon momentarily shows in the annunciator bar indicating a successful screen capture. To view saved images, remove the SD card and open the “print” folder on a computer. 1-12 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 29: Color Conventions
Current data and values • Magenta • GPS data Active flight plan legs • Cyan Pilot-selectable references • Gray Missing or expired data • Product unavailable • Blue • Water • Brown • Ground 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 1-13...
Page 30: Compatible Equipment
ADAHRS or ADC with AHRS replacement. GAD 29 adapter Optional LRUs may include GAE 12 altitude encoder compatible equipment from either Garmin or a third party manufacturer. G3X Touch Some LRUs provide features that G500/G600 require registration and/or G500/G600 TXi enablement prior to activation.
Page 31: Adc & Ahrs
• Attitude • GRS 77 Heading • AHRS • Rate of turn Slip/skid • 1.8.2 Altitude Encoder DISPLAY FUNCTION GAE 12 Provides pressure altitude Aircraft static pressure information to the transponder. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 1-15...
Page 32: Connext Services
Precip • moving map and Winds Aloft • weather pages. • METARs/TAFs AIRMETs • SIGMETs • TFRs • • PIREPs 1.8.4 Traffic DISPLAY FUNCTION GDL 88 ADS-B GTX 345 1-16 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 33: Get Started
Alerts Settings ..................2-28 2.19 Unit Selections..................2-29 2.20 Display Brightness Control ..............2-30 2.20.1 Automatic Brightness Control............2-30 2.20.2 Manual Brightness Control ............2-30 2.21 Scheduled Messages ................2-31 2.21.1 Message Types ................2-31 2.21.2 Modifying Scheduled Messages ............2-31 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 34 2.24 GPS Status Page ..................2-35 2.24.1 Circle of Uncertainty..............2-37 2.24.2 SBAS Providers ................2-38 2.24.3 GPS Status Annunciations.............2-38 2.24.4 GPS Alerts ..................2-39 2.25 ADS-B Status Page................2-40 LOGS 2.26 Exporting to SD Card ................2-41 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 35: Databases
There are two methods for loading and updating databases: 1. Load databases via SD card. The card may be removed after loading. 2. Transfer databases from a Flight Stream 510 wireless datacard. Requires Garmin Pilot application on a portable electronic device.
Page 36: Database Effective Cycles
Notifications for databases not present or available also display in the form of system messages. Tapping Database Info opens the Active Database Information page. Review this list to determine the status of the indicated database. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 37: Active And Standby Databases
Information about databases that are not yet effective • The Standby DB Info page notifies when no standby databases are available. VIEW COPYRIGHTS Tapping this key displays copyright information for all installed databases. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 38: Manual Updates
To open, tap the Databases key on the start-up page. DATABASE SOURCE INDICATION Connext Icon A Connext icon indicates when a database is from Garmin Pilot via wireless transfer. No indication means the database is either from an SD card or the unit’s internal standby queue.
Page 39 Tapping Show All displays a complete list of all databases. This list may include databases that are: Not yet effective • Older than the currently • active database(s) Error Older Icon Timestamp Unable to update due to • an error 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 40 This key appears when two databases are of the same type and cycle, but pertain to different regions. To specify a database region, tap Select Region, then select the appropriate menu option. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 41: Automatic Updates
SD card to the internal standby queue. BASEMAP AND TERRAIN UPDATES These databases automatically transfer from an SD card without any prompting or progress indications. They do not require pilot confirmation or a unit restart. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 42: Database Concierge
Garmin Pilot app on a mobile device Database Concierge allows wireless transfer of databases from a mobile device. A pilot selects and downloads databases inside the Garmin Pilot app. Transfers occur once Flight Stream 510 establishes a wireless connection inside the aircraft.
Page 43 The unit activates any databases that completed transfer before the interruption. Previously selected databases on an SD card or in the internal standby update as well. The message “Transfers interrupted” displays if no databases are available. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-11...
Page 44: Connectivity
Connext works via the Bluetooth data link to provide up-to-date, wireless information throughout the cockpit. The Connext interface allows communication with applications (i.e., Garmin Pilot and ForeFlight Mobile) while running on a portable electronic device. Connext Features The following features are available on your portable electronic device.
Page 45: Bluetooth Setup
Connext page. AHRS • Magnetic heading • • Flight plan transfer GNX 375, or GPS 175 with external ADS-B In source. 2.7.1 Enabling Bluetooth Tapping Bluetooth Enabled toggles Bluetooth functionality on or off. All associated setting controls and features are unavailable when this function is inactive.
Page 46: Managing Paired Devices
This feature allows automatic import of flight plans via Bluetooth. It may be necessary to turn this function off if a portable device application makes repeated erroneous attempts to send flight plans to the unit. 2-14 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 47: Wi-Fi Setup
Flight Stream 510 requires power up. Wi-Fi is active, but the unit is waiting to connect with a connected device. Connection complete. Flight Stream 510 requires Garmin Pilot to be opened in order for database transfer to commence. Garmin Pilot opened and streaming to unit.
Page 48: Xpdr
FEATURE LIMITATIONS GNX 375 only. • Transponder controls are accessible via the IDENT key. XPDR Control Panel Squawk Code Entry Field Squawk Code Entry Keys VFR Key Data Field XPDR Mode Key 2-16 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 49: Xpdr Setup
Displays the current pressure Unless configured, the altitude. Flight ID is not editable. 2.9.2 Enabling Extended Squitter Transmissions Tapping ADS-B Out allows the transmission of ADS-B Out messages and position information. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-17...
Page 50: Assigning A Flight Id
If the flight ID is editable, tap Flight ID and assign a unique identifier. Flight IDs are alphanumeric (upper-case only) and have an eight character limit. The active flight ID displays by default. 2-18 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 51: Xpdr Modes
During Altitude Reporting mode, all aircraft air/ground state transmissions are handled via the transponder and require no pilot action. Always use this mode while in the air and on the ground, unless otherwise requested by ATC. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-19...
Page 52: Squawk Code Keys
Active Transponder Tapping this key activates the Transponder Mode (On) IDENT function for 18 seconds. This signal distinguishes the transponder from others on the air traffic controller’s screen. Active Squawk Code 2-20 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 53 (active) SYMBOL MEANING Reply active Identify function active Transponder in operation Altitude Reporting Standby Press to initiate the IDENT function (code unmodified) Press to accept modified code and initiate IDENT function 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-21...
Page 54: Remote Control
If a failure occurs while the control page is active, the display automatically returns to the previous page. UNIT CONDITION GPS 175 GDL 88 failure. GNX 375 ADS-B interboard communication failure. For information regarding pilot response to a transponder failure, consult the AFMS. 2-22 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 55: Pilot Settings
ANY phase of flight. For example, if 1.0 NM is selected, the unit uses this for en route and terminal phases and ramps down further during an approach. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-23...
Page 56: Horizontal Alarm Limits
Lateral Deviation Indicator Visual Approach Guidance Lateral deviation indications Advisory horizontal and vertical display when there is an active guidance annunciations appear flight plan. when a visual approach procedure is active. 2-24 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 57: Airport Runway Criteria
2.15.2 Minimum Runway Length Specify a minimum runway length to prevent the display of airports with shorter runways. Typing “0” allows runways of any length to display. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-25...
Page 58: Clocks & Timers
System Setup page. Format options include 12 hour, 24 hour, and UTC. If a 12 hour or 24 hour clock is selected: Tap Local Offset > Specify the appropriate offset value from UTC. 2-26 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 59: Page Shortcuts
Terrain • Verify shortcut operation once Flight Plan • complete. Weather • Tapping Restore Defaults returns both slots to their default settings (Terrain for Slot 2, Nearest Airport for Slot 3). 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-27...
Page 60: Alerts Settings
Smart Airspace settings on the Map page. With the exception of Altitude Buffer, airspace alert options are on/off only. Airspace alerts for Prohibited airspace cannot be disabled. 2-28 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 61: Unit Selections
Available only when “User (ºU)” is the active Variation NAV angle SPECIFY UNIT TYPE 1. Review the current unit selections. 2. Tap the applicable parameter key. 3. Select a unit type. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-29...
Page 62: Display Brightness Control
Installer configured curves determine the amount of change in brightness that occurs in response to a control adjustment. If brightness control is not satisfactory, contact a Garmin dealer to adjust the lighting curves. 2-30 GPS 175/GNX 375 Pilot’s Guide...
Page 63: Scheduled Messages
This function is accessible from either the Scheduled Messages page or the system message list. RESET TIMER Restarts the countdown timer. DELETE MESSAGE Confirming this request removes the selected message from the list. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-31...
Page 64: Status Indications
System advisories display on a dedicated page or slide over window. Depending on the number of advisories, this list may be scrollable. Function or mode specific advisories appear as unobstructed annunciations on the associated display. System Messages Page Mode Advisory Annunciation 2-32 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 65: Alert Annunciations
ANNUNCIATION LOCATION Alerts and informational advisories annunciate in the annunciator bar along the bottom of the screen. Alerts, Inhibits Flight Phase Procedure Waypoint and and Test Mode Power Off Advisories Advisories 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-33...
Page 66: Pop-Up Alerts
To acknowledge the alert and return to previous page view, tap Close. 2.22.3 Aural Alerts FEATURE LIMITATIONS • GNX 375 only (traffic alerts) Traffic alerts are accompanied by an aural voice message. Voice gender is configured during installation. 2-34 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 67: System Status Page
Outer circle represents the horizon • (with north at the top of the circle) Inner circle represents 45° above the horizon • Center point shows the position directly overhead • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-35...
Page 68 Data collected, but receiver is not using satellite in the Cyan bar, solid position solution. Data collected, satellite in use in the current position Green bar, solid solution. Differential corrections are in use (e.g., WAAS). D (inside bar) 2-36 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 69: Circle Of Uncertainty
NOTE Under FAR parts 91, 121, 125, and 135, FDE must be used prior to all oceanic or remote area flights using the GPS 175/GNX 375 as a primary means of navigation. This program uses an algorithm to predict FDE availability. If the unit has not been in operation for more than six months, acquiring satellite data to establish almanac and satellite orbit information may take 5 to 10 minutes.
Page 70: Sbas Providers
3-D navigation mode. GPS receiver computes altitude 3D Nav using satellite data. 3-D navigation mode. Differential corrections from SBAS 3D Diff Nav provider are in use. Satellite coverage is insufficient to pass built-in integrity monitoring tests. 2-38 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 71: Gps Alerts
On-board hardware failure. Yellow “No GPS Position” Unit cannot determine a GPS annunciation. Loss of Position position solution. Ownship icon not present 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-39...
Page 72: Ads-B Status Page
Get Started 2.25 ADS-B Status Page View last uplink time and GPS source information. FEATURE REQUIREMENTS GDL 88 or GTX 345 ADS-B transceiver (GPS 175 only) • UPLINK TIME Dashes indicate when valid uplink data is TEXT MINUTES SINCE unavailable (e.g., the device is offline).
Page 73: Logs
Provides WAAS engine data in the form of serial text messages • Overwrites oldest file when the internal log reaches capacity • Exports to the “log_files” folder on the SD card • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 2-41...
Page 74 INTENTIONALLY LEFT BLANK 2-42 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 75: Navigation
Create User Waypoints ................3-45 3.14.1 Define Waypoint Criteria ..............3-46 3.14.2 Edit an Existing User Waypoint .............3-48 3.14.3 Import User Waypoints ..............3-48 3.15 Nearest....................3-49 PROCEDURES 3.16 Basic Operations ..................3-52 3.16.1 GPS Flight Phase Annunciations............3-52 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 76 Navigation NAVIGATION APPS & FUNCTIONS Menu selections vary based on features and optional equipment installed with Garmin avionics. NEXRAD and Terrain overlays are mutually exclusive. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 77: Map
Customizable data field appearing in each corner of the map. By default, these display: distance, track, ground speed, and desired track NAV Range Ring Displays current direction of travel on a rotating compass. Orientation: Magnetic north 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 78 10.0 nm FEATURE LABELS To maintain readability, map feature labels remain uniform at all zoom levels. TRAFFIC UNITS System Units page selections do not affect the display of traffic on the Map page. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 79 FEATURE Traffic Surface Conditions Ownship Airspace Flight Plan Waypoints Terrain-FLTA Airways Point Obstacles Reference Grid Line Obstacles Radar Coverage NEXRAD METAR SafeTaxi Winds Aloft Runways SIGMET Terrain AIRMET Basemap PIREP Topo AIREP 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 80: Map Interactions
Tapping any object or location on the map displays a map pointer and an information banner. MAP POINTER This symbol indicates point of contact on the map. A gray circle highlights any selected waypoint or obstacle. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 81 To move the selector through each object in proximity of the map pointer, select an object and tap Next. Overlapping objects may be difficult to identify at a given zoom level. Stack Active Selection 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 82: Graphical Flight Plan Editing
Graphical editing allows quick changes to the active flight plan from the map display. Map provides identifier keys for selecting waypoints that are stacked or in close proximity. If the displayed options are not preferred, tap away or select Cancel. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 83 You can edit, add, or omit flight plan legs by tapping or dragging your finger directly on the map. Existing Selected Waypoint 1. Tap any location on the map. 2. Tap Graphical Edit. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 84 Delete any existing flight plan before attempting to graphically edit a direct-to waypoint. Map does not allow the addition of an intermediate waypoint between the current position and a direct-to waypoint unless the waypoint is in the flight plan. 3-10 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 85 Map page. 1. Tap any location on the map > Graphical Edit. 2. Begin tapping waypoints to add them to the temporary flight plan. 3. Tap Done. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 86: Map Setup
Specify airway types and range values • • Expand the forward-looking view for improved situational awareness RESTORE MAP SETTINGS With the exception of user fields, this key restores all original factory map settings. 3-12 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 87: Configure User Fields
Tap any key and select from the list of available data types. Displayed units change based on selection. Selecting “OFF” removes the corresponding user field from the map page. User Field Absent Tapping Restore User Fields returns all fields to their default settings. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 88: Map Orientation
Label below the North indicator shows the current orientation. This label is absent when the info banner is active. North Up is useful when zoomed out to view the entire route or a frontal system on a NEXRAD display. 3-14 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 89: North Up Above
Visual Approach To reduce page clutter, the key moves to the upper left corner of the display when the info banner is active. 3.2.5 TOPO Scale Displays a topographical elevation scale. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 90: Range Ring
3.2.8 Ahead View FEATURE LIMITATIONS • Not available when page orientation is North Up Repositions ownship near the bottom of the page to expand the view ahead. 3-16 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 91: Map Detail
Small Cities Medium Cities Large Cities Freeways Highways Roads Railroads Basemap Labels VORs NDBs Line Obstacles Point Obstacles Airspaces that are not prohibited or restricted Waypoints SafeTaxi Restricted Airspaces Prohibited Airspaces Present Removed 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 92 Runway extension [1]Symbol depicts orientation of longest runway. LAND DATA SYMBOLS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Railroad National Highway River/Lake Freeway State/Province Border Small City Local Road Medium City Local Highway Large City 3-18 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 93: Map Overlays
Depictions are similar to a VFR • sectional Pilot-selectable topographical • elevation scale available TERRAIN Overlays terrain map data • Color shading depicts terrain • elevation relative to the aircraft’s altitude 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 94 Navigation TRAFFIC Overlays traffic information • Filter selection on the Traffic • page determines altitude range Feature optional for GPS 175 • NEXRAD Overlays datalink precipitation • weather information Options include: CONUS, • Regional, or off (none) Feature optional for GPS 175 •...
Page 95 High altitude airways are green, • low altitude airways are gray OBSTACLES & WIRES Overlays obstacle and wire data • • Color shading depicts an object’s elevation relative to the aircraft’s altitude 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 96: Overlay Status Icons
The absence of an overlay icon means one of two possible conditions: 1. Overlay not present at the current detail level or zoom setting. 2. Overlay control is off. METAR NEXRAD Obstacle Power Line Traffic Terrain Data not available 3-22 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 97: Smart Airspace
[1]Vertical distance above and below aircraft altitude. AIRSPACE DATA SYMBOLS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Class B Altitude Class C/TCA Label (ceiling/floor) Class C Altitude Class D Label (ceiling/floor) Class D Altitude Restricted/Prohibited Label (ceiling only) Class B/TMA Other/ADIZ 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 98: Safetaxi
Feature labels denote: Runways • • Taxiways Airport landmarks • SAFETAXI DATA SYMBOLS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Runway Taxiway Helipad Construction Area Airport Beacon Unpaved Parking 3-24 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 99 Complex ramp areas • Directional limitations • • Limited wing-tip clearance Overflight risk • CONSTRUCTION SPOTS There are no expanded detail keys or notes associated with construction areas. Construction Area Border 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 100: Active Flight Plan
Displays up to 100 waypoints for an active flight plan • Active Flight Plan Page Waypoint Identifier Column Selectable Data Field Columns Active Leg Indicator Fix Type Indicator Current Waypoint Leg Data Waypoint Type Icon Add Waypoint Key 3-26 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 101 Missed Approach Hold Point Parallel Track (no fix) ACTIVE LEG STATUS INDICATIONS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Arc Left Holding Pattern (Right Turns) Holding Pattern (Left Turns) MAHP Right Arrow Parallel Track Direct To Arc Right 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 102: Edit Data Fields
Expanded Airway Detail To hide all waypoints along an airway, but Airway Collapsed Indication not the airway’s exit waypoint, tap Exit Waypoint Collapse All Airways. 3-28 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 103: Parallel Track
1. Tap Menu > Parallel Track. 2. Specify the track direction and offset distance relative to the active flight plan. 3. Tap Activate. “-P” indicates when the active leg is on a parallel track. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 104: Flight Plan Catalog
Use the Edit Route option to make the desired changes. Deletes the selected flight plan. DELETE Select the flight plan > Delete > OK. 3-30 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 105: Delete A Flight Plan
2. Tap Delete. 3. Confirm the request to delete all waypoints. To delete all flight plans from the catalog: 1. Select a flight plan. 2. Tap Delete All. 3. Confirm the request. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 106: Creating A Flight Plan
2. At the end of the flight plan list in the Catalog, tap Create New Catalog Route. 3. Tap Add Waypoint > select a waypoint identifier 4. Tap Menu > Direct-To (or Preview > Activate). 3-32 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 107: Waypoint Options
• patterns from a dedicated menu page Open the dedicated information page for the • WPT Info selected waypoint Remove the selected waypoint or hold from the • Remove active flight plan 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 108: Active Flight Plan Map Overlay
LEG STATUS COLOR overlay on the Map page and are display Active Magenta only. Next & Future White Past or Inactive Gray Previous Leg(s) Active Leg Next Leg(s) Leg Status Indications 3-34 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 109: Gps Nav Status Indicator Key
Active Route Display CDI Scale Active Label changes to show active Only from-to waypoints display route identifiers (from-to-next) when the CDI scale is active. and leg types. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 110: Direct To
HOLD ACTIVATE hold pattern until it is removed Removes a hold on a waypoint REMOVE Enters a value using the keypad ENTER Loads the approach course into the GPS/GNX unit LOAD APPROACH 3-36 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 111 VOR, NDB or any other location. Tapping the map page anywhere without an existing LOCATION location name creates a waypoint with the name MAPWPT. On the Map page, tap a location > Direct-To > Activate. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 112 Automatic waypoint sequencing suspends during the hold. 1. Tap Direct-To > Hold > modify the course options. 2. Then tap Load Hold > Hold Activate. 3-38 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 113: Waypoints
FIS-B (viewing NOTAMs) • • Navigation database containing VRP waypoint data FEATURE LIMITATIONS 2-D maps provide zoom functionality only • • FIS-B transmits distant and FDC NOTAMs within 100 nm of radio station position 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 114 (e.g., “NW USA”) depictions) • Identifier and type icon As you approach an airport, use the Preview function to orient yourself for such things as pattern entry or runway alignment. 3-40 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 115 Station declination • • VOR class Data Fields: Nearest VRP (identifier, type icon, bearing, and distance) Data Fields: Frequency • Nearest airport (identifier, type icon, bearing, and distance) • • Marker description 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 116: Waypoint Selection
Matching waypoint entries typically change with the addition of each typed character. An information key reflects each matching entry. WP Info Key “No matches found” and “Duplicate found” annunciate when applicable. 3-42 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 117: Search Tabs
To list all classes, select All. FLIGHT PLAN Lists all waypoints contained in the active flight plan. USER Lists up to 1,000 user-defined waypoints. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 118 Tap Search Facility Name to begin search. SEARCH BY CITY Lists all airports, NDBs, and VORs found in proximity of the city. Tap Search City Name to begin search. 3-44 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 119: Create User Waypoints
NAV radio to tune each VOR and specify the radials to fly inbound and outbound. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 120: Define Waypoint Criteria
Assign the waypoint a temporary status. Identifier remains Temporary available until the next unit power cycle. Add the new identifier to the used waypoints list. The Create associated information page opens automatically for viewing and editing purposes. 3-46 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 121 Set the Waypoint Position using one of the following options. Radial/Radial: Specify a waypoint and radial for each of the two reference points. Radial/Distance: Specify the reference waypoint, radial, and distance. LAT/LON: Specify the point’s latitude and longitude. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 122: Edit An Existing User Waypoint
The Import Waypoints key appears when the unit detects a user waypoint on the datacard. 1. Insert datacard containing user waypoints. 2. From the Home page, tap Waypoint Info > Import Waypoints. 3. Acknowledge the pop-up message. 3-48 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 123: Nearest
• Identifier • symbol • distance • bearing Nearest NDB • Identifier • symbol • distance • bearing • frequency Nearest User Waypoint • Identifier • symbol • distance • bearing Nearest Airspace • Identifier • symbol • distance 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 124 MULTIPLE FREQUENCIES This key displays when more than one frequency is available at the indicated range. Applicable to functions displaying information only (ARTCC, FSS, and WX FREQ). 3-50 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 125: Procedures
The flight plan allows only one procedure to be loaded at a time. Adding a • new procedure overwrites any existing procedure LOAD A PROCEDURE Select the procedure type (departure, arrival, or approach) and then define the criteria for that procedure on the corresponding page. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 126: Basic Operations
Under normal conditions, these annunciations are green. They turn yellow when cautionary conditions exist. ANNUNCIATION FLIGHT PHASE 0.30 NM 0.3 nm CDI scale 1.00 NM 1.0 nm CDI scale 3-52 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 127 Localizer Performance Approach Localizer Performance Approach with advisory vertical LP +V guidance provided. LP +V uses published LP minimums. Localizer Performance with Vertical guidance approach. MAPR Missed Approach Oceanic TERM Terminal VISUAL Visual Approach 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 128 ID for the current destination. The channel ID for the SBAS approach is available from an approved approach chart. If there are duplicate numbers for a channel, a list is available to select the precise approach. 3-54 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 129 If the unit is not configured for a CDI key, then the Activate GPS Missed Approach feature only resumes automatic waypoint sequencing. Switch to GPS navigation by using the external source selection method (typically an EFIS system). 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 130 To lose extra altitude or speed by going around the holding pattern again, before crossing the holding waypoint the second time, tap SUSP to manually suspend waypoint sequencing. If already passed the waypoint, re-activate the holding pattern. 3-56 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 131 Vectors-to-Final, VTF appears as part of the active leg on the Map page. The flight plan and the final approach course includes all destination waypoints along the final approach course, including locations before the FAF. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 132 15 nm from the FAF. The illustration shows multiple locations along the approach path and the CDI selection (GPS or VLOC) to expect. In the shaded area, the automatic switch occurs from GPS to VLOC. 3-58 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 133 LNAV +V as shown above. Published LP minimums. The LPV approach has localizer performance and advisory LPV APPROACH vertical guidance. Flying the LPV approach is similar to the standard ILS approach. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 134 10.As the GPS/GNX crosses the MAP and sequencing suspends, prepare the aircraft for a missed approach operation. Tap Unsuspend to sequence to the missed approach procedure. 11.Using the GPS/GNX guidance, fly to the MAHP and hold. 3-60 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 135 The LP+V approach has advisory vertical guidance and at each step down the pilot must descend to the correct altitude. The approach results in an MDA and missed approach point. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 136 Unsuspend to sequence to the missed approach procedure. For missed approaches with heading legs, fly manually until the first active course leg is reached. 11.Using the guidance provided by the unit, fly to the MAHP and hold. 3-62 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 137 If obstructions are within 3 nm to the runway, along the approach path, advisory vertical guidance is not provided. Only external CDI/VDI displays provide vertical deviation indications. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 138 TO/FROM flag on the CDI indicates FROM and the Distance field on the flight plan increases as you navigate the leg. FROM legs are typically found on procedure turns and on some missed approach procedures. 3-64 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 139 King KAP140/KFC225 autopilot units. After enabling the autopilot outputs, the GPS provides guidance information consistent with what the autopilot expects (i.e., angular CDI scaling and glideslope capture for an LPV or other vertically guided GPS approach). 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 140 INTENTIONALLY LEFT BLANK 3-66 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 141: Planning
Computing Fuel Statistics ...............4-7 DALT/TAS/WIND CALCULATOR DALT/TAS/Wind Page ................4-8 4.4.1 Editing Input Data ................4-8 4.4.2 Computing DALT/TAS/Wind Statistics ...........4-10 RAIM PREDICTION RAIM Prediction Page ................4-11 4.5.1 Calculating RAIM Status ...............4-12 4.5.2 RAIM Status Indications ..............4-12 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 142 Point-to-Point mode only. Flight Plan mode only. From key not selectable when Present Position (P.POS) function is active. Function not selectable when sensor data in use. Indicates pressure altitude when sensor data in use. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 143: Vertical Calculator
Create a 3-D profile to guide you from your present position and altitude to a final (target) altitude at a specified location. Once defined, you may configure message alerts and additional data on the Map page to stay informed of your progress. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 144: Vcalc Setup
Displaying VCALC related advisory • messages RESTORE DEFAULTS Resets VCALC page settings to their default values. Excludes Target Waypoint. DISPLAY MESSAGES Allows VCALC related advisory messages to display on the Messages page. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 145: Fuel Planning
Use the mode specific controls to define the flight path (leg or route). Required input values are dependent upon mode selection. Fuel on board, fuel flow, and ground speed data are required independent of mode selection. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 146 Specify ground speed • Ground Speed This function is display only when sensor data • is in use Adjust fuel on board and fuel flow values as necessary to account for changes in performance. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 147: Computing Fuel Statistics
From waypoint. 3. Specify the amount of fuel on board and average fuel flow rate. 4. Specify ground speed or elect to use sensor data. 5. Tap Compute. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 148: Dalt/Tas/Wind Calculator
DALT/TAS/Wind Page This feature indicates the theoretical altitude at which the aircraft performs based on several input variables. 4.4.1 Editing Input Data Available selections are dependent on sensor data use. Not Selectable GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 149 Excludes TAT and HDG • Ground Speed • Specify ground speed [2] Toggles to Pressure ALT indication when sensor data in use. Not selectable when sensor data in use. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 150: Computing Dalt/Tas/Wind Statistics
Wind data calculations are dependent on true airspeed, aircraft heading, and ground speed. Wind direction is dependent on the NAV Angle system unit setting. If wind speed is zero, wind direction displays as dashes. 4-10 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 151: Raim Prediction
RAIM is not available Near 100% availability in Oceanic, En route, and Terminal phases of flight • WP Identifier, Arrival Date, and Arrival Time setup keys • Compute RAIM key • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 4-11...
Page 152: Calculating Raim Status
Dashes indicate when the destination waypoint is invalid. ANNUNCIATION DESCRIPTION Computing Status is pending. RAIM Available RAIM is available at the specified waypoint. RAIM Unavailable RAIM is not available at the specified waypoint. 4-12 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 153: Hazard Awareness
5.17.1 Terrain Elevation Depictions............5-34 5.17.2 Obstacle Elevation Depictions ............5-35 5.18 Terrain Alerting ...................5-37 5.18.1 Alert Types ...................5-37 5.18.2 Alerting Thresholds...............5-38 5.18.3 Inhibiting PDA & Terrain-FLTA Alerts..........5-39 5.18.4 PDA & Terrain-FLTA Alerts ............5-40 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 154 Hazard Awareness AWARENESS APPS AND FUNCTIONS Menu selections vary based on features and optional equipment installed with Garmin avionics. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 155: Weather Awareness
3,000 feet AGL and is available when flying near approximately 235 major U.S. airports. Surface coverage allows FIS-B ground reception at approximately 36 major U.S. airports. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 156: Per Faa Tso-C157B
NOTAMs received via FIS-B may not be a complete listing. Active NOTAMs are removed from the FIS-B data stream 30 days after issuance. Before flight, review all necessary aeronautical and meteorological information from official sources. For more information, consult AC 00-63. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 157: Weather Display
FIS-B weather data displays as overlays on the dedicated weather page and Map page. No pilot action is required to receive FIS-B weather information. FEATURE REQUIREMENTS FIS-B • GPS 175 with UAT receiver (GDL 88, GTX 345) or • • GNX 375 FIS-B WX Page Aircraft Symbol Depicts current aircraft position and orientation.
Page 158 • • Bearing and distance to map pointer from aircraft’s current position • Cloud Top altitudes Pan location • Report data • Tapping an airport icon displays information about local weather conditions. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 159: Weather Setup
ADS-B Status page, where controls for enabling all weather products, viewing raw text reports, and checking ground reception status reside. To enable all weather products, tap FIS-B WX Status > FIS-B Enabled. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 160: Weather Products
Hazard Awareness Weather Products WEATHER DISPLAY FIS-B WEATHER FIS-B WAYPT PRODUCT POP-UP WX PAGE PAGE INFO TEXT AIRMET METAR w/Decoding NEXRAD NOTAMS PIREP AIRMET SIGMET Temps Aloft Winds Aloft Graphic Product Present GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 161: Product Age
FIS-B transmission intervals report the frequency at which weather products are broadcast by the ADS-B ground stations network. Contact the appropriate weather product supplier for current broadcast rates and refresh intervals. Graphically dense weather products may take several minutes to receive completely. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 162: Legends
Legends A scrollable legend provides relevant product colors and symbols. Definitions are organized by product function. Tap Menu > Legend, and use the inner knob to view the available product legends. 5-10 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 163: Fis-B Nexrad
Play and stop controls are active when three or more NEXRAD images are available for playback. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-11...
Page 164 Each weather pixel varies with latitude. Above 60º latitude, • pixel block width doubles to 3 min/nm for regional maps • Both CONUS and Regional NEXRAD images display simultaneously Combined White hash mark indicates regional boundary • 5-12 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 165: Metars And Tafs
Ceiling 1000 to 3000 ft. AGL and/or visibility three to five miles. IFR: Ceiling 500 to 1000 ft. AGL and/or visibility one to three miles. Low IFR: Ceiling below 500 ft. AGL and/or visibility less than one mile. Unknown 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-13...
Page 166: Airmets
Widespread mountain obscuration due to clouds, MTN OBSR precipitation, smoke, haze, mist, or fog Sustained surface winds >30 kt and/or potential • Surface Winds non-convective wind sheer below 2,000 ft AGL 5-14 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 167: Sigmets
PIREPs are issued as either Routine (UA) or Urgent (UUA). Routine display with a blue map icon and urgent display with an amber icon. Selecting either icon displays a report window. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-15...
Page 168: Winds Aloft
TFRs are routinely issued for occurrences such as dignitary visits, military activities, and forest fires. Tapping the TFR graphic on the weather page brings up textual details for the selected TFR. 5-16 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 169: Raw Text Reports
For the received ground station, the station range field indicates complete/incomplete status only for those products within the ground station’s range. To view the FIS-B Reception page, tap Menu > Radio Stations. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-17...
Page 170: Traffic Awareness
Hazard Awareness Traffic Awareness FEATURE REQUIREMENTS External ADS-B In product (GPS 175) • FEATURE LIMITATIONS Available functions and alerting features are dependent upon the ADS-B • traffic system source ADS-B FEATURES Runway and taxiway depiction during SURF mode • (< 2 nm range scale) •...
Page 171: Traffic Display
• Altitude Separation Value Indicates when an intruder is above or below the ownship. Value appears above the traffic symbol • Plus or minus sign denotes higher or lower altitude • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-19...
Page 172 • Depiction is of the most immediate threat TRAFFIC UNITS Traffic units are always uniform. PARAMETER UNITS Selections on the System Units page do Altitude not affect the traffic display. Distance 5-20 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 173 Selected Selected Directional Non-directional Alerted (On-Ground) Non-directional Off-scale Non-directional (On-Ground) Alerted Traffic Proximate Directional Directional Alerted Traffic (On-Ground) Proximate Off-scale Directional Non-directional Alerted Traffic (On-Ground) Directional Surface Non-directional Surface Vehicle Vehicle 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-21...
Page 174: Traffic Interactions
Vehicle type • • Closure rate Track • Ground speed • Tapping Next repeatedly steps through multiple symbols spaced closely together. Selected Traffic Selected Traffic Info Next Key 5-22 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 175: Traffic Setup
A longer duration results in a longer vector. Select filter range. Altitude Filter Options: • Normal • Above • Below • Unrestricted Display targets in close proximity as a group. Asterisk Traffic Grouping depicts the highest priority target. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-23...
Page 176: Traffic Test
Relative • Endpoint depicts intruder’s location relative to the ownship at the end of the selected duration Airborne functionality only • “Relative Motion - Unavailable” annunciates during • ground operations 5-24 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 177: Altitude Filtering
Relative Motion - XX Active motion vector type is relative. SEC/MIN Relative Motion - Aircraft is not airborne and the active motion vector UNAVAILABLE type is relative. Unavailable Necessary traffic data not available. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-25...
Page 178: Traffic Alerting
Closure rate of each aircraft • altitude above ground level. In fixed (ownship and target) winged aircraft, no aural alerts are given below 500 ft. 5-26 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 179: Terrain Awareness
Create a 2-D image of surrounding terrain and obstacles relative to the • aircraft’s position and altitude Calculate the aircraft’s flight path in relation to surrounding terrain and • obstacles Predict hazardous terrain conditions and issue alerts • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-27...
Page 180 MSL Not subject to pressure and Subject to local atmospheric • • temperature variations conditions • Affected primarily by satellite • Affected by variations in pressure, geometry temperature, and lapse rate 5-28 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 181: Database Limitations
Terrain and obstacle data are not available when the aircraft is operating outside of the installed database coverage area. Garmin obtains terrain and obstacle data from government sources and cannot independently verify the accuracy and completeness of the information. Pilots must familiarize themselves with the appropriate charts and other data for safe flight.
Page 182: Terrain Display
Changes to Track Up (TRK UP) in the event of a heading failure • Legend Shows color designations for terrain and obstacle relative altitude ranges. Terrain Overlay Icon Indicates power line or obstacle presence at the current zoom scale. 5-30 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 183 AUTOMATIC DATA REMOVAL Automatic removal of obstacle and power line data occurs at range scales greater than 10 nm. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-31...
Page 184: Terrain Setup
Arc changes view format to a forward-looking 120º arc • • Toggles the active flight plan overlay on or off Flight Plan (Terrain page only) Legend Toggles the Terrain and Obstacle/Wire legend on or off • 5-32 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 185: Terrain Proximity
Declutter automatically removes obstacle and power line data at large ranges • • Continuous monitoring of database validity, GPS and hardware status Displays when higher level terrain functions are active • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-33...
Page 186: Terrain Elevation Depictions
Hazard Awareness 5.17.1 Terrain Elevation Depictions Color shading depicts terrain elevations relative to the aircraft’s position and altitude. Colors automatically adjust as the aircraft’s altitude changes. Terrain Shading Yellow Black 5-34 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 187: Obstacle Elevation Depictions
Red obstacle is above or within 100 ft below current altitude. Yellow obstacle is between 100 ft and 1,000 ft below current altitude. White obstacle is more than 1,000 ft below current altitude. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-35...
Page 188 Asterisk indicates that the obstacle belongs to a group • Relative altitude of the highest obstacle determines color • • Depiction is of the most immediate threat 5-36 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 189: Terrain Alerting
Alerting inhibited within 0.5 nm of approach runway or <125 ft AGL within 1.0 nm of runway threshold. Alerting thresholds for final descent are based on current position, speed, and flight path data. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-37...
Page 190: Alerting Thresholds
En Route 700 ft 500 ft Terminal 350 ft 300 ft Approach 150 ft 100 ft Departure 100 ft 100 ft PDA THRESHOLD Runway Threshold Distance from Destination Airport (nm) Alerting Area 5-38 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 191: Inhibiting Pda & Terrain-Flta Alerts
Altitude <200 ft above runway elevation • INHIBIT Position <0.5 nm of approach end or between each • runway end Tapping Terrain Inhibit generates a pop-up. Confirm the request to inhibit terrain alerts. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-39...
Page 192: Pda & Terrain-Flta Alerts
• Aircraft is outside of the terrain database • regional coverage Alert Type: Caution Pop-up Alert: Yes TERRAIN Condition: Reduced Required Terrain Clearance • • Imminent Terrain Impact Premature Descent • 5-40 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 193 Reduced Obstacle Clearance • • Imminent Obstacle Impact Reduced Line Clearance • Imminent Line Impact • Alert Type: Caution Pop-up Alert: Yes WIRE Condition: • Reduced Line Clearance Imminent Line Impact • 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-41...
Page 194 INTENTIONALLY LEFT BLANK 5-42 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 195: Messages
Message Key ..................6-2 Airspace Advisories ................6-3 Database Advisories................6-4 Flight Plan Advisories ................6-5 GPS/WAAS Advisories................6-6 Navigation Advisories................6-8 System Hardware Advisories ..............6-9 Terrain Advisories ................6-11 Traffic System Advisories..............6-12 6.10 VCALC Advisories ................6-13 6.11 Waypoint Advisories ................6-13 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 196: Advisory Messages
Tapping it again acknowledges all active advisories and closes the list. Flashes when a new advisory is present • Turns solid once all active advisories are acknowledged • • No longer displays after all active advisories are cleared GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 197: Airspace Advisories
10 minutes than 10 minutes. AIRSPACE ALERT - Within Airspace is less than 4 nm from the aircraft. May not be projected to enter the airspace. 4 nm of airspace 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 198: Database Advisories
Verify that the geographical large mag var. Typically occurs when region supports navigation Verify all course operating at high based on magnetic variation. angles. latitudes that do not support a magnetic NAV angle. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 199: Flight Plan Advisories
Slowing the aircraft may may overshoot in excess of normal. If shallow the turn. course during turn. coupled, the autopilot may not be able to execute the steep turn. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 200: Gps/Waas Advisories
HPL/VPL for LNAV). Approach downgraded GPS approach from LPV or LNAV/VNAV Continue to fly the approach downgraded. to an LNAV approach. using published LNAV Use LNAV minima. Vertical guidance no minimums. longer available. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 201 Use a different GPS receiver WAAS board is reporting GPS receiver needs that it requires service. or a non-GPS based source of service. GPS module may navigation. Contact dealer continue to function. for service. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 202: Navigation Advisories
True NAV angle is set to True. No action necessary. north (ºT). NAV angles are referenced to a user NAV angle is set to User. No action necessary. set value (ºU) GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 203: System Hardware Advisories
Pilot stored data • Map menu settings was lost. Recheck Recheck settings. User waypoints • settings. Catalog flight plans • User field settings • • Unit convention selection 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 204 No action necessary. successfully. WAAS or traffic logs. <GPS/GNX> is not Heading source receiving heading inoperative or information from any Contact dealer for service. connection lost. source. Heading up map orientation not available. 6-10 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 205: Terrain Advisories
Terrain Advisories ADVISORY CONDITION CORRECTIVE ACTION Terrain alerts are inhibited. Re-enable Pilot enables terrain alert Open Terrain menu and alerts in the Terrain inhibit function. deselect Terain Inhibit. menu. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 6-11...
Page 206: Traffic System Advisories
Communication with the ADS-B LRU is lost. UAT LRU reports a low UAT fault. battery or fan fault. ADS-B LRU unable to UAT traffic/data receive UAT traffic and receiver fault. FIS-B data. 6-12 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 207: Vcalc Advisories
No action necessary. successful. successfully. User waypoints User waypoint import imported successful. Import successfully - function reuses existing No action necessary. existing waypoints user waypoints instead reused. of creating duplicates. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 6-13...
Page 208 INTENTIONALLY LEFT BLANK 6-14 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 209: Qualification
Table 1 contains the tasks required to qualify a glove. • • Table 2 contains tasks that are not required to qualify a glove, but may limit how some functions are accessed while wearing a glove. 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 210 If all applicable tasks produce the same response with and without a glove, the pilot may use the glove in flight. GLOVE QUALIFICATION PROCEDURE Pilot: Glove Description: Circle the applicable navigator. GPS 175 GNX 375 GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 211 Worse Select BTG. Same Worse Load Airway Same Worse Same Worse ALFOR Same Worse Load Same Worse Scroll the list of flight plan waypoints up and Same Worse down. Back Same Worse 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 212 Observe Same Worse that KONP is removed from the flight plan. Drag the leg between KMMV and BTG to KSPB. Same Worse Observe that KSPB is added to the flight plan. GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 213: Glossary
Automated Service Observing System Air Traffic Control ATIS Automatic Terminal Information Service Along Track AWOS Automated Weather Observing Station Course Deviation Indicator Control and Display Unit Course CTAF Common Traffic Advisory Frequency 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 214 Flight Management System Feet Per Minute Flight Service Station Ground Clutter Suppression Garmin Air Data Computer Garmin Data Link Garmin Display Unit Garmin Flight Controller Glidepath Global Positioning System GPSS Global Positioning System Steering GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 215 International Geomagnetic Reference Field Imminent Line Impact Instrument Landing System Intersection Imminent Obstacle Impact International Standard Atmosphere Imminent Terrain Impact KIAS Knots Indicated Airspeed Lateral Deviation Indicator Letter of Authorization Localizer Line Replaceable Unit 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 216 Omni Bearing Selector Oceanic Pilot Controlled Lighting Premature Descent Alert Pulse Repetition Frequency Position, Velocity, and Time RAIM Receiver Autonomous Integrity Monitoring Reduced Line Clearance Reduced Required Obstacle Clearance Reduced Required Terrain Clearance GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
Page 217 Traffic Alert and Collision Avoidance Devices TCAS Traffic Alert and Collision Avoidance System TERM Terminal Temporary Flight Restriction Traffic Information Service TSAA Traffic Situational Awareness with Alerting Technical Standard Order Universal Time Coordinated 190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide...
Page 218 Vertical Deviation Indicator Visual Flight Rules VLOC VOR/Localizer VNAV Vertical Navigation Very High Frequency Omni-directional Range Vertical Protection Level Visual Reporting Point Vertical Speed WAAS Wide Area Augmentation System Waypoint XPDR Transponder GPS 175/GNX 375 Pilot’s Guide 190-02207-02 Rev. 1...
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Gnx 375

Garmin GPS 175 Pilot's Manual

1 System at a Glance

2 Get Started

3 Navigation

4 Planning

5 Hazard Awareness

6 Messages

7 Qualification

8 Glossary

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Summary of Contents for Garmin GPS 175