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Garmin GDM 4500, Digital DME

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Install Only: The Manufacturer requires that this item is installed by an authorised dealer – please contact us for a comprehensive installation quote.

    • Purpose-Built for Turbine Aircraft and Helicopters – Designed to meet higher qualification levels and withstand demanding environmental conditions.

    • ARINC 429 Compatibility – Enables integration with select third-party avionics systems.

    • Integration with Garmin Systems – Fully compatible with Garmin integrated flight decks and TXi displays.

    • Free Scan Capability – Supports automatic channel scanning for efficient frequency management.

    • DME-DME Navigation – Enables accurate position fixing via Distance Measuring Equipment pairs, supported by a compatible FMS.

    • Future-Proof with Software Updates – Planned updates will enable advanced multi-channel features for GTN Xi Navigators and TXi Flight Displays.

    • HSDB Connection (High-Speed Data Bus) – Eliminates the need for a GAD 43e, simplifying system architecture.

    • Required External Equipment – Needs an L-band DME antenna (sold separately) for full functionality.

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Part NumberDescriptionConditionPriceAvailabilityStockOrder Qty 
010-02621-01Garmin GDM 4500, Digital DMENEW$25,445.00On backorder0
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FLY WITH PRECISION DISTANCE MEASUREMENT

Designed for high-performance turbine aircraft and helicopters, the GDM 4500 remote-mount DME works with select Garmin integrated flight decks and displays to provide slant-range distance calculations relative do DME ground stations.

 

Remote-mount DME Radio

Automatically tunes DME channels, based on selected NAV Radio frequency

Free scan capability searchers for DME stations within range1

Can reference multiple stations for optional DME-DME navigation

Offers an alternative navigation source to satellite-based GPS

Maximizes range with 250 watts of transmit power

 

THE DME SOLUTION FOR TODAY’S FLIGHT DECKS

GDM 4500 DME is a modern digital radio, designed for installation in turbine aircraft and helicopters with an environmentally hardened chassis.

MULTICHANNEL OPERATION

GDM 450R can allow pilots to tune and track up to two separate DME frequencies. With an optional enablement and compatible avionics, the aircraft’s FMS1 can automatically scan and tune up to three additional DME frequencies.

DME HOLD CAPABILITY

For added navigation flexibility, the DME “hold” function lets you maintain your active DME distance indication when tuning the associated NAV radio to a different frequency. This function is particularly useful for instrument approaches where it becomes necessary to tune the localizer or other approach aid while needing to retain your NAV’s referenced DME information.

DME-DME AREA NAVIGATION (RNAV)

With a compatible flight deck or display, the GDM 4500 radio can use the distances from two or more DME ground stations to determine the aircraft’s position. This enables the DME to support RNAV routes, providing an alternative navigation option.

ROBUST INTERFACING WITH ARINC 429

GDM 4500 integrates directly with compatible Garmin displays — no interface adapter is required. Additionally, it supports ARINC 429, RS-232 and King Serial connections. ARINC 429 provides a digital interface for third-party navigation units and displays on the aircraft.

COMPLETING THE SYSTEM

In addition to compatible navigation equipment and flight displays in your aircraft, you’ll need an L-band DME antenna (sold separately) to complete your GDM 4500 system installation. See your Garmin dealer for recommended antenna options and mounting configurations.

 

 

1Requires a compatible Garmin system; feature availability varies by display
Engineering enhancements are ongoing and may not be reflected in the pictures, videos and specifications.
General
Operational temperature range -45° C to +70° C
Maximum operating altitude 55,000 ft

 

 

 

 

Physical
Installed height (including rack) 3.11″ (79.0 mm)
Installed width 3.46″ (87.9 mm)
Installed depth to connector backshell 13.32″ (338.8 mm)
Installed depth to straight connector backshell 12.84″ (326.1 mm)
Weight (unit only) 3.63 lbs (1.65 kg)
Weight (with install rack, connector kit, and configuration module) 4.21 lbs (1.91 kg)

 

 

 

 

 

 

 

 

Power Specifications
14 V Typical/Tx 0.6 A
14 V Maximum/Tx 0.8 A
28 V Typical/Tx 0.3 A
28 V Maximum/Tx 0.4 A

 

 

 

 

 

 

Performance
Minimum sensitivity level -90 dBm
Maximum range (line of sight) 300 nautical miles
DME channels 5 (with compatible avionics)
Nominal Transmit Power 250 watts

 

 

 

 

 

 

Interfaces
ARINC 429, RS-232, HSDB, King Serial, Audio Out

 

 

 

Certifications
TSO-C66c DME/N
ETSO-2C66b DME/N Class 1

 

 

 

 

  • GTR 4500
  • Mounting rack
  • Configuration Module
  • Product Information Manual

For more information, specifications and product details please visit the official Garmin website.

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FLY WITH PRECISION DISTANCE MEASUREMENT

Designed for high-performance turbine aircraft and helicopters, the GDM 4500 remote-mount DME works with select Garmin integrated flight decks and displays to provide slant-range distance calculations relative do DME ground stations.

 

Remote-mount DME Radio

Automatically tunes DME channels, based on selected NAV Radio frequency

Free scan capability searchers for DME stations within range1

Can reference multiple stations for optional DME-DME navigation

Offers an alternative navigation source to satellite-based GPS

Maximizes range with 250 watts of transmit power

 

THE DME SOLUTION FOR TODAY’S FLIGHT DECKS

GDM 4500 DME is a modern digital radio, designed for installation in turbine aircraft and helicopters with an environmentally hardened chassis.

MULTICHANNEL OPERATION

GDM 450R can allow pilots to tune and track up to two separate DME frequencies. With an optional enablement and compatible avionics, the aircraft’s FMS1 can automatically scan and tune up to three additional DME frequencies.

DME HOLD CAPABILITY

For added navigation flexibility, the DME “hold” function lets you maintain your active DME distance indication when tuning the associated NAV radio to a different frequency. This function is particularly useful for instrument approaches where it becomes necessary to tune the localizer or other approach aid while needing to retain your NAV’s referenced DME information.

DME-DME AREA NAVIGATION (RNAV)

With a compatible flight deck or display, the GDM 4500 radio can use the distances from two or more DME ground stations to determine the aircraft’s position. This enables the DME to support RNAV routes, providing an alternative navigation option.

ROBUST INTERFACING WITH ARINC 429

GDM 4500 integrates directly with compatible Garmin displays — no interface adapter is required. Additionally, it supports ARINC 429, RS-232 and King Serial connections. ARINC 429 provides a digital interface for third-party navigation units and displays on the aircraft.

COMPLETING THE SYSTEM

In addition to compatible navigation equipment and flight displays in your aircraft, you’ll need an L-band DME antenna (sold separately) to complete your GDM 4500 system installation. See your Garmin dealer for recommended antenna options and mounting configurations.

 

 

1Requires a compatible Garmin system; feature availability varies by display
Engineering enhancements are ongoing and may not be reflected in the pictures, videos and specifications.