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Garmin GDM 450R, 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.

  • Distance Display Integration – Shows DME distance information on select Garmin integrated flight decks and TXi™ Flight Displays.
  • Dual DME Frequency Tuning – Allows pilots to tune up to two separate DME frequencies via navigation radios for slant-range distance to ground stations.
  • DME Hold Function – Maintains the current DME distance reading even when the NAV radio is tuned to a different frequency.
  • Optional Multi-Channel Enablement – Supports automatic scanning and tuning of up to three additional DME frequencies for advanced RNAV operations when enabled.
  • DME-DME RNAV Capability – Enables area navigation (RNAV) by using distance data from multiple DME stations to calculate aircraft position.
  • Free Scan Capability – Automatically searches for in-range DME stations to enhance navigation options.
  • Legacy System Support – Compatible with legacy distance indicators and navigation radios via legacy databus connections.

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Part NumberDescriptionConditionPriceAvailabilityStockOrder Qty 
010-02620-31Garmin GDM 450R, Digital DMENEW$13,890.00On backorder0
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FLY WITH PRECISION DISTANCE MEASUREMENT

Designed for Part 23 general aviation aircraft, the GDM 450R 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

Optional free scan capability searchers for DME stations within range1

Can reference multiple stations for optional DME-DME navigation1

Offers an alternative navigation source to satellite-based GPS

Maximizes range with 250 watts of transmit power

 

THE DME SOLUTION FOR TODAY’S GA AIRCRAFT

GDM 450R DME is a modern digital radio, designed for installation in general aviation aircraft. It’s a remote-mount unit that follows the tuning of associated NAV radio(s).

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 450R 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.

EASY INTERFACING

For seamless installation, GDM 450R integrates directly with compatible Garmin displays — no interface adapter is required. It also supports RS-232 and King Serial interfacing to connect with legacy distance indicators.

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 450R 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) 1.35″ (34.3 mm)
Installed width (including rack) 6.30″ (160.0 mm)
Installed depth to connector backshell 11.62″ (295.1 mm)
Weight (unit only) 2.42 lbs (1.1 kg)
Weight (with install rack, connector kit, and configuration module) 3.05 lbs (1.4 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
RS-232, HSDB, King Serial, Audio Out

 

 

 

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

 

 

 

 

  • GTR 450R
  • Installation rack
  • Backplate kit
  • 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 Part 23 general aviation aircraft, the GDM 450R 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

Optional free scan capability searchers for DME stations within range1

Can reference multiple stations for optional DME-DME navigation1

Offers an alternative navigation source to satellite-based GPS

Maximizes range with 250 watts of transmit power

 

THE DME SOLUTION FOR TODAY’S GA AIRCRAFT

GDM 450R DME is a modern digital radio, designed for installation in general aviation aircraft. It’s a remote-mount unit that follows the tuning of associated NAV radio(s).

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 450R 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.

EASY INTERFACING

For seamless installation, GDM 450R integrates directly with compatible Garmin displays — no interface adapter is required. It also supports RS-232 and King Serial interfacing to connect with legacy distance indicators.

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 450R 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.