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AN/MRC-108 Communications System

DAYTON, Ohio -- The AN/MRC-108 Communication System at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The AN/MRC-108 Communication System at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- The AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator and trailer for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator and trailer for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator and trailer for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator and trailer for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Gasoline cans for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Gasoline cans for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Generator for the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Antenna from the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Antenna from the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

AN/MRC-108 being used by a Combat Control Team (CCT) in Southeast Asia (ca. 1971). (Photo courtesy of Combat Control Net)
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AN/MRC-108 being used by a Combat Control Team (CCT) in Southeast Asia (ca. 1971). (Photo courtesy of Combat Control Net)

DAYTON, Ohio (06/2013) -- Volunteers have nearly completed restoration work on the M151 Jeep. (U.S. Air Force photo)
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DAYTON, Ohio (06/2013) -- Volunteers have nearly completed restoration work on the M151 Jeep. (U.S. Air Force photo)

DAYTON, Ohio (06/2013) -- Volunteer Larry Youngblood tries out a fabricated part on the M151 Jeep. (U.S. Air Force photo)
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DAYTON, Ohio (06/2013) -- Volunteer Larry Youngblood tries out a fabricated part on the M151 Jeep. (U.S. Air Force photo)

DAYTON, Ohio  -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)
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DAYTON, Ohio -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio  -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)
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DAYTON, Ohio -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio  -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)
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DAYTON, Ohio -- Volunteers have nearly completed restoration work on the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio  -- Volunteer Larry Youngblood works on restoring the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. Plans call for the Jeep to be displayed in the Southeast Asia War Gallery. (U.S. Air Force photo by Ken LaRock)
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DAYTON, Ohio -- Volunteer Larry Youngblood works on restoring the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. Plans call for the Jeep to be displayed in the Southeast Asia War Gallery. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio  -- Volunteer Larry Youngblood works on restoring the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. Plans call for the Jeep to be displayed in the Southeast Asia War Gallery. (U.S. Air Force photo by Ken LaRock)
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DAYTON, Ohio -- Volunteer Larry Youngblood works on restoring the M151 Jeep. This vehicle was modified into a Forward Air Control (FAC) Jeep, which communicated with FAC aircraft to aid troops on the ground during the Southeast Asia War. Plans call for the Jeep to be displayed in the Southeast Asia War Gallery. (U.S. Air Force photo by Ken LaRock)

DAYTON, Ohio -- View from the front of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- View from the front of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)
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DAYTON, Ohio -- Interior of the AN/MRC-108 Communication System on display in the Southeast Asia War Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo)

The commitment of American forces to combat in South Vietnam created an urgent need for radio communications between air and ground forces, which used different radios. In response, the U.S. Air Force Electronic Systems Division developed the AN/MRC-108 in 1965 for use by USAF personnel operating on the ground. Mounted on a Ford M151-A1 Jeep, this rugged communications system included high frequency (HF), ultra high frequency (UHF), very high frequency (VHF), and VHF FM radios. It coordinated with the Direct Air Support Center with requests for immediate air support, airborne forward air controllers (FACs), strike aircraft, cargo planes, helicopters and ground forces. The M416 trailer carried antennas, rations, supplies and a gasoline-powered generator for operations at fixed locations.

In the close air support role, an enlisted ROMAD (Radio Operator, Maintainer and Driver) drove the jeep and maintained the radios while the FAC, who was a pilot, directed the aircraft striking enemy targets. In its airlift support role, the enlisted Combat Control Team (CCT) guided airdrops and airfield operations from unimproved runways. If necessary, such as during the siege of Khe Sanh when they directed the airlift operations that kept the outpost supplied, the CCT could also direct close air support strikes.

Click here to return to the South Vietnam: Build-Up and Engagement Overview.

Please note Springfield Street, the road that leads to the museum’s entrance, is undergoing construction through the beginning of September. Expect lane reductions and some delays. Please follow the signs and instructions provided by the road crews.

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