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547 Signal Troop in Vietnam, 1966 to 1971

In 1966, Prime Minister Harold Holt announced an increase in Australia’s contribution to the defence of South Vietnam. A signals intelligence support unit – 547 Signal Troop – was deployed to Vietnam following this announcement. 547 Signal Troop intercepted enemy (Viet Cong) communications, and identified and located enemy radio transmitters through direction-finding from airborne and ground-based facilities. Tactical intelligence was then produced for the Australian Task Force Commander in Vietnam. 547 Signal Troop worked as part of an integrated, cohesive effort with US Direct Support Units.

547 Signal Troop started out as a small team of 15 Australian Military Forces personnel deployed to Nui Dat. Personnel numbers grew to 35 by the end of 1967, as 547 Signal Troop established itself as a lead Direct Support Unit in the overall effort in Vietnam.

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AUM 352 ARDF Section: Air/Ground Comms, and ARDF Plotting Board Jan 1969
AUM 352 ARDF Section: Air/Ground Comms, and ARDF Plotting Board Jan 1969

These documents relate to the operation of 547 Signal Troop’s deployment in Vietnam between June 1966 and December 1971.

Defence Honours and Awards Appeals Tribunal

Progress Reports

Special Agent Reports

Airborne Radio Direction Findings

Photographs

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Cessna 180 ARDF Aircraft SVN 1969 (Note: Antenna Pod below)
Cessna 180 ARDF Aircraft SVN 1969 (Note: Antenna Pod below)

 

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547 Sig TP SVN Nui Dat
547 Sig TP SVN Nui Dat

 

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AUM 352 Sig Centre - Jan 1969
AUM 352 Sig Centre - Jan 1969

 

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AUM 352 Cryptanalyst (CPL Kinsella) in processing room - Jan 1969
AUM 352 Cryptanalyst (CPL Kinsella) in processing room - Jan 1969

 

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The Set Room at AUM 352 - Jan 1969
The Set Room at AUM 352 - Jan 1969

 

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The AUM 352 Tasking Board in the Set Room - Jan 1969
The AUM 352 Tasking Board in the Set Room - Jan 1969

 

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CAPT S Zagon, SPO at AUM 352, at his desk in the processing room at Nui Dat. Also shown are the main map of Phuoc Tuy Province (on which ARDF results etc., are plotted) and the direct phone to TAG G2 (INT) - Jan 1969
CAPT S Zagon, SPO at AUM 352, at his desk in the processing room at Nui Dat. Also shown are the main map of Phuoc Tuy Province (on which ARDF results etc., are plotted) and the direct phone to TAG G2 (INT) - Jan 1969