About this Unit
Detachment 2, 6994th Electronic Security Squadron (ESS) was a United States Air Force unit active during the Vietnam War era. The squadron operated modified EC-47 aircraft equipped for airborne radio direction finding and signals intelligence (SIGINT) missions throughout Southeast Asia. Its personnel played a vital role in detecting and locating enemy radio transmissions, directly supporting combat operations and search and rescue missions. The contributions of Det 2, 6994 ESS significantly enhanced the effectiveness of U.S. and allied forces by providing timely electronic intelligence and situational awareness on the battlefield.
Historical Facts
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Unique Mission: Detachment 2, 6994th Security Squadron (later Electronic Security Squadron - ESS) was a U.S. Air Force signals intelligence (SIGINT) unit during the Vietnam War, specializing in airborne radio direction finding and electronic surveillance.
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Aircraft Flown: The unit operated modified EC-47 “Electric Goon” aircraft, which were C-47 Skytrains equipped with sophisticated electronic eavesdropping and direction-finding gear.
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Vital Role in Vietnam: Det 2, 6994 ESS played a crucial role in tracking Viet Cong and North Vietnamese Army communications, helping to locate enemy units and supply lines.
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Location: The detachment was based at Pleiku Air Base in central South Vietnam, strategically positioned to cover the Ho Chi Minh Trail and Central Highlands.
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Joint Operations: The unit often worked closely with Army and Marine ground forces, providing real-time intelligence that enabled successful ambushes and interdictions.
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High Risk Missions: EC-47 crews faced serious threats from anti-aircraft artillery, small arms fire, and the danger of flying over hostile territory at low altitudes.
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Decorations: Members of Det 2, 6994 ESS earned multiple Air Medals, Distinguished Flying Crosses, and even the Air Force Cross for valor during their hazardous missions.
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Notable Losses: The unit suffered casualties, including the loss of EC-47 tail number 43-49771, which was shot down on March 9, 1967, resulting in the deaths of all crew members.
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Code Name: The EC-47 missions were sometimes referred to under the call sign “CAP,” such as "CAP 53," with each mission and crew using unique identifiers.
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Legacy and Reunion: Alumni of the 6994th and its detachments, including Det 2, maintain strong bonds and hold regular reunions to honor their service and fallen comrades; their legacy is preserved by the EC-47 History Site.
