Each of the four ACH-47's went by Go-Go (plus the last two numbers in their tail number), but that was only between aircraft in flight.     The unit Call Sign was commonly "Go-Go Birds" early on ('66 thru mid '67), but became "Guns A Go-Go" exclusively from mid '67 until they de-activated in March '68.;

    During the time they were being evaluated in Vung Tau (Apr '66 - Dec '66), they were attached to the 147thASHC, but when they went north to An Khe, they were attached to the 228thASHB.