The size of this patch is 3.75" x 4".
MASS-3 entered Vietnam on 10 November 1966 when they disembarked from the USS Jennings County (LST-846) at Chu Lai. They remained in country until June 1971. On January 16 and 17, 1968, Air Support Radar Team B (ASRT-B) from MASS-3 displaced from Chu Lai to Khe Sanh to handle ground controlled radar bombing missions. On January 20 the DASC was brought into Khe Sanh as well.
During their time in Vietnam, MASS-3 Air Support Radar Teams controlled more than 38,010 AN/TPQ-10 missions, directing more than 121,000 short tons (110,000 t) of ordnance on 56,753 targets. They operated from Chu Lai and Da Nang during this time.
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