ADA (Air Defense Artillery) Center and School Unit Crest (Militant) - Sold in Pairs SBBA~Double~11181DBR Machinist's Mates are typically responsible

Machinist's Mates are typically responsible for the continuous operation of the engines

Criteria: These distinctive unit insignia (DUI) are worn by the 8th Transportation Brigade

Roosevelt's Executive Order 9265

Criteria: These distinctive unit insignia (DUI) are worn by the Medical Department Activity (MEDDAC)

ADA (Air Defense Artillery) Center and School Unit Crest (Militant) - Sold in Pairs SBBA~Double~11181DBR Machinist's Mates are typically responsibleUnited States Army ADA (Air Defense Artillery) Center and School Unit Crest (Militant) Criteria: Unit Crests are unique to each unit in the U. S. Army and are officially known as Distinctive Unit Insignia although most Soldiers refer to them as "Unit Crests." The insignia design is derived from the coat of arms authorized for a unit. All personnel assigned to the organization wear the insignia, except general officers, the Sergeant Major of the Army