844th Engineer Battalion Unit Crest (Terra Ad Caelum) - Sold in Pairs SBBA~Double~11065DBR The three wing spiral symbolizes

The three wing spiral symbolizes both helicopters and fixed wing aircraft

The Integrated Undersea Surveillance System insignia is one of the rarest insignia of the Navy as it is only presented to enlisted sailors who hold sonar ratings and to limited duty and restricted line officers trained in sonar operations

Criteria: These unit crests

Approved for wear in 1967 for the 1st Battalion

844th Engineer Battalion Unit Crest (Terra Ad Caelum) - Sold in Pairs SBBA~Double~11065DBR The three wing spiral symbolizesUnited States Army 844th Engineer Battalion Unit Crest (Terra Ad Caelum) Criteria: These are the unit crests worn by the the 844th Engineer Battalion (844th EN) out of Knoxville, Kentucky. The crests show the unit's motto: Terra ad Caeluma, or "Earth to Sky." Unit crests are worn on the Army's Class A (green) and ASU (blue) uniforms. Note: Sold in pairs (i. e., if you order a quantity of 1 you will receive two Unit Crests).