ShieldPer fess wavy Gules and Azure in chief on an oval escutcheon of the first (Gules) in front of the cannon saltirewise Or an Artillery projectile paleways within a bordure of the last (Or) in base a submarine mine of the like (Or).
SupportersTwo cannons paleways Or.
MottoDEFENDIMUS (We Defend).
ShieldThe design was used by The Coast Artillery School for many years but was never recorded by the War Department. It is a shield of red and blue parted horizontally by a wavy line; on the upper red portion of the shield is the insignia of the Coast Artillery, and on the lower blue portion a submarine mine in gold. A scroll bearing the words "Coast Artillery School" may be added to the device.
SupportersTwo cannons, muzzles up, are used as supporters.
The device was approved on 8 November 1924.