Shield
Or two spears in saltire Gules, within a bordure embattled barry of eight Argent, of the second and Azure, repeated.
Crest: On a wreath of the colors Or and Gules a representation of Diamond Head Gules.
Motto
KAPU (Keep Out).
Shield
The shield is essentially Hawaiian. The crossed spears are taken from Hawaiian history, they were formerly placed at the King's tent, and are shown conventionally in the Hawaiian arms by a saltire cross placed on an inescutcheon. The motto, probably the best know Hawaiian word, is used extensively as a sign against trespassers.
Crest
The batteries at Diamond Head constitute the principal element of these defenses.
The coat of arms was originally approved for the Coast Defense of Honolulu on 27 January 1922. It was redesignated for the 16th Coast Artillery Regiment on 27 February 1929. The insignia was redesignated for the 16th Antiaircraft Artillery Gun Battalion on 11 September 1952.