The Diver Insignia are qualification badges of the Uniformed Services of the United States

Uniformed services of the United States

The United States has seven federal uniformed services that commission officers as defined by Title 10, and subsequently structured and organized by Title 10, Title 14, Title 33 and Title 42 of the United States Code.-Uniformed services:...

 which are awarded to servicemen qualified as divers. Originally, the Diver Insignia was a cloth patch decoration worn by United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 divers in the upper-portion of the enlisted service uniform's left sleeve during the first part of World War II when the rating insignia was worn on the right sleeve. When enlisted rating insignia were shifted to the left sleeve in late World War II, the patch shifted to the upper right sleeve.