Tactical Air Control Squadron Twenty-One (TACRON-21) is a specialized U.S. Navy unit that provides centralized planning, control, and integration of air operations for amphibious and expeditionary warfare. TACRONs manage air assets, such as helicopters and jets, from ship or shore, supporting operations like air assault, reconnaissance, and air traffic control. This is the ‘blue-red-yellow’ version of one of their patches and does not come with velcro attached.