Blackjack HX-21 Squadron Insignia - Naval Aviation Heritage #1667629 (License: Personal Use)

This official insignia for Helicopter Sea Combat Squadron 21 (HX-21), known as the “Blackjacks,” integrates classic playing card iconography with modern naval warfare motifs. The crowned King of Spades holds a ceremonial sword while emerging from overlapping ace cards, all framed by a black-and-gold circular banner bearing “BLACKJACK” and “HX-21.” A red cross in the background nods to the squadron’s heritage and mission focus on combat support and search-and-rescue operations.

Used on official Navy websites, squadron merchandise, flight gear, and public relations materials; targets military history enthusiasts, veterans, active-duty personnel, and fans of naval aviation seeking authentic unit identity and symbolism.