Helicopter Sea Combat Squadron Four (HSC-4) (previously Helicopter Anti-Submarine Squadron Four (HS-4)), also known as the "Black Knights", is a multi-role combat helicopter squadron of the US Navy based at NAS North Island, CA which operates Sikorsky MH-60S Seahawk helicopters deployed aboard aircraft carriers. The squadron was originally established as HS-4 on 30 June 1952 at U.S. Naval Auxiliary Landing Field Imperial Beach with the Sikorsky HO3S-1 and was redesignated HSC-4 on March 29, 2012. It is currently assigned to Carrier Air Wing Two (CVW-2) which deploys aboard USS Carl Vinson (CVN 70). This is their Combat Search and Rescue (CSAR) patch that says "TO HELL AND BACK" and does not come with velcro attached.