From the website:
The mission of the United States Navy Flight Demonstration Squadron is to showcase the pride and professionalism of the United States Navy and Marine Corps by inspiring a culture of excellence and service to country through flight demonstrations and community outreach.
The Blue Angels have flown over 10 different aircraft in the team’s 65 year history. Originally, the team flew four aircraft in the signature “Diamond” formation and expanded to six aircraft to showcase both the diamond and solos high performance capability as well as the precision formation flying taught to all Naval Aviators. Today, the squadron flies the Boeing F/A-18 Hornet and the Lockheed Martin C-130 Hercules. When the squadron receives a F/A-18 Hornet from the fleet, which are at the end of their carrier arrestment functionality, we make a variety of modifications, including removing the nose cannon to install a smoke-fluid system, inverting a fuel pump, installing a stop watch and adjustable constant-tension stick spring, as well as the world-wide recognizable paint scheme.