United States Armed Forces ) are currently the most powerful and strongest troops in the world, with an active staff of approximately 1.36 million people and a budget of $ 686 billion in 2018. One of their most important components is the United States Navy (US Navy), considered the most powerful in the world. However, its most important ships - apart from SSBN submarines - are nuclear-powered aircraft carriers of the Nimitz and Ford classes. Each of them is able to take on board up to 90 aircraft, and the Flight Deck Crew is responsible for their activities on the aircraft carriers, whose tasks are the same on each carrier. In order to facilitate activities, its members wear vests of different colors, corresponding to the specific tasks of the crew members. In total, 8 colors of vests are worn, and the soldiers wearing them are responsible, among others, for: yellow (catapult service, air deck and hangar traffic), green (landing aid, aircraft wing control, helicopter landing operation service), white (medical aid , but also e.g. handling liquid oxygen containers) or red (handling bombs and rockets, hanging them under planes, fire service). In addition, the aircraft carrier still has crew members dressed in blue, purple, brown and white and black. The Air Officer is responsible for all air operations.