The presidential air squad is comprised of four of the president‘s first-choice aircraft rather than one. This is not a case of reliability, but one of security. As soon as knowledge of an international flight is public, all four aircraft are readied for departure. The specific plane to be used by Vladimir Putin is not known until take-off. After the choice is made, either one or all three of the remaining airplanes follow the president as the reserve. In total, the air squad's fleet is made up of 68 airplanes. 64 of them are utilised, while the remaining four are kept in storage.