System for aircraft navigation, comprising: a first aircraft with a first communication unit comprising a radar ; a second aircraft with a second communication unit designed to send a beacon signal to the first aircraft ; wherein the first aircraft is adapted to determine coordinates of positions of a plurality of waypoints ; which waypoints are determined with respect to a reference system; wherein each of the plurality of waypoints together defines a flight trajectory of the first aircraft ; wherein the first communication unit is adapted to transmit the coordinates of the positions of the waypoints to the second communication unit ; and wherein the second aircraft is adapted to navigate to the positions of the waypoints ; and wherein the first aircraft further comprises a first processing unit that is adapted to determine a position of the second aircraft ; characterized in that the first processing unit is adapted to determine the position of the second aircraft based on an angular position of the second aircraft with respect to the first aircraft and a distance between the first aircraft and the second aircraft ; wherein the beacon signal sent from the second communication unit is received by the radar in a passive mode of the radar and the angular position of the second aircraft with respect to the first aircraft is determined by the first processing unit by means of the received beacon signal; and wherein the radar is adapted to receive a skin echo from the second aircraft in an active mode of the radar and the distance between the first aircraft and the second aircraft is determined by the first processing unit based on a time of the skin echo . a second aircraft with a second communication unit designed to send a beacon signal to the first aircraft ; wherein the first aircraft is adapted to determine coordinates of positions of a plurality of waypoints ; which waypoints are determined with respect to a reference system; wherein each of the plurality of waypoints together defines a flight trajectory of the first aircraft ; wherein the first communication unit is adapted to transmit the coordinates of the positions of the waypoints to the second communication unit ; and wherein the second aircraft is adapted to navigate to the positions of the waypoints ; and wherein the first aircraft further comprises a first processing unit that is adapted to determine a position of the second aircraft ; characterized in that the first processing unit is adapted to determine the position of the second aircraft based on an angular position of the second aircraft with respect to the first aircraft and a distance between the first aircraft and the second aircraft ; wherein the beacon signal sent from the second communication unit is received by the radar in a passive mode of the radar and the angular position of the second aircraft with respect to the first aircraft is determined by the first processing unit by means of the received beacon signal; and wherein the radar is adapted to receive a skin echo from the second aircraft in an active mode of the radar and the distance between the first aircraft and the second aircraft is determined by the first processing unit based on a time of the skin echo . <EOS>