An RCC can have any orientation in space. It is limited by a cylindrical surface and by two plane faces perpendicular to its axis. (If the cylinder axis is parallel to one of the coordinate axes, it is worth considering instead the use of an infinite cylinder XCC, YCC or ZCC (see below), leading to increased tracking speed). Each RCC is defined by 7 numbers: V_x, V_y, V_z (coordinates of the centre of one of the circular plane faces), H_x, H_y, H_z (x, y and z components of a vector corresponding to cylinder height, pointing to the other plane face), R (cylinder radius). An RCC definition extends over 2 lines in default fixed format, or over 3 lines in high-accuracy body fixed format. Example in default fixed format:*...+....1....+....2....+....3....+....4....+....5....+....6....+....7..RCC 07 5.0 5.0 5.0 57.735027 57.735027 57.735027 37.* (a circular cylinder 100 cm long and of 37 cm radius, with base* centred at point x=5, y=5, z=5, its axis making equal angles to* the coordinate axes).The same example in high-accuracy body fixed format:*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+.RCC 07 5.0 5.0 5.0 57.73502691896258 57.73502691896258 57.73502691896258 37. The same, in free format: RCC BYGCYL 5.0 5.0 5.0 57.73502691896258 57.73502691896258 57.73502691896258 37.