Abstract: A method for determining the rates of turn of the missile/target line of sight with a seeker head rigidly mounted on the missile, characterized in that the azimuth and elevation deviation angles (.psi..sub.sm and .THETA..sub.sm) of the target measured with the rigidly mounted seeker head (2) in the missile-fixed coordinate system (s.sub.1, S.sub.2, s.sub.3) are transformed to the azimuth and elevation deviation angles (.psi..sub.v and .THETA..sub.v) of the target based on the coordinate system (v.sub.1, v.sub.2, v.sub.3) of a virtual, gimbal mounted and gyrostabilized seeker head (2v) that tracks the missile/target line of sight (SL) by rotation with the rates of turn (p.sub.v, q.sub.v, r.sub.v) about its three axes (v.sub.1, v.sub.2, v.sub.3).