PURPOSE: To obtain a missile having long range and all weather property, by a method wherein a master projectile has an antenna and a small size rocket motor and the drop of the master projective is restrained by the reverse injection of the same after discharging slave projectiles so as to position at the rear side of the slave projectiles than a target as the projector of slave projectile seakers.

CONSTITUTION: When a master projectile 1 flying toward a target 12 has arrived at a predetermined position above the target 12 by inertia guidance or active radar homing guidance, slave projectiles 7 are discharged. The master projectile 1, which has discharged the slave projectiles 7, ignites a small size rocket motor 6 attached to the rear side surface of the master projectile 1 to prevent the dropping of the master projectile by injecting exhaust gas downwardly while the master projectile transmits radio waves 13 toward the target 12 at a given position of the projectile. The injecting direction and the amount of injection are controlled by a gyro 4 and a control device 5 to stabilize the master projectile spatially and secure the stabilized projection of radio waves as well as the position of standoff. The slave projectiles receive reflecting waves 14 from the target 12 of master projectile transmitting wave 13 to operate the steering blade 11 of the slave projectiles by a guidance control device 10 and track the target 12.